Chapter 6: Sustainable Agriculture
Far above the Arctic Circle, on the Norwegian island group of Svalbard, a concrete entrance juts out of a frozen hillside. Behind it, a tunnel runs deep into rock that stays below freezing all year. This is the Svalbard Global Seed Vault, opened in 2008. It grows nothing and sells nothing. It stores sealed packets of seed — duplicates of samples already held in gene banks across the world — as a backup copy of the crops humanity farms.
For years the vault only received deposits. Then, in 2015, an agricultural research centre that had been working in Aleppo, in Syria, had to move its operations because of the conflict there. Its own collection of wheat, barley, lentil and chickpea seed — varieties gathered over decades from the dry lands of West Asia — was no longer safe. The centre asked Svalbard for its seeds back. It received them, grew them out in new locations, and later sent fresh duplicates north again.
The episode made a quiet point. A seed is not only a thing a farmer plants. It is a store of information, built up over thousands of harvests, and it can be lost. This chapter is about how food is grown, why the way we grow it changed so sharply in the last century, and what it takes to keep both the harvest and the land that produces it.
Diagram
Fig. 6.0-1 – cutaway sketch of a seed vault set into a frozen hillside: entrance portal above snow line, sloping access tunnel, three sealed storage chambers inside permafrost rock, labelled shelves of sealed seed boxes; small inset showing a hand holding four different grain seeds
Keep these five questions in mind as you read. Each one is answered somewhere in this chapter.
6.1 Systems of Farming: The Working Definitions
Walk past three fields on the same morning and you may see three different worlds. In one, a farmer is broadcasting seed by hand into a plot where two crops already stand together. In the next, a tractor-drawn spreader is laying down urea in straight lines. In the third, a plot is being left deliberately weedy while cattle dung is dug in at the edges.
All three are agriculture. They differ in one thing above all: how much comes from outside the farm, and how much the farm makes for itself. That single question — where do the inputs come from? — is the thread running through this whole chapter.
The syllabus fixes six terms that you will meet again and again in the pages that follow. This section defines each one precisely, so that later sections can use them without stopping to explain. Read them as a set, not as six separate items, because each is partly defined by what it is not.
You will notice in Fig. 6.1-1 that the six systems can be laid out roughly along a line, from those depending almost entirely on what the farm itself produces to those depending heavily on purchased inputs.
Diagram
Fig. 6.1-1 – horizontal spectrum bar labelled “dependence on purchased external inputs”, low at left to high at right; six labelled markers placed along it in order: natural farming (lowest), traditional agriculture, organic agriculture, sustainable agriculture (spanning a band rather than a point), modern agriculture, gene revolution (highest); small icons above each marker — hand-sown seed, bullock, compost heap, mixed field, fertilizer bag, laboratory flask
6.1.1 Traditional Agriculture
Traditional agriculture is the oldest of the six. It is farming carried out with locally available seed, animal power, organic manure and knowledge passed down within a farming community, rather than with purchased industrial inputs.
Its defining feature is that the farm is largely a closed loop. Crop residues feed the cattle, cattle dung returns to the field, seed for next season is kept back from this season’s harvest, and very little has to be bought.
Yields per hectare in such a system are usually modest. But the costs are also low, and a bad year does not leave the household holding a loan for seed and fertilizer it has already spent.
6.1.2 Natural Farming
Natural farming goes a step further and deliberately reduces even the interventions traditional farming accepts. The approach is associated with the Japanese farmer Masanobu Fukuoka, who worked through the middle decades of the twentieth century and described his method as “do-nothing” farming.
The name is misleading if taken literally. Fukuoka did not mean idleness; he meant that ploughing, weeding, chemical fertilizer and pesticide should all be dropped, and the soil’s own processes allowed to do the work. Straw from the previous crop is left on the surface, and seed of the next crop is sown into the standing one.
In India, cow-based versions of natural farming are practised under names such as Rishi Kheti (literally, “the farming of the sages”), in which cattle products and herbal preparations replace bought chemicals altogether.
6.1.3 Organic Agriculture
Organic agriculture occupies the middle ground. It permits active management — ploughing, transplanting, irrigation, pest control — but excludes synthetic chemical fertilizers and pesticides, relying instead on compost, green manure, crop rotation and biological methods of pest control.
The difference from natural farming is one of intervention, not of chemistry. Both avoid synthetic inputs; only organic agriculture is willing to work the soil hard, add prepared manures, and release predatory insects to fight pests.
Note that “organic” is a legal category as well as an agricultural one. Produce sold as organic in India must be certified against a defined standard, because a buyer in a city market has no way of inspecting a field two states away.
6.1.4 Modern Agriculture
Modern agriculture is the input-intensive system that spread across most of the world during the twentieth century. The syllabus fixes its four defining components, and it is worth taking each in turn, because the terms are often confused.
A hybrid seed is produced by deliberately crossing two carefully maintained parent lines. The first generation from that cross is unusually vigorous and uniform. The catch is that the seed saved from a hybrid crop does not breed true, so the farmer must buy fresh seed each season.
A high yielding variety (HYV) is a variety bred to convert heavy doses of fertilizer and water into grain rather than into leaf and stem. Most of the famous HYVs of wheat and rice are semi-dwarf: short, stiff-strawed plants that carry a heavy grain head without falling over. A high yielding variety need not be a hybrid, and a hybrid need not be high yielding — the two words describe different things.
A chemical fertilizer is a manufactured compound supplying plant nutrients in concentrated, readily available form, such as urea for nitrogen or single superphosphate for phosphorus. A pesticide is a chemical used to kill or suppress organisms that damage a crop, the word covering insecticides, fungicides, herbicides and rodenticides together.
Because the same field is now being asked to produce far more, the whole package has to arrive together. An HYV planted without fertilizer and water will often yield less than the local variety it replaced. This point matters a great deal in section 6.7, when we weigh what the Green Revolution did and did not achieve.
6.1.5 The Gene Revolution
The gene revolution is the name given to the more recent phase in which crop improvement moved from breeding to direct alteration of the plant’s genetic material in the laboratory.
A genetically modified (GM) seed carries one or more genes deliberately inserted from another organism, sometimes from an entirely different kingdom. The best known example is cotton carrying a gene from the soil bacterium Bacillus thuringiensis, which makes the plant produce a protein toxic to certain caterpillar pests. Bt cotton has been the only genetically modified crop approved for commercial cultivation in India.
The distinction from conventional breeding is worth holding on to. A plant breeder crossing two wheat lines can only combine genes that the two parents already carry. Genetic modification lifts that restriction — which is precisely what makes the technology powerful and what makes it contested. Its supporters point to reduced insecticide spraying and higher net returns; its critics raise questions about long-term ecological effects, about who owns the patented seed, and about the loss of local varieties it displaces. Those arguments return in sections 6.7 and 6.14.
6.1.6 Sustainable Agriculture
The sixth term is the one the chapter is named after, and it is best understood as an answer to a question the other five raise: can a farming system keep producing well without using up the base it stands on?
Sustainable agriculture is farming that meets the food needs of the present generation without degrading the soil, water, genetic resources and ecological processes that future generations will need in order to farm at all.
Two things follow from that definition, and both are easy to miss.
First, sustainability is not the same as low yield. A system that conserves the soil beautifully but cannot feed the people who depend on it has failed on its own terms, because “meets the needs of the present” is part of the definition, not an optional extra.
Second, sustainability is not the same as being organic. Sustainable agriculture is a goal; organic farming, natural farming and integrated pest management are among the routes towards it. A farm may use a modest, carefully timed dose of chemical fertilizer and still be more sustainable overall than one that uses none but leaves its soil bare and eroding.
6.2 Irrigation Systems
6.2.1 Why Irrigation Is Needed
Most of India’s rain falls in a few months of the year, and it falls unevenly across the country. A field in a high-rainfall district may receive more water in a single week of July than a field in western Rajasthan receives in a year. Yet crops need water spread through their growing period, not delivered in one burst.
Irrigation is the artificial supply of water to land in order to grow crops, applied when and where rainfall alone cannot meet the crop’s requirement.
Irrigation does more than prevent drought loss. It makes a second crop possible in the dry season, allows varieties with a short, water-hungry growing period to be grown, and steadies output from year to year. That last point is the important one for this chapter: an irrigated farm is a predictable farm, and predictability is what allows a farmer to risk investing in seed and fertilizer at all.
Irrigation systems are usually divided into two broad families by the scale at which water is moved and the way it is delivered to the plant.
6.2.2 Macro Irrigation: Canal Systems and Dams
Macro irrigation moves large volumes of water over long distances through open channels, and delivers it to whole fields at once. Its typical form in India is canal irrigation fed by a dam or a barrage across a river.
The structure is easiest to picture as a branching tree, as shown in Fig. 6.2-1. A dam impounds river water in a reservoir. A main canal leads out of it, dividing into branch canals, then distributaries, then small field channels that flood the plots one after another. The whole area a canal system can serve is called its command area.
Diagram
Fig. 6.2-1 – schematic plan of a canal irrigation system: river with dam and reservoir at top, main canal leading off, branching into two branch canals, then distributaries, then field channels flooding rectangular plots; boundary of the command area marked with a dashed line; a low-lying corner of the command area shaded and labelled “waterlogged and saline patch”
The advantages are real and large. One structure can irrigate lakhs of hectares. Water is delivered by gravity, so no pumping energy is needed once it is in the canal. The reservoir also stores flood water, generates electricity in many schemes, and supplies towns downstream.
The disadvantages are equally real. Water standing in unlined earthen channels seeps away, and much of what is released never reaches a crop. Where the water table rises under a command area, the land becomes waterlogged; where that shallow water evaporates from the surface, it leaves behind the salts it carried, and the soil turns saline. Both problems tend to appear at the tail end of the system, in exactly the low-lying places where drainage is already poor.
There is a distributional problem too, and it is a standing feature of canal systems everywhere. Farmers near the head of a canal get water first, in fuller measure and at more reliable times, than farmers at its tail. Building a canal therefore does not distribute water equally across a command area; it distributes it along a gradient, and where a farmer’s field sits on that gradient is largely an accident of geography.
Finally, the reservoir behind a large dam submerges land. Forest, farmland and settlements go under water, and the people living there must move. Whether the gains downstream justify that cost is one of the most argued questions in Indian development policy, and it has no settled answer — supporters point to the assured harvests and power generated for millions, critics to the displacement of communities who often receive little of either.
6.2.3 Micro Irrigation: Sprinkler, Drip, Trickle Drip and Dug Wells
Micro irrigation takes the opposite approach. Instead of flooding a field, it delivers small, measured quantities of water under pressure through a network of pipes, close to where the plant actually takes it up.
In a sprinkler system, water is pumped through pipes to nozzles that throw it into the air, so that it falls on the crop like rain. Coverage is even, sloping and uneven land can be irrigated without levelling, and far less water is lost to seepage than in an open channel.
In drip irrigation, also called trickle irrigation, water is carried in narrow tubes laid along the crop rows and released drop by drop through emitters placed at the base of each plant. Only the root zone is wetted; the soil between rows stays dry. Because almost nothing is exposed to evaporation or run-off, drip is the most water-efficient method available, and fertilizer dissolved in the water can be delivered to the roots with it.
Compare the three wetting patterns in Fig. 6.2-2 and the reason for the difference becomes obvious.
Diagram
Fig. 6.2-2 – three soil cross-sections side by side, each 60 cm deep with a plant at the centre; (a) flood irrigation — entire surface and full profile shaded wet, arrows showing evaporation from surface and deep percolation below root zone; (b) sprinkler — surface wetted evenly, some evaporation arrows from droplets in air; (c) drip — narrow bulb of wet soil around the root zone only, dry soil either side; label under each: “water reaching root zone” high in (c), lower in (b), lowest in (a)
A dug well is the oldest form of small-scale irrigation still in wide use: a wide, hand-dug shaft sunk to the water table, from which water is lifted by animal power or a small pump and led to nearby fields. Its scale is a single holding, its cost is within the reach of one household, and the farmer controls the timing completely.
Its limitation is the aquifer beneath it. A dug well is shallow, so it falls dry when the water table drops — which is exactly what happens when many wells and tube wells in the same area draw more water each year than the monsoon puts back. A private well gives a farmer independence from the canal schedule, but it does not give independence from the neighbours pumping the same groundwater.
6.2.4 Traditional Rainwater Harvesting Structures
Long before canals or pumps, farming communities across India were solving the same problem with earth, stone and slope. Each region developed a structure fitted to its own rainfall, soil and terrain — and the fit is the whole point. A structure that works in the Thar Desert would be pointless in Ladakh, and vice versa.
Rainwater harvesting is the collection and storage of rainfall or surface run-off, either for direct use or to recharge groundwater, instead of allowing it to run off and be lost.
The seven structures below are the ones the syllabus names. As you read them, keep asking the question that explains each design: what is scarce here, and what is the water doing when it arrives?
6.2.4.1 Tankas and Khadins of the Arid North-West
A tanka is an underground, covered storage tank, usually circular, built in the arid districts of Rajasthan. Rainwater falling on a prepared catchment — a rooftop, a paved courtyard or a sloping compound — is led into it through channels and stored, most often for drinking rather than for irrigation.
Everything about the design answers the local problem. Rainfall is a few days of the year, so storage must be large relative to the catchment. Evaporation is fierce, so the tank is sunk into the ground and covered. Water may have to last many months, so it is kept for the use that matters most.
A khadin solves the other half of the problem: how to grow a crop where the rain is too little and the rock too bare. On the rocky uplands of the Jaisalmer region, run-off is generated fast because the ground absorbs almost nothing. A long earthen embankment, called a bund, is built across the lower edge of a gentle slope. Run-off collects behind it in a shallow sheet, soaks slowly into the soil, and a crop is then sown on the residual moisture after the standing water has gone.
Diagram
Fig. 6.2-3 – cross-section of a khadin: rocky upland catchment on the left with run-off arrows, gentle slope, earthen bund on the right retaining a shallow sheet of water; arrows showing infiltration into the soil below; second panel to the right showing the same field after the water has receded, with a crop growing on stored soil moisture; sluice at one end of the bund labelled
6.2.4.2 Ahar and Pyne Systems of South Bihar
The plains of south Bihar have sandy soil that holds water poorly and a landscape with a gentle natural gradient. The traditional answer works as a pair, and the two parts should always be learnt together.
An ahar is a catchment basin embanked on three sides, the fourth side being left open where the natural slope of the land closes it. Run-off and flood water collect in it and are held for use in the dry months.
A pyne is an artificial channel that carries water from a river or stream across the fields and finally into an ahar. The pynes distribute; the ahars store. Together they make a single system, maintained collectively by the villages along it, and it is that collective maintenance — not the earthwork itself — that usually decides whether such a system still functions.
6.2.4.3 Zings of the Cold Desert
In Ladakh, the scarce thing is not rainfall but liquid water at the right time of day. Precipitation is very low, and what supplies the fields is glacial meltwater, which flows strongly through the afternoon as the sun works on the ice and slows to almost nothing overnight.
A zing is a small tank built to catch that meltwater, fed by a network of guiding channels from the glacier. Water collects through the day, and the stored supply is used on the fields the following day. The structure is not solving scarcity of total water so much as a mismatch of timing — which is why nothing like it appears anywhere else on this list.
6.2.4.4 Johads and Eris
A johad is a small earthen check dam, built across a slope or a seasonal drainage line in semi-arid Rajasthan, with embankments on three sides. It holds back flowing rainwater in a shallow pond. Some of that water is used directly, but its main work is to sit there long enough to percolate downwards and raise the groundwater table, so that wells in the surrounding area yield through the dry season.
An eri is the tank irrigation system of Tamil Nadu, where thousands of such tanks have stored monsoon run-off for centuries, often arranged in chains so that the overflow of one feeds the next. An eri does three jobs at once: it irrigates paddy, absorbs flood peaks that would otherwise damage the land below, and recharges groundwater over its bed.
6.3 Pre-colonial Agriculture in India
To judge what changed under colonial rule, and what changed again after 1947, you need a clear picture of what Indian agriculture looked like before either. That picture is easy to get wrong in two opposite ways.
One error is to imagine a countryside of unchanging poverty, waiting to be improved. The other is to imagine a lost golden age in which every field was fertile and nobody went hungry. Neither is accurate. Pre-colonial Indian agriculture was a productive, knowledge-rich system that supported a large population, sustained long-distance trade in cotton, indigo, sugar and spices, and also suffered periodic crop failure and famine when the monsoon failed badly.
What is worth studying is its logic: the set of choices a cultivator made, and the reasons behind them. Three features define it.
6.3.1 Growing for Sustenance Rather than for Market
The typical cultivator grew, first and foremost, what the household would eat. This is called subsistence farming — production organised around the consumption needs of the producer, with only the surplus entering exchange.
That does not mean nothing was sold. Markets existed, towns had to be fed, and India was a major exporter of cotton cloth, sugar, pepper and indigo for centuries before European trading companies arrived. But for the ordinary cultivator, the market was where the remainder went, after the household’s grain, the next season’s seed, the cattle’s fodder, the share owed as revenue and the customary payments to village artisans had all been set aside.
This ordering had a direct effect on what was planted. A household eating its own harvest wants a spread of foods across the year and protection against any one crop failing. It therefore plants coarse grains alongside fine ones, pulses alongside cereals, and something that will survive if the rain stops early. A household growing for sale wants the single crop that fetches the best price, planted across the whole holding. The two aims pull in opposite directions, and almost every change described in section 6.4 follows from a shift between them.
6.3.2 Multi-cropping and Diversity in Seed
The second feature follows directly from the first. Multi-cropping — growing more than one crop from the same piece of land in a year, or growing several crops together on it — was the normal practice rather than the exception.
The reasoning is a farmer’s reasoning about risk, not a modern ecological argument read backwards into the past. Two crops sown together do not fail together. A deep-rooted crop and a shallow-rooted one draw water from different depths. A pulse sown with a cereal restores to the soil some of what the cereal takes out. A tall crop shades a shorter one that cannot take full sun. Every one of these arrangements buys a little insurance at the cost of a little peak yield.
Alongside this went an extraordinary diversity in seed. A landrace is a locally developed crop variety, shaped over many generations by farmer selection under the specific conditions of one place — its rainfall, its soil, its pests, its cooking preferences.
India held thousands of rice landraces alone. Some tolerated saline coastal soils; some could elongate their stems fast enough to keep their heads above rising flood water; some matured quickly enough to be harvested before the soil dried out. No single variety did all of these things, and none needed to, because each was grown where it fitted.
Seed for the next season came out of this season’s harvest and moved between households by gift and exchange. That is a crucial structural point: the seed supply sat inside the farming system rather than outside it. Nothing had to be bought, and nothing could be withheld.
6.3.3 Techniques for Maintaining Soil Health
Every harvest removes nutrients from a field. Grain and straw carry away nitrogen, phosphorus and potassium, and if nothing replaces them, yields fall within a few seasons. Since manufactured fertilizer did not exist, the whole system had to be arranged so that what left the soil found its way back.
Four practices did most of that work.
The first was manuring with cattle dung and household waste. Crop residues fed the cattle; the cattle’s dung, mixed with bedding and swept-up litter, went back to the field as farmyard manure. Where cattle were penned on a field between seasons, they manured it directly.
The second was the use of legumes — the pulse family. Legumes carry bacteria in nodules on their roots that convert nitrogen gas from the air into a form plants can absorb. If you have wondered why gram, pigeon pea, black gram and lentil appear so persistently in Indian cropping patterns, this is a large part of the reason: a pulse crop leaves the soil richer in nitrogen than it found it, which no cereal does.
The third was fallowing — leaving land uncropped for a season or longer so that natural processes rebuild fertility. Where population was thin and land plentiful, long fallows were affordable. In hill regions, cultivators practised jhum, a shifting cultivation in which a patch was cleared and cropped for a few years, then left to regrow for a much longer period before being returned to.
The fourth was the deliberate movement of fertile material onto fields: silt dug out of tanks and ponds after the monsoon, ash, leaf litter and pond mud, all carried to the plots that needed them most.
Read together, these four form a closed nutrient loop, drawn in Fig. 6.3-1. Nutrients circulate between soil, crop, animal and back to soil, with the only fresh input arriving free of charge from the atmosphere by way of the legumes.
Diagram
Fig. 6.3-1 – closed nutrient loop of a pre-colonial farm, drawn as a cycle: soil → crop → grain to household and residue to cattle → cattle dung and household waste → farmyard manure → back to soil; two additional arrows entering the cycle, one labelled “nitrogen fixed from air by legume root nodules” and one labelled “tank silt, ash and leaf litter carried to the field”; one arrow leaving, labelled “nutrients exported in grain sold or paid as revenue”
Two honest limitations of this system should be stated plainly. Yields per hectare were low by present-day standards, so feeding a much larger population from the same land would not have been possible. And the arrangement depended on things that later became scarce — plentiful land for long fallows, enough fodder for the cattle that supplied the manure, and enough common grazing land to keep those cattle at all.
The nutrient loop of Fig. 6.3-1 has one arrow leaving it and no chemical arrow coming in. Notice what happens to such a system if that outgoing arrow is made much larger — if far more of the harvest has to leave the village, year after year, as revenue or as a crop grown for export. That is the subject of the next section.
6.4 Colonial Influence on Indian Agriculture
British rule did not introduce markets to Indian agriculture, and it did not invent taxation of the land. Both existed long before. What changed under colonial administration was the form of the revenue demand, the direction in which produce moved, and the terms on which a cultivator held land — and those three changes together reshaped what was grown and how.
This section describes those changes and their consequences. It is a contested field of history, and the last part of the section sets out where historians disagree, because you should be able to state the argument on both sides rather than only one.
6.4.1 Punitive Taxation and the Revenue Settlements
Land revenue was the largest single source of income for the colonial state, and the arrangements for collecting it were fixed by a series of settlements.
The earliest and best known was the Permanent Settlement, introduced in Bengal in 1793. It recognised zamindars as proprietors of the land and fixed the revenue they owed to the state permanently, in cash. In other regions different systems were used: under the ryotwari settlements of the Madras and Bombay presidencies, revenue was assessed directly on the individual cultivator, and under mahalwari arrangements in the north it was assessed on the village as a unit.
Three features of these arrangements mattered far more than the differences between them.
The demand was in cash, not in a share of the grain. A cultivator who had previously handed over part of the harvest now had to convert produce into money before the collection date, whatever the price happened to be that season.
The demand was fixed in advance and did not adjust to the harvest. In a good year this was manageable. In a poor year the same sum still fell due, exactly when the household had least to sell.
Default was punished by loss of the land. A holding could be sold to recover arrears. Land, which had been held under customary claims that were hard to extinguish, became a transferable asset that could pass out of a family’s hands over one bad season.
Follow the chain of consequences in Fig. 6.4-1. To raise cash on a deadline, cultivators had to sell at harvest time, which is when prices are lowest. To bridge the gap they borrowed, usually from a local moneylender, at rates that a subsistence holding could rarely repay out of its own produce. Debt then had to be serviced from the next harvest, so still more had to be sold, and in a bad year the land itself was transferred to the creditor.
Diagram
Fig. 6.4-1 – flow: fixed cash revenue demand → produce must be sold at the collection date → sale at harvest-time low prices → shortfall in the household’s own grain → borrowing from moneylender at high interest → larger share of next harvest must be sold → debt accumulates → transfer of land to creditor on default; a feedback arrow returns from “larger share of next harvest sold” to “shortfall in the household’s own grain”
Notice what this does to the closed nutrient loop of Fig. 6.3-1. The arrow leaving the village — produce that must go out — grows much larger, while nothing new enters to replace it.
6.4.2 Commercial Crops for Export and for British Industry
The second change was in what the land was asked to produce. Britain was industrialising, and its mills and its trade required raw materials that Indian soil could supply.
Indigo, grown for dye in Bengal and Bihar, was cultivated under advance contracts that obliged the cultivator to plant it on a portion of the best land. Raw cotton was grown in the Deccan and Gujarat for the textile mills of Lancashire; when the American Civil War of the 1860s cut off supplies from the United States, Indian cotton exports and prices rose sharply, and collapsed again as suddenly when that war ended. Jute in Bengal, tea on plantations in Assam and the hills, opium in eastern India for the trade with China, and sugarcane all expanded under the same pull.
Fig. 6.4-2 shows where the main commercial crops were concentrated.
Diagram
Fig. 6.4-2 – outline map of the Indian subcontinent with shaded zones and labels: indigo (Bengal and Bihar), opium (eastern Gangetic plain), jute (lower Bengal delta), tea plantations (Assam and the eastern hills), raw cotton (Deccan plateau and Gujarat), sugarcane (upper Gangetic plain); arrows leading from the ports out of the map labelled “raw materials exported”; a return arrow labelled “manufactured goods imported”
Growing a crop for a distant market is not by itself harmful; farmers everywhere have always sold what they grew. The difficulty lay in the combination of features specific to this arrangement.
Land shifted out of food. Every hectare under indigo, cotton or opium was a hectare not under grain and pulses, in a countryside where most households still needed to eat what they grew.
The cultivator carried the price risk without controlling the price. When the cotton boom broke, the farmer who had committed land, seed and borrowed money to cotton was left holding a crop worth a fraction of what had been expected — and a debt fixed in money terms.
And the trade ran in one direction. Raw material left; manufactured goods returned. Value added to Indian cotton was added in Britain, so the growing did not build the processing industry alongside it that might otherwise have followed.
The pressure occasionally produced open resistance. The refusal of large numbers of cultivators in Bengal to sow indigo at the end of the 1850s brought the system into public controversy and led to an official inquiry, after which indigo cultivation in that region contracted sharply. It is worth recording as a plain historical fact: cultivators were not passive in the face of these arrangements.
6.4.3 Devaluation of Sustainable Traditional Practices
The third change is the least visible and, for this chapter, the most important. The practices described in section 6.3 did not merely go out of fashion; the conditions that made them possible were removed.
Fallowing became unaffordable. A fixed cash demand every year makes resting land for a season an expense the household cannot meet, so fallows shortened and in many places disappeared.
Manure supply fell. Large areas of forest and grazing land were brought under state control as reserved forest, and village commons shrank. Cattle need fodder from somewhere; where grazing land contracted, cattle numbers and dung supply contracted with them, and the manure that had sustained fertility grew scarcer exactly as cropping intensified.
Local water systems decayed. Tanks, ahars and pynes had been maintained by collective village labour under arrangements that depended on customary obligation. As revenue arrangements and land rights were recast, and as large canal works became the state’s preferred form of investment, many of these systems lost the shared upkeep that kept them desilted and functioning. The structures often survived; the maintenance did not.
Diversity narrowed. A field committed to a single commercial crop has no room for the mixtures and rotations that had spread risk and restored nitrogen.
The result was a squeeze from both ends. More was being taken out of the soil each year, and less was going back in. By the closing decades of the nineteenth century, yields in many regions had stagnated or fallen, and the cultivator carried a debt burden that made investment in the land nearly impossible.
Where historians disagree
This account should not be given as though it were settled. Several points are genuinely disputed.
The colonial period also saw large investments that raised output — the railway network, which moved grain from surplus to deficit regions, and the great canal systems of the Punjab, which turned dry land into some of the most productive farmland in the subcontinent. Some historians argue that commercialisation raised incomes for cultivators in the better-watered and better-connected districts, and that the picture of uniform decline does not fit the regional evidence. Others reply that these gains were concentrated in a few areas and among larger holders, and that the aggregate record — stagnant food grain output per head in the first half of the twentieth century, and repeated famine — is the more telling measure.
What is not in dispute is the direction of the structural changes: cash revenue, transferable land, expanded commercial cropping, and a weakened base of common fodder, fuel and water resources.
6.4.4 The Bengal Famine
The most severe agricultural crisis of the colonial period in India occurred in Bengal in 1943, during the Second World War.
The famine is studied here for a structural reason, not for its scale alone. Every element of the preceding sections appears in it: a population dependent on purchasing food rather than growing it, a supply chain that could be cut, an administrative system slow to recognise what was happening, and a price mechanism that allocated the available grain to those who could pay most.
6.4.5 Pre-colonial, Colonial and Post-colonial Agriculture Compared
It helps to set the three periods side by side before moving on. The third column looks ahead to sections 6.5 to 6.7, and you may want to return to this table once you have read them.
Two cautions before leaving this table. The first is that the middle column describes a direction of change, not a uniform experience: districts differed enormously, and the same policy produced prosperity in one place and dispossession in another. The second is that the third column is not simply a continuation of the second. Its purpose was different — to end dependence on imported grain — and by that measure it succeeded on a scale nothing before it approached. What it cost, and who paid, is the argument of sections 6.6 and 6.7.
6.5 Indian Agriculture at Independence
6.5.1 Food Scarcity and Dependence on Food Imports
In 1947 India inherited an agricultural economy that had to feed a population of roughly 350 million from land whose yields had barely risen in decades. Partition made the arithmetic worse in a specific way: a large share of the canal-irrigated wheat land of the Punjab, and most of the jute-growing districts of Bengal, now lay across the new border, while the mills that processed jute and much of the population that ate the wheat did not.
Yields were the central problem. Wheat across most of India yielded well under a tonne per hectare, and rice little better. The land under cultivation could still be extended somewhat, but not indefinitely, and the population was growing every year.
It is worth doing the arithmetic yourself, because it explains everything that followed.
A rough sum that shaped policy
Take the population around 1951 as 360 million. Suppose each person needs, as a round working figure, 180 kg of food grain a year — for direct eating, plus seed, plus the losses that occur between field and plate. The total requirement is then
\[\text{Requirement} = 360 \times 10^{6} \times 180\ \text{kg} = 6.48 \times 10^{10}\ \text{kg} = 64.8\ \text{million tonnes}\]
against a national output in that period of roughly 50 million tonnes. Two conclusions follow at once. There is a gap of the order of 15 million tonnes. And because the population is rising, the gap widens every year unless production rises faster than the population does.
The gap was closed by importing grain. From the mid-1950s India bought wheat from the United States under an American law usually referred to as PL-480, which allowed purchase in Indian rupees rather than in scarce foreign currency. Imports grew through the following decade. When the monsoon failed badly in two successive years in the mid-1960s, and harvests fell sharply, imports rose to around ten million tonnes.
Fig. 6.5-1 shows the shape of that period: production creeping upward, punctuated by two deep dips, and imports rising to fill the difference.
Diagram
Fig. 6.5-1 – line graph, x-axis years 1950 to 1968, y-axis quantity in million tonnes (0 to 100); upper line labelled “food grain production” rising gradually with two sharp downward spikes at the consecutive drought years of the mid-1960s; lower line labelled “net imports of food grain” rising unevenly across the period and peaking at the same drought years at about 10 million tonnes; the two drought years marked with a vertical dashed band
That dependence had consequences beyond the food itself. A country buying a large part of its grain from abroad each year has less room to disagree with the supplier about anything else, and the arrangement can be slowed or reviewed at short notice. Whatever view one takes of the politics of the period, the structural point is not in dispute: importing food on that scale, year after year, was a position no government wanted to occupy.
6.5.2 The Need for Increasing Production
Any increase in output can come from only two sources. Production equals area multiplied by yield:
\[P = A \times Y\]
where \(P\) is total production in tonnes, \(A\) is the area under the crop in hectares, and \(Y\) is the yield in tonnes per hectare. Raise either factor and \(P\) rises.
By the 1950s the first factor had little room left. The second had a great deal — Indian yields were far below what the same crops achieved elsewhere. So the question became a technical one: what would make a hectare of Indian wheat or rice produce three or four times what it was producing?
Two answers were pursued in parallel, and both are needed to understand the next three sections.
The first answer was institutional. The land had to be held in a way that gave the person cultivating it a reason to invest in it. A tenant who may be evicted next season, or who hands over half the crop to a landlord, gains little from digging a well or adding manure. Reforming who owned land and on what terms was therefore not a side issue but a precondition for raising output — this is the need for land reform, and section 6.8 takes it up in full.
The second answer was technological. If the plant itself could be redesigned to respond to fertilizer and water by producing more grain, then yield could be raised on the land already cultivated. That was the promise of the Green Revolution, and it is the subject of section 6.6.
6.6 The Green Revolution
6.6.1 Origin and Spread
The Green Revolution is the name given to the sharp rise in cereal yields that followed the introduction, from the 1960s onwards, of specially bred high yielding varieties grown with assured irrigation, chemical fertilizers and pesticides.
Its scientific origins lie outside India. From the 1940s, a wheat breeding programme in Mexico led by the American plant scientist Norman Borlaug worked on two problems at once: resistance to the fungal disease known as wheat rust, and the tendency of tall wheat plants to fall over when heavily fertilized. The solution to the second problem came from dwarfing genes carried by a Japanese wheat, which Borlaug’s programme crossed into its own lines. Borlaug received the Nobel Peace Prize in 1970 for this work.
Parallel work on rice was carried out at the International Rice Research Institute in the Philippines, established in 1960. Its semi-dwarf variety IR8, released in 1966, became the most widely known of the new rices.
The phrase “Green Revolution” itself was coined in 1968 by an American official, William Gaud, to describe what these varieties were doing to harvests across Asia.
India entered this stream in the mid-1960s, in the middle of the food crisis described in section 6.5. Mexican semi-dwarf wheats, including the varieties Lerma Rojo and Sonora 64, were imported and tested, and Indian breeders soon released varieties bred from them, such as Kalyan Sona and Sonalika. The geneticist M. S. Swaminathan was central to this effort.
Notice the sequence in that account. The seed came first in the story, but it could not have worked alone. The Green Revolution was a package, and each part of the package is a “basic principle” the syllabus asks you to know.
6.6.2 Development of High Yielding Varieties
Why should a short plant yield more grain than a tall one? The answer is the single most useful idea in this section, and it is not about the plant growing more, but about where what it grows ends up.
A wheat or rice plant divides the material it manufactures between grain and everything else — stem, leaves and roots. The proportion going into grain is called the harvest index.
A tall traditional variety puts a large share of its growth into straw. Feed it heavy doses of nitrogen and it responds by growing taller still, until the stem can no longer carry the weight of a wet grain head and the crop lodges — falls flat before harvest. The extra fertilizer produces extra straw and a ruined field.
A semi-dwarf variety has short, thick, stiff stems. Given the same nitrogen, it cannot grow much taller, so the additional growth goes into the grain head instead. Its harvest index is substantially higher, and it stands up under the weight. Compare the two plants in Fig. 6.6-1.
Diagram
Fig. 6.6-1 – two wheat plants drawn side by side against a common vertical scale in centimetres; left plant tall (about 130 cm) with a thin stem and a small grain head, a dotted duplicate beside it shown lodged flat on the ground and labelled “lodging under heavy fertilizer”; right plant semi-dwarf (about 80 cm) with a thick stiff stem and a large grain head, standing upright; below each, a pie fraction showing the split between grain and straw, labelled “harvest index”, clearly larger for grain in the semi-dwarf
A high yielding variety is therefore not a plant that grows more in poor conditions. It is a plant designed to convert added fertilizer and water into grain rather than into straw. This is why the earlier warning matters: without the fertilizer and the water, the design has nothing to convert, and a local variety adapted to the place may well do better.
Two entries in that table deserve a second look, because they are usually forgotten when the Green Revolution is summarised as a success.
Less straw means less fodder. A household that keeps cattle for milk, draught power and dung is not indifferent to the loss, and where fodder becomes scarce, cattle numbers fall, and with them the supply of farmyard manure.
Shorter duration means a second crop becomes possible in the same year. That is a genuine gain in output, but it also means the soil gets no rest at all, and the demand for irrigation water roughly doubles.
6.6.3 Introduction of Fertilizers and Pesticides
The second element of the package supplies what the new plants were designed to use.
Nitrogen is the nutrient that limits cereal yield most often, and the quantities the new varieties could use were far beyond what farmyard manure could supply. Chemical fertilizers — urea for nitrogen, phosphatic fertilizers for phosphorus, and potassic fertilizers for potassium — deliver nutrients in concentrated, immediately available form. Their manufacture and distribution were expanded and subsidised, because without them the seed was of little use.
The third element is pest control. Concentrating one crop, of one variety, over a large area creates ideal conditions for the insects and fungi that specialise in it. Densely planted, heavily fertilized, well-watered fields are also attractive to pests, and the new varieties carried resistance to only the specific diseases bred into them. Pesticides were therefore adopted alongside, and their use rose in step with fertilizer use.
There is an important asymmetry here that section 6.7 develops. Fertilizer stays broadly where it is put and its main problems appear in the soil and in water bodies downstream. Pesticides are designed to kill, do not distinguish neatly between target and non-target organisms, and move through food chains. The two inputs are not equivalent in their environmental effects.
Fig. 6.6-2 shows the package as a system rather than a list.
Diagram
Fig. 6.6-2 – system diagram: five input boxes arranged around a central field — “high yielding seed”, “assured irrigation”, “chemical fertilizer”, “pesticide”, “credit and assured procurement price” — each with an arrow into the centre box labelled “high yield per hectare”; a caption arrow at the side showing that removing any one input sharply lowers the output, with the note “the package works as a whole”
6.6.4 Mono Cropping
The fourth principle is a consequence of the other three rather than a choice made separately.
Mono cropping is the practice of growing the same single crop on the same land season after season, over a large area. Where the whole area is also sown to the same variety, the uniformity is complete.
Once a farmer has irrigation, a variety bred to respond to fertilizer, a guaranteed buyer for that specific grain and a debt to service, the incentive to plant anything else nearly disappears. Pulses, coarse grains and oilseeds do not carry the same assurance, and mixing crops in one field complicates machinery, fertilizer scheduling and spraying.
The uniformity is exactly what makes the system efficient. A single crop can be sown, irrigated, sprayed and harvested by one set of operations on one timetable. It is also exactly what makes the system fragile, for a reason that should now be familiar: a field with one plant type in it offers no internal buffer. If a new pest race or disease strain appears that this variety cannot resist, everything in the area is equally exposed at the same moment.
Sections 6.3.2 and 6.4.2 have already traced this movement — from many crops and many varieties towards one. The Green Revolution completed it in the regions where it took hold. Whether the harvest justified the loss is the argument of the next section.
6.7 A Critical Appraisal of the Green Revolution
No change in Indian agriculture has been argued about as long or as sharply as this one. The argument is worth conducting carefully, because both sides have strong evidence and both are describing real things.
The case for is short and very powerful. A country that was importing grain each year to avoid shortage stopped doing so. Wheat production rose several-fold, buffer stocks replaced shipments, and the mass famines that had recurred through the preceding two centuries did not recur. Whatever else is said in this section, that has to stay in view.
The case against is not that these gains were imaginary. It is that they were bought at costs which were not counted at the time, and which fell on different people, different places and different generations from those who received the gains. The syllabus asks you to weigh six specific costs. Take them one at a time.
6.7.1 Agro-bio Diversity
Agro-biodiversity is the variety of crops, crop varieties, livestock breeds and associated organisms that make up an agricultural system.
Section 6.3.2 described a countryside holding thousands of rice landraces, each adapted to a particular soil, water regime and season. Within a few decades, in the regions where the new package took hold, a handful of varieties replaced most of them. This loss is called genetic erosion — the disappearance of genes and varieties from the cultivated pool.
Why does it matter, if the replacements yield more? Two reasons, and they are different in kind.
The first is present vulnerability. A large area sown to one variety is uniformly susceptible to whatever that variety cannot resist. In 1970 a leaf blight swept through maize in the United States and destroyed a significant share of the national crop, because a particular cytoplasmic character used to make hybrid seed production easier was present in most of the maize planted — millions of hectares shared the same weakness. The uniformity that had made hybrid seed cheap to produce made the whole crop fail together.
The second is future breeding. Every new variety a breeder makes is built out of genes that already exist somewhere. Resistance to a disease that appears in 2040 will have to be found in some plant that carries it — most likely a landrace or a wild relative that nobody currently grows for yield. A landrace that is no longer sown anywhere is not merely out of use; its genes are gone.
The honest counter-argument should be recorded too. The new varieties were themselves built from diverse ancestry, and organised conservation — gene banks, breeding collections, farmer seed networks — has preserved a large part of what left the fields. Diversity has shifted from being maintained in farming to being maintained for farming, which is not the same thing and not necessarily fatal, but does concentrate responsibility in a small number of institutions.
6.7.2 Soil Health
Soil is not simply a medium holding up plants. It is a living system, and continuous intensive cropping strains it in four ways that are worth distinguishing.
The first is loss of organic matter. Section 6.3.3 traced how farmyard manure returned carbon and nutrients to the soil. Where chemical fertilizer replaced it and short-strawed varieties left less residue, the organic content of the soil fell. Organic matter is what holds moisture, binds soil particles into stable crumbs and feeds soil organisms; when it declines, the soil compacts, takes in water less readily and erodes more easily.
The second is nutrient imbalance. Fertilizer use concentrated heavily on nitrogen, less on phosphorus and potassium, and hardly at all on micronutrients. Crops removed micronutrients such as zinc year after year and nothing replaced them, so deficiencies appeared in soils that had never shown them before.
The third is over-irrigation. Where more water is applied than the crop and the drainage can handle, the water table rises towards the surface, and the land becomes waterlogged. Where that shallow water evaporates, it deposits its dissolved salts in the root zone, and the soil becomes saline. Both problems are worst in canal command areas with poor natural drainage.
The fourth is the opposite problem, in the tube well districts. Where groundwater is pumped faster than the monsoon replenishes it, the water table falls year after year. Shallow wells go dry, deeper bores are sunk, pumping costs rise, and in some regions the water reached at greater depth carries dissolved salts or other contaminants.
Note that these four are not four separate accidents. All follow from the same decision: to take two or even three crops a year off land that previously got a rest, using a nutrient source that supplies some elements and not others.
6.7.3 Ecological Impact of Pesticides
A pesticide is designed to be poisonous. Its usefulness depends on being poisonous mainly to the target, and on not persisting once the job is done. Where either condition fails, the effects spread well beyond the field.
Bioaccumulation is the build-up of a persistent chemical in the tissues of an organism, because it is taken in faster than the body can break it down or excrete it. Fat-soluble compounds are the usual offenders, since they lodge in body fat rather than passing out in urine.
Biomagnification is what happens next. Each organism in a food chain eats many organisms from the level below, and takes in their accumulated load along with them. The concentration therefore rises at each successive trophic level, so that fish-eating birds may carry many times the concentration found in the water they live above.
Diagram
Fig. 6.7-1 – biomagnification pyramid, four levels drawn as horizontal bands with a concentration axis alongside in mg per kg of body tissue on a rising scale; from bottom: water and plankton (lowest concentration), small fish, large fish, fish-eating bird (highest); each band labelled with a relative concentration value and an arrow showing intake from the level below; caption text on the figure: “concentration rises at each level because each organism eats many of the level below”
The organochlorine insecticide DDT is the standard illustration. It is persistent, fat-soluble and biomagnifies strongly, and its effects on the breeding of fish-eating birds were documented well before its agricultural use was restricted. In India its use is now restricted to disease-vector control rather than agriculture.
Three further effects operate inside the field itself.
Pest resistance develops because a spray never kills every individual. The few that survive are those that happened to tolerate it, and they are the ones that breed. Within a few generations the population is dominated by their descendants, and the dose that worked last season no longer works.
Pest resurgence occurs because a broad-spectrum spray kills the pest’s natural enemies along with the pest — and predators, being fewer and slower to reproduce, recover more slowly than their prey. The pest population can therefore rebound to a higher level than before the spraying.
A secondary pest outbreak occurs when an insect that was never a serious problem, because predators kept it in check, is released by those same sprays and becomes a major pest in its own right.
Put these together and you get the pattern drawn in Fig. 6.7-2, sometimes called the pesticide treadmill: each round of spraying creates the conditions requiring the next, at higher dose and higher cost.
Diagram
Fig. 6.7-2 – closed causal loop with five nodes arranged in a circle, arrows running clockwise: “pesticide applied” → “susceptible pests and natural enemies both killed” → “resistant pest survivors breed; predators slow to recover” → “resurgence and secondary pest outbreak” → “higher dose or new pesticide needed” → back to “pesticide applied”; cost and dose shown rising on a small side arrow beside the loop
Finally, there is direct human exposure. The people at greatest risk are those who mix and spray the chemicals, often without protective equipment, and residues reaching consumers are the reason food safety standards set limits on them.
6.7.4 Energy Use and Input Costs
Traditional agriculture ran largely on current sunlight — photosynthesis in the field, fodder into bullocks, dung back to the soil. Modern agriculture runs substantially on fossil energy, and it is worth being specific about where that energy enters.
Nitrogen fertilizer is manufactured by combining atmospheric nitrogen with hydrogen at high temperature and pressure, using natural gas both as the source of hydrogen and as fuel. It is among the more energy-intensive industrial products in common use. Irrigation pumping runs on diesel or on electricity. Tractors, threshers and transport run on diesel. Pesticides are synthesised from petrochemical feedstocks.
The consequence is an inversion. A pre-industrial farming system returned considerably more food energy than the energy put into it. An intensively fertilized, irrigated, mechanised system may return little more than it consumes, and on some accounts less — the extra grain is bought with fossil fuel.
This shows up in the farmer’s account book as cost, and the structure of that cost matters more than its size.
What happens to a farmer’s margin when yield slips
Take an illustrative hectare of irrigated wheat. Suppose the costs for one season are:
- seed ₹3,000
- fertilizer ₹12,000
- pesticide ₹4,000
- irrigation and diesel ₹8,000
- machinery hire ₹12,000
- hired labour ₹15,000
Total cost per hectare is
\[C = 3{,}000 + 12{,}000 + 4{,}000 + 8{,}000 + 12{,}000 + 15{,}000 = ₹54{,}000\]
Suppose the yield is 4.5 tonnes per hectare and the price received is ₹20,000 per tonne. Then
\[R = 4.5 \times 20{,}000 = ₹90{,}000 \qquad \text{and} \qquad \text{margin} = 90{,}000 - 54{,}000 = ₹36{,}000\]
Now suppose the yield falls by 20 per cent, to 3.6 tonnes per hectare — an ordinary bad season, not a disaster.
\[R = 3.6 \times 20{,}000 = ₹72{,}000 \qquad \text{and} \qquad \text{margin} = 72{,}000 - 54{,}000 = ₹18{,}000\]
The yield fell by a fifth; the margin fell by a half. The reason is that almost the entire cost was committed months before the harvest and does not fall when the harvest does. This is the arithmetic behind agricultural debt, and it is the same structural point met in section 6.4.1, where a fixed cash obligation met a variable harvest. The obligation is now owed to input dealers and lenders rather than to a revenue collector, but it is just as fixed.
(The figures above are illustrative round numbers chosen to show the relationship, not current market values.)
6.7.5 Reach: Small and Medium Farmers
The new technology was, in one sense, neutral about the size of a holding. A semi-dwarf seed grows in the same way on one hectare as on twenty, and small farmers across the wheat and rice belts adopted the varieties in very large numbers. On the evidence, the seed itself was not the barrier.
The barriers were the rest of the package. A tube well is a fixed cost that a large holding spreads over many hectares and a small one cannot. Institutional credit was easier to obtain against a large holding, so smaller farmers borrowed at higher cost elsewhere. A tenant cultivating someone else’s land had less security and less reason to invest. And a household with no reserves cannot risk a season’s cash on inputs, because one failure ends its ability to farm at all.
Two consequences followed.
The first is regional. Gains concentrated where assured irrigation already existed — Punjab, Haryana, western Uttar Pradesh, and later specific irrigated districts elsewhere. Large rain-fed regions growing coarse grains and pulses, in central and eastern India, received comparatively little, because the package could not work without water. Differences between regions widened.
The second is between households within a region. Those able to finance the package captured most of the gain, and the gap between them and those who could not grew wider.
Against this, one clear gain for the poorest should be recorded. The new cropping pattern needed far more labour — more irrigation, more weeding, more harvesting, and two or three crops a year instead of one. Demand for agricultural labour rose, wages in the intensively cropped districts rose with it, and workers migrated there from poorer regions in large numbers. Landless labourers, who owned nothing to invest, benefited through the labour market rather than through the harvest.
6.7.6 Community and Household Level Food Security
The most important gap in the record is between the national picture and the household one.
At the national level, the achievement is not in doubt: enough grain, produced domestically, with stocks to draw on in a bad year. At the household level, three complications intervene.
Grain in a government godown is not food on a plate. A household eats what it can grow or buy, and buying requires income. If the price of grain is stable and a landless household’s wage is not, the household can be hungry in a year of record harvest — precisely the mechanism that operated in the Bengal famine described in section 6.4.4.
The composition of what is produced also changed. Land shifted from pulses and coarse grains towards wheat and rice, because those were the crops with new varieties, assured irrigation and guaranteed purchase. Pulses are the main source of protein in most Indian diets and are largely grown on rain-fed land, so their availability per person did not keep pace with population. Coarse grains such as millets, which are drought-tolerant and nutritionally rich, lost area to the favoured cereals. A diet can therefore become more secure in calories and less secure in protein and micronutrients at the same time.
Finally, the community-level effects are mixed. More labour demand raised wages; loss of common grazing land and less crop residue for fodder reduced what a landless household could keep in the way of livestock. Whether a particular village came out ahead depended on which of these effects was larger there.
6.7.7 The Balance Sheet
The point of an appraisal is not to arrive at a verdict but to be able to state both columns accurately, and to say which column a given piece of evidence belongs in.
One closing point about how to reason here. It is not a defence of the Green Revolution to say that critics ignore the famines that did not happen, and it is not a refutation of it to list the soils that were damaged. A fair appraisal asks a harder question: which of these costs were unavoidable consequences of raising yields at all, and which followed from how it was done — from subsidising nitrogen but not organic matter, from guaranteeing a price for two cereals and not for pulses, from extending credit against land rather than against need?
That question has a practical edge, because it is what section 6.9 is about. If the costs came from the design rather than from the goal, the design can be changed.
6.8 Land Reform
6.8.1 Why Land Reform Was Needed
Section 6.5.2 introduced the point briefly: raising output is not only a question of better seed, but of who holds the land and on what terms. This section takes that up properly.
Land reform is the deliberate change, by law, of the ownership and tenancy arrangements under which agricultural land is held and cultivated.
At independence, the structure inherited from the settlements described in section 6.4.1 had four features that stood in the way of both output and equity.
The first was the presence of intermediaries. Over large areas, the person who paid revenue to the state was not the person who ploughed the field. Between them stood one or more layers of rent-collecting right-holders who neither cultivated nor invested in the land.
The second was insecurity of tenancy. Tenants could often be evicted at the landholder’s discretion, and paid rent as a share of the crop — frequently half or more of it. Ask yourself what such a tenant gains by digging a well, levelling a field or adding manure. Half the benefit goes to someone else, the whole cost is his own, and the improvement may be the very reason he is evicted next season and the land let to someone else at a higher rent.
The third was concentration. A large share of land was held by a small number of households, while a large number cultivated tiny plots or none at all.
The fourth was fragmentation. Through repeated inheritance, a single household’s holding was often scattered as several small strips in different parts of the village, so that time was lost moving between them and irrigation or machinery was impractical on any one of them.
6.8.2 Advantages Claimed for Land Reform
Land reform in India was pursued through four measures, each aimed at one of those four problems.
Three advantages were claimed for these measures, and each rests on a distinct argument.
The first is the incentive argument. A cultivator who owns the land, or holds it securely at a regulated rent, keeps the returns from any improvement made to it and therefore has a reason to make one. Investment in wells, bunds, levelling and manure should rise. This is the argument that links land reform directly to the yield problem of section 6.5.
The second is the efficiency argument, and it is more surprising than students usually expect. Indian farm data have repeatedly shown an inverse relationship between the size of a holding and output per hectare: small farms tend to produce more per hectare than large ones, mainly because family labour is applied intensively and carefully to a small area. If that relationship holds, redistributing land from very large holdings to small cultivators raises total production rather than lowering it. Fig. 6.8-1 shows the shape of the relationship.
Diagram
Fig. 6.8-1 – line graph, x-axis farm size in hectares (0 to 20), y-axis output per hectare in tonnes per hectare (0 to 5); curve starting high at small farm sizes and declining, steeply at first and then flattening, as size increases; individual data points scattered around the curve to show it is a tendency, not an exact law; axis note “each point represents one holding”
The third is the equity argument. Land in an agrarian economy is not only a productive asset. It is security against hunger, collateral for credit, a claim on village standing, and something to fall back on when wage work disappears. Redistributing it changes a household’s position in all of these at once.
6.8.3 Successes and Failures
The record is genuinely mixed, and the two halves have to be stated separately rather than averaged into a verdict.
Where it worked
Abolition of intermediaries is the clearest success. It was carried through in most states within the first two decades after independence, ending the rent-collecting layers over a very large area and placing millions of cultivators in a direct relationship with the state. Whatever else remained undone, this part did not.
Consolidation of holdings worked well where it was pursued seriously, particularly in Punjab, Haryana and western Uttar Pradesh. Compact blocks made tube well irrigation and machinery practical — one of the reasons those states were positioned to adopt the Green Revolution package when it arrived.
Tenancy reform succeeded where it was pursued with sustained administrative effort. Kerala abolished tenancy and conferred ownership rights on tenants on a large scale. West Bengal, through a programme begun in 1978 that registered sharecroppers and recorded their rights, gave a large number of them security of tenure and a fixed share of the crop; recorded output on those plots subsequently rose. What both states show is that the decisive variable was not the wording of the statute — which was broadly similar elsewhere — but whether the administration actually identified and recorded the cultivators on the ground.
Where it did not
Ceiling legislation is the clearest failure. Very little land was declared surplus relative to expectations, and less was actually distributed. Three reasons account for most of the shortfall.
Ceilings were widely applied to the individual rather than to the household in the early laws, so holdings were divided among family members on paper and no surplus appeared. Land was also transferred to relatives and to fictitious owners in advance of the legislation.
Substantial exemptions were written into the laws — for plantations, orchards, specialised farms and religious or charitable endowments — and land was reclassified to fit them.
Land records were incomplete and out of date, so establishing who held what, and how much, was often impossible. A ceiling law cannot bite on land the state cannot identify.
Tenancy reform failed in a subtler way in most states. Where laws threatened landowners with losing land to a recorded tenant, tenancy did not disappear — it went unrecorded. Leasing continued orally, with no written trace, which left the tenant with less security than before, not more, and no access to institutional credit or crop insurance.
The unsettled argument
There is a genuine policy debate here, and it should be presented as a debate.
One position holds that the ceiling and tenancy laws were right in principle and failed only in execution: with better land records and firmer administration, redistribution would deliver both the equity gain and the productivity gain that the inverse size–output relationship predicts.
The other holds that restrictions on leasing have themselves become the problem. If a smallholder cannot legally lease land in, or an elderly owner cannot safely lease land out, land sits idle or is farmed by whoever holds title rather than whoever farms best — and the people most hurt are the landless, for whom leasing in land is the only realistic route to cultivating any. On this view, recording and legalising tenancy would help tenants more than restricting it ever did.
Both positions accept the same evidence about what happened. They differ on what should be done next, and the disagreement is unresolved.
6.9 Elements of Sustainable Agriculture
Section 6.7 ended with a question: were the costs of intensive agriculture unavoidable, or did they follow from how it was done? The elements collected in this section are the practical answer worked out over the past few decades. None of them is new — several are refinements of what section 6.3 described — but they are now applied deliberately, with an understanding of why they work.
Read them as a set of tools rather than a creed. A farm rarely adopts all of them, and each carries its own trade-off between yield, labour, risk and cost.
6.9.1 Mixed Farming
Mixed farming is the practice of raising crops and livestock together on the same farm, so that each supports the other.
The logic is the nutrient loop of Fig. 6.3-1, restored on purpose. Crop residues and fodder crops feed the animals; the animals return dung and urine to the fields as manure; milk, eggs, wool or draught power provide an income that does not depend on the grain harvest.
That last point is the one usually overlooked. A household selling milk every week has cash coming in continuously, whereas a household selling only grain has income twice a year and expenses throughout. The steadiness matters as much as the amount.
The costs are labour and land. Animals need daily attention regardless of the season, and fodder occupies land that could carry a saleable crop. Where fodder is scarce, mixed farming becomes hard to sustain — which is precisely what happened where short-strawed varieties reduced the residue available.
6.9.2 Mixed Cropping
Mixed cropping is the growing of two or more crops together on the same field in the same season, without a definite row pattern.
Its purpose is insurance. If the rain stops early, the drought-tolerant component survives; if a pest attacks one crop, the other is unaffected; if one price collapses, the other may hold. The farmer accepts a lower yield of any single crop in exchange for a much lower chance of harvesting nothing at all. Wheat sown with gram, or bajra with moth bean, are familiar examples.
6.9.3 Inter-cropping
Inter-cropping is also the growing of two or more crops together, but in a definite row arrangement — for instance, two rows of one crop alternating with one row of another.
The purpose is different from mixed cropping, and this is where students most often lose marks. Inter-cropping aims to raise total output from a unit of land by making the crops use different resources rather than compete for the same ones. A deep-rooted crop with a shallow-rooted one exploits two layers of soil. A tall crop with a shade-tolerant short one uses two layers of light. A legume with a cereal supplies part of the cereal’s nitrogen.
Because the rows are defined, each crop can be fertilized, weeded and harvested on its own schedule — which is impossible when the seeds are broadcast together.
Diagram
Fig. 6.9-1 – three field plots drawn in plan view, each the same size; (a) monoculture — uniform rows of a single crop symbol; (b) mixed cropping — two crop symbols scattered irregularly through the plot with no row structure; (c) inter-cropping — a repeating pattern of two rows of crop A alternating with one row of crop B, with the 2:1 ratio marked; below each plot, a one-line label stating its main purpose: maximum yield of one crop / insurance against failure / higher total output per unit area
6.9.4 Crop Rotation
Crop rotation is the practice of growing different crops on the same field in a planned sequence over successive seasons, rather than the same crop repeatedly.
It does four things at once, and each is worth stating separately because each addresses a different problem raised in section 6.7.
It restores nitrogen, where a legume is included in the sequence — the same root-nodule mechanism met in section 6.3.3, now used deliberately.
It draws nutrients from different depths, because crops with deep and shallow root systems do not mine the same layer of soil year after year.
It breaks pest and disease cycles. Many soil-borne pests and pathogens are specific to one crop, and a season with no host plant present starves them out. This is a control method that costs nothing and cannot be developed resistance against.
It spreads risk across the year and across markets, in the same way mixed cropping spreads it within a season.
Diagram
Fig. 6.9-2 – circular rotation diagram divided into three sectors for three successive seasons: sector 1 “cereal — heavy nitrogen demand”; sector 2 “legume — fixes nitrogen, restores soil”; sector 3 “oilseed or root crop — different rooting depth, breaks pest cycle”; an inner ring showing soil nitrogen status falling in sector 1, rising in sector 2, steady in sector 3; arrows running clockwise back to sector 1
6.9.5 Sustainable Water Management
Section 6.2 covered the delivery methods; what matters here is the principle behind choosing between them. Sustainable water management means applying water where the plant can use it, keeping it in the soil once applied, and not withdrawing more from a source than it receives.
Four practices carry most of this.
Micro irrigation — drip and sprinkler — cuts what is lost to evaporation, run-off and percolation past the root zone.
Mulching covers the soil surface with crop residue, straw or leaves, which slows evaporation from the soil, moderates its temperature and suppresses weeds at the same time.
Levelling a field so that water spreads evenly prevents the pattern in which the low end is waterlogged while the high end stays dry — the same volume of water then irrigates the whole plot properly.
Recharge structures of the kind described in section 6.2.4 return water to the aquifer that wells draw from, which is the only way pumping can continue indefinitely.
Behind all four sits one test. Compare what is withdrawn from a groundwater source in a year with what the monsoon returns to it. If withdrawal exceeds recharge, no efficiency at the field level makes the system sustainable — it only makes the decline slower.
6.9.6 Sustainable Soil Management
The aim here is to keep soil fertility being rebuilt rather than only being drawn down and topped up. Three inputs do the rebuilding, and they work in genuinely different ways — a distinction the syllabus asks you to be able to make.
6.9.6.1 Organic Fertilizers
An organic fertilizer is a material of plant or animal origin, applied to the soil, which supplies nutrients as it decomposes.
Two standard examples are farmyard manure — cattle dung and urine composted with bedding and crop residue — and vermicompost, in which earthworms are used to break down organic waste into a fine, nutrient-rich material.
Their nutrient concentration is low compared with chemical fertilizer, so large quantities are needed. Their real contribution is not the nutrients at all but the organic matter: it improves soil structure, water-holding capacity and the population of soil organisms, none of which a bag of urea does.
6.9.6.2 Bio-fertilizers
A bio-fertilizer is a preparation containing living micro-organisms which, when applied to seed or soil, increases the supply of nutrients to the plant.
Two examples make the mechanism clear. Rhizobium is the bacterium that lives in the root nodules of legumes and converts atmospheric nitrogen into a form the plant can use; seed of a pulse crop is often coated with it before sowing. Blue-green algae, and the small floating fern Azolla which harbours a nitrogen-fixing partner within it, perform the same service in flooded rice fields.
The essential point is that a bio-fertilizer does not itself contain nutrients in any quantity. It contains organisms that go on producing or releasing nutrients, which is why a small quantity can affect a whole field, and why it stops working if the organisms die.
6.9.6.3 Green Manure
Green manure is a crop grown specifically to be ploughed back into the soil while still green, in order to add organic matter and nutrients.
Two commonly used green manure crops in India are dhaincha (Sesbania) and sunn hemp (Crotalaria juncea). Both are legumes, so they bring in nitrogen from the air while growing, and both produce a large quantity of soft green material that decomposes quickly once turned in.
The cost is explicit and worth naming: a season, or part of one, in which the land produces nothing to sell. Green manuring is an investment in next year’s crop paid for out of this year’s, which is why it is practised most where the following crop is valuable enough to justify it.
6.9.7 Sustainable Pest Management
Section 6.7.3 described the treadmill that broad-spectrum spraying sets in motion. Sustainable pest management is the attempt to step off it — not by abandoning pest control, but by changing the target from eliminating pests to keeping them below the level at which they cause economic loss.
6.9.7.1 Bio Pesticides
A bio pesticide is a pest control agent derived from a living organism or a natural product, rather than synthesised as an industrial chemical.
Neem-based preparations, made from the seeds of the neem tree, disturb the feeding and development of many insects. Preparations of the soil bacterium Bacillus thuringiensis produce a protein toxic to specific groups of caterpillars but harmless to most other organisms — the same bacterium whose gene was transferred into cotton in section 6.1.5. The fungus Trichoderma is used against soil-borne plant diseases.
Their advantage is selectivity and rapid breakdown: they hit a narrow range of organisms, spare natural enemies, and do not persist long enough to biomagnify. Their limitations are equally real. They act more slowly than a chemical spray, need to be applied at the right stage of the pest’s life cycle, and being living preparations, they lose effectiveness in storage and in strong sunlight. A farmer watching a crop being eaten needs something that works today, and this is the honest reason bio pesticides have spread more slowly than their environmental case would suggest.
6.9.7.2 Integrated Pest Management
Integrated Pest Management (IPM) is the coordinated use of several pest control methods, chosen on the basis of monitoring, so that pest populations are held below the level of economic damage with the least possible use of chemical pesticides.
The idea that organises the whole strategy is the economic threshold level: the pest density at which the value of the damage being caused begins to exceed the cost of controlling it. Below that level, spraying costs more than it saves.
Diagram
Fig. 6.9-3 – line graph, x-axis time in weeks after sowing (0 to 12), y-axis pest population in number of insects per plant (0 to 20); rising curve of pest numbers; horizontal dashed line partway up labelled “economic threshold level”; a vertical arrow marking the week at which the curve crosses the dashed line, labelled “control action taken here”; the region below the dashed line shaded and labelled “damage costs less than control — no action”
IPM works through four groups of methods, used in this order of preference.
Cultural methods change the conditions the pest needs: crop rotation to starve out host-specific pests, adjusting the sowing date so the vulnerable stage of the crop misses the peak of the pest population, resistant varieties, and destruction of crop residues in which pests overwinter.
Mechanical and physical methods remove pests directly: hand-picking, light traps, pheromone traps that lure male insects using the scent signal females emit, and sticky traps.
Biological methods use the pest’s natural enemies: releasing predatory or parasitic insects, encouraging birds, and applying the bio pesticides just described.
Chemical methods are used last, and used selectively — the narrowest-spectrum chemical that will do the job, applied only after monitoring shows the threshold has been crossed, and rotated between different chemical groups so that resistance builds more slowly.
Notice that IPM does not oppose pesticides. It opposes routine pesticide use, on the calendar rather than on evidence — which is the practice that produced resistance, resurgence and secondary outbreaks in the first place.
6.9.8 Eating Local Foods
The last element concerns the consumer rather than the farmer, and it is the one where the honest answer is most mixed.
Eating local foods means preferring produce grown near where it is eaten, and in its own season, over produce transported long distances or held for months in cold storage. Three arguments support it.
The transport and storage argument: moving food across a country and refrigerating it out of season consumes energy that a locally grown seasonal alternative does not.
The diversity argument: local markets can absorb varieties that never enter long-distance trade — regional millets, local pulses, fruit varieties that do not travel well. A crop with a market is a crop that stays in cultivation, so buying it does more for its survival than any gene bank.
The nutrition and cost argument: produce eaten close to harvest has lost less of its nutritional value, and fewer intermediaries stand between the grower and the price paid.
The counter-argument deserves equal weight, because it is supported by evidence. For most foods, transport is a modest share of the total environmental cost; how the food was produced usually matters far more than how far it travelled. A vegetable grown locally in a heated or heavily irrigated system can carry a larger footprint than the same vegetable grown in a favourable climate and shipped. “Local” is therefore a useful rule of thumb, not a rule.
6.10 Management of Agricultural Produce
A harvest is not food until it reaches someone who eats it. Between the field and the plate, produce can be eaten by insects and rodents, spoiled by moulds and bacteria, broken down by its own enzymes, crushed in transit or left unsold because it could not reach a market in time.
Losses at this stage are not a minor accounting detail. Grain and perishables lost after harvest represent land, water, fertilizer and labour already spent — every hectare’s worth of loss must be made up by farming another hectare. Reducing post-harvest loss is therefore one of the cheapest ways of increasing the food actually available, which is why this section belongs in a chapter on sustainability rather than in a chapter on trade.
What actually spoils food
Four agents do nearly all the damage, and every method in this section is aimed at one or more of them.
Micro-organisms — bacteria, yeasts and moulds — grow on food and break it down. They need moisture, a suitable temperature and time.
Enzymes already present in the food continue to act after harvest, softening fruit, discolouring cut surfaces and turning fats rancid.
Insects, rodents and birds consume stored grain directly and contaminate far more than they eat.
Physical damage — bruising, crushing, sprouting, drying out — opens the way for all three of the above.
Notice the common thread: three of the four are living processes, and living processes need water and warmth. Take away either, and most spoilage stops.
6.10.1 Storage
Storage is the holding of harvested produce in conditions that keep it fit for use until it is needed. Its purpose is not only preservation but timing: a harvest arrives in a few weeks and must feed people for a year, and a farmer who cannot store is forced to sell immediately, when everyone else is also selling and prices are at their lowest.
Safe storage of grain rests on three conditions.
The grain must be dry. Moisture is what allows moulds and insects to multiply, and grain stored above roughly twelve per cent moisture content is at risk regardless of how good the structure is. Sun drying on threshing floors before storage exists for exactly this reason.
The structure must exclude pests and rain. Traditional Indian storage used sealed mud and bamboo bins built inside the house, plastered to keep out insects and rodents. Modern equivalents are metal bins, warehouses and large silos in which grain can be aerated and fumigated.
The stock must be inspected and rotated. Grain lying untouched at the bottom of a stack for years will deteriorate, so stores are managed so that older stock moves out first.
Public storage in India is organised through a national food corporation and central and state warehousing corporations, which hold buffer stocks and the grain distributed through public programmes. A recurring problem in this system is grain held in open stacks on raised platforms under tarpaulin covers, used when covered capacity runs short. It is far cheaper than a warehouse and far more exposed to rain, rodents and damp.
6.10.2 Food Preservation
Food preservation is the treatment of food so that spoilage is slowed or prevented and its edible life is extended.
Every method in this section works by removing one of the conditions that micro-organisms need: a suitable temperature, or available water. Fig. 6.10-1 shows why temperature is such a powerful lever.
Diagram
Fig. 6.10-1 – line graph, x-axis temperature in degrees Celsius (−20 to 120), y-axis relative rate of microbial growth (0 to 100, arbitrary units); curve close to zero below 0 °C, rising slowly from about 5 °C, reaching a peak between roughly 30 °C and 40 °C, then falling steeply and reaching zero above about 70 °C; four zones shaded and labelled along the x-axis: “freezing — growth stopped”, “refrigeration — growth slowed”, “warm range — rapid growth”, “heat treatment — organisms killed”
6.10.2.1 Use of Low Temperatures
Cold does not kill micro-organisms; it slows them down. Chemical and biological reaction rates fall as temperature falls, so both microbial growth and enzyme activity are suppressed.
Refrigeration, at roughly 0 °C to 5 °C, extends the life of milk, vegetables and cooked food from hours to days. Freezing, at about −18 °C, converts the available water to ice so that micro-organisms cannot use it, and holds food for months.
The essential limitation follows from the mechanism. Because the organisms are dormant rather than dead, spoilage resumes as soon as the food warms — which is why frozen food that has thawed should not simply be refrozen, and why a break in the cold chain undoes everything that came before it.
6.10.2.2 Use of High Temperatures
Heat destroys micro-organisms and inactivates enzymes outright, and the amount of heat required depends on what is being destroyed.
Pasteurisation applies moderate heat — for example, holding milk at about 63 °C for half an hour, or at about 72 °C for a few seconds in the high-temperature short-time method — which kills disease-causing organisms and most spoilage organisms without changing the flavour much. Pasteurised milk still requires refrigeration, because heat-resistant spores survive.
Sterilisation applies far greater heat, above 100 °C under pressure, killing spores as well. Milk treated at very high temperature for a few seconds and sealed aseptically can be kept without refrigeration until it is opened.
Blanching is a brief dip in boiling water before drying or freezing, which inactivates the enzymes that would otherwise continue to spoil colour and flavour in storage.
6.10.2.3 Drying
Micro-organisms cannot grow without available water. Drying removes moisture from food until too little is left for them to use.
Sun drying is the oldest form, and still the most widely used: grain on threshing floors, fish on racks, vegetables, chillies and papad laid out in the sun. Mechanical drying uses heated air in a controlled chamber. Spray drying converts liquids such as milk into powder by spraying them into hot air. Freeze drying removes water as vapour directly from the frozen state, which preserves structure and flavour better than any other method and costs a great deal more.
Dried food is light, compact and needs no energy to store — an important advantage in places with unreliable electricity. Its drawbacks are loss of some heat-sensitive nutrients, changes in texture, and the fact that sun drying exposes food to dust, insects and rain.
6.10.2.4 Canning
Canning is the preservation of food by sealing it in an airtight container and heating it sufficiently to destroy the micro-organisms inside.
The order of operations is what makes it work, and it is worth stating as a sequence: the food is prepared and packed into the container, the container is sealed, and the sealed container is then heated. Because nothing can enter after sealing, the food remains sterile until the seal is broken. The process was developed in France in the early nineteenth century by Nicolas Appert, well before anyone understood that micro-organisms were the cause of spoilage.
Canned food keeps for years without refrigeration and travels easily, which is why it dominates emergency and military supply. The costs are the energy used in processing, the weight of the container, and the loss of some heat-sensitive vitamins during heating.
6.10.2.5 Preservation by Salt and Sugar
Salt and sugar preserve food by the same physical mechanism, and it is not that either is poisonous to microbes.
A high concentration of dissolved salt or sugar outside a microbial cell draws water out of the cell by osmosis — water moves from the dilute solution inside to the concentrated solution outside. The cell loses water, shrinks and cannot grow. The water in the food is still present but is no longer available to organisms, which is why this is sometimes described as lowering the water activity of the food.
Salting preserves fish, meat and vegetables, and is the basis of Indian pickles, in which salt is usually combined with oil and spices. Sugar preserves fruit as jam, jelly, murabba and squash, at concentrations of roughly two-thirds sugar by weight in a set jam — below that, the preservative effect weakens.
The limitations are dietary rather than technical. Preserved foods of this kind carry a high salt or sugar load, which is a consideration for anyone who eats them regularly rather than occasionally.
6.10.3 Transportation of Food
Transport is where preservation is most often undone. A perishable that was chilled at the farm and will be chilled at the shop can still be ruined by six hours in a hot vehicle in between.
The cold chain is the unbroken sequence of refrigerated handling that keeps a perishable within its required temperature range from the point of harvest to the point of sale. Fig. 6.10-2 sets out the sequence, and the word “unbroken” is the whole point: the chain is only as good as its weakest link, and a break at any stage cannot be repaired by cooling the produce again afterwards.
Diagram
Fig. 6.10-2 – flow: harvest in field → pre-cooling at collection centre → cold storage → refrigerated transport vehicle → wholesale market → retail chiller → household refrigerator; a temperature band in degrees Celsius shown running alongside the whole sequence; one link drawn with a break in it, marked “break in the cold chain — spoilage begins here and cannot be reversed”
Three constraints shape food transport in India.
Distance and time. Much of the country’s fruit and vegetable production is far from the cities that consume it, and a perishable loses value with every hour spent in transit.
Infrastructure. Road quality, refrigerated vehicle availability and cold storage capacity determine how much of a crop survives the journey. Where cold storage exists it is often concentrated on a few crops and a few regions.
Handling. Produce loaded loose in sacks arrives bruised; the same produce in rigid crates does not. This is why packaging, discussed in the next section, is a preservation technology and not merely a marketing one.
The environmental accounting here runs both ways, and it is worth being careful about it. Refrigerated transport consumes energy and uses refrigerant gases, so a longer cold chain has a real footprint. But a shorter chain that lets produce spoil wastes everything already invested in growing it. The question is not whether to spend energy on moving and cooling food, but at what point the energy spent saves more than it costs.
6.11 Food Processing, Packaging and Grading
6.11.1 What Food Processing Means
Very little of what a field produces is eaten in the form it leaves the field. Paddy has to be husked before it is rice. Wheat has to be milled before it is atta. Oilseed has to be crushed, sugarcane pressed, milk chilled and often converted.
Food processing is the set of operations by which raw agricultural produce is converted into a form fit for eating, storage, transport or sale.
It is usual to distinguish three degrees of it, and the distinction is useful because the environmental and nutritional questions differ at each level.
Primary processing consists of the minimum operations needed to make produce usable: cleaning, drying, husking, milling, grading, chilling of milk. The product is still recognisably the crop.
Secondary processing converts one product into another: flour into bread and biscuits, oilseed into refined oil, milk into butter, cheese and powder, fruit into juice and jam.
Tertiary processing produces ready-to-eat and ready-to-cook items, in which several ingredients have been combined, cooked and packed.
Why processing is done at all
Four reasons account for most of it.
It extends shelf life, by the mechanisms set out in section 6.10.2, and so decouples the moment of harvest from the moment of eating.
It reduces bulk and weight, which lowers the cost of moving food. A tonne of tomatoes and the paste made from it do not occupy the same truck.
It adds value, and this is where the economics of the countryside enter. Follow a tonne of paddy through a mill, as in Fig. 6.11-1, and it becomes several products of very different worth.
Diagram
Fig. 6.11-1 – flow diagram of paddy milling: input box “1,000 kg paddy” → cleaning → de-husking → polishing → four output boxes with approximate proportions: “head and broken rice, about 670 kg”, “husk, about 200 kg”, “bran, about 80 kg”, “loss and impurities, remainder”; small side arrows from husk to “fuel and boiler feed” and from bran to “oil extraction and cattle feed”
Notice what that diagram implies. The mill sells four products from what the farmer sold as one, and the difference between the price of paddy and the combined value of rice, husk and bran is where processing income is generated. Who captures it depends entirely on who owns the mill — which is the argument for farmer-owned processing units and cooperatives.
Finally, processing makes some foods safe or digestible that otherwise are not. Certain pulses and oilseeds contain compounds that heating destroys, and milk pasteurisation removes disease organisms.
What processing costs
Three costs run in the other direction, and a balanced account has to state them.
Nutritional loss is the first, and the clearest example is the one closest to hand. Polishing rice removes the bran layer, which carries most of the grain’s B vitamins, minerals and fibre. Highly polished rice keeps longer and looks whiter, and is nutritionally poorer than the grain it came from. The same logic applies to finely refined wheat flour. Heat treatment costs heat-sensitive vitamins, as section 6.10.2.2 noted.
Resource use is the second. Food processing industries are substantial consumers of energy and water, and they generate effluent with a high organic load, which depletes oxygen in the water bodies receiving it.
Diet quality is the third. Products at the tertiary end of the scale tend to carry more added salt, sugar and fat than the ingredients they were made from, and are eaten in larger quantities because they are convenient. This is not an argument against processing as such — pasteurised milk and fortified flour are processed too — but against treating “processed” as a single category with a single verdict.
6.11.2 Packaging
Packaging is often treated as an afterthought to processing, and it is not. For many foods it is the preservation method — a can, a sealed pouch or an airtight jar is doing the work described in section 6.10.2, and the treatment inside would fail without it.
Packaging performs five functions at once.
It contains the food, so that a quantity can be handled and sold as a unit.
It protects the food physically, against crushing, abrasion and pests.
It acts as a barrier, keeping out the things that cause spoilage — moisture, oxygen, light and micro-organisms — and keeping in moisture and aroma where those are wanted.
It carries information: the name of the product, the ingredients, the quantity, the date of manufacture and the period within which it should be used, any quality mark, and the manufacturer’s identity. A buyer cannot inspect the inside of a sealed pack, so the label is the only description of the contents available.
It sells the product, since appearance influences what is bought.
The last row states the central environmental problem of modern food packaging. The materials that preserve food best are composites designed so that each layer does one job — and a composite is precisely what a recycling system cannot separate back into useful materials. The better the barrier, in general, the harder the disposal.
6.11.3 Grading
Grading is the sorting of produce into defined categories according to measurable quality characteristics.
The characteristics used depend on the commodity. Wheat is graded on moisture content, foreign matter, shrivelled and broken grain. Fruit is graded on size, colour and freedom from blemish. Cotton is graded on staple length. Oil is graded on purity and free fatty acid content.
The purpose is easy to state once you consider the alternative. Without grades, every transaction requires the buyer to inspect the actual goods, which means trading can happen only face to face, prices cannot be quoted in advance, and quality cannot be described over a distance. With grades, a buyer in one city can contract for a defined quality from a seller in another and know what will arrive.
Three consequences follow, and they matter for everything in section 6.14.
Grading creates a price signal. If a higher grade fetches a higher price, a farmer has a reason to dry the grain properly, harvest at the right maturity and clean the produce — improvements that would otherwise go unrewarded.
Grading reduces disputes and the cost of doing business, because the standard, not the argument, decides what is owed.
Grading lets small producers reach distant markets, provided the grading itself is done fairly and near enough to the farm to be worth using. Where produce is graded only after it has left the farmer’s hands, the benefit of the higher grade accrues to whoever holds it at that point.
The formal grade standards used in India for agricultural produce, and the marks that certify them, are the subject of the next section.
6.12 Food Adulteration and Food Additives
Section 6.11 traced how food moves from the field through processing, packaging and grading to a buyer who never sees where it came from. That distance is exactly what creates the possibility discussed here. A household buying grain from its own field knows what is in it. A household buying packaged turmeric from a shop knows only what the pack says.
6.12.1 Food Adulteration Defined
Food adulteration is the addition to food of any substance that lowers its quality or safety, the substitution of an inferior substance for a genuine one, or the removal of a valuable constituent from it.
Read the three parts of that definition carefully, because students often remember only the first. Watering down milk is adulteration by addition. Selling cheaper khesari dal mixed into more expensive pulses is adulteration by substitution. Skimming the fat out of milk and selling it as whole milk is adulteration by abstraction — nothing foreign has been added at all.
There is a fourth act that also counts: concealing damage. Colouring a stale or spoiled product so that it looks fresh is adulteration, because it removes the buyer’s ability to judge what they are purchasing.
6.12.2 Types of Adulteration
Adulteration is classified by how it comes about, into three types shown in Fig. 6.12-1.
Diagram
Fig. 6.12-1 – classification tree: top box “food adulteration” branching into three boxes — “intentional (deliberate, for profit)”, “incidental (accidental or through negligence)” and “metallic contamination”; under each, two or three example labels: intentional — water in milk, starch in flour, foreign seeds in pulses; incidental — pesticide residues, insect fragments, contamination during storage; metallic — lead, arsenic, mercury, tin
Intentional adulteration is deliberate, and its motive is always the same: a cheap material is passed off as an expensive one. Water is added to milk; starch or chalk powder to flour and to milk products; brick powder or artificial colour to chilli and turmeric powder; papaya seeds to black pepper, which they closely resemble; sand and stones to grain sold by weight; and cheaper pulses to costlier ones. Non-permitted colours are used to make dull produce look bright.
Incidental adulteration is not deliberate. It arises from carelessness or from conditions during growing, processing and storage: pesticide residues left on produce, droppings and insect fragments from poor storage, mould growth on damp grain, and substances migrating into food from unsuitable packaging or utensils.
Metallic contamination is treated separately because of the seriousness of the effects. Lead can enter from solder, from paints and from certain colouring materials; arsenic from pesticide residues; mercury from fish taken from contaminated water; tin from damaged cans.
Notice that the first type is a matter of dishonesty, the second of standards and hygiene, and the third of environmental contamination somewhere upstream. The three call for entirely different remedies, which is why they are worth separating rather than lumping together as “impure food”.
6.12.3 Harmful Effects of Adulteration
The effects range from the merely fraudulent to the seriously dangerous, and it is worth knowing which is which.
The mildest effect is nutritional dilution. Chalk in flour, starch in a milk product or water in milk gives the buyer less nourishment than they paid for. Nobody is poisoned; a household on a tight budget simply gets less food than it thought it was buying, which matters most for the households least able to afford it.
More serious effects follow from specific toxic adulterants, and two of these have well-documented histories in India.
Argemone seed, which resembles mustard seed, contains a toxic alkaloid. Where argemone oil has entered mustard oil in quantity, outbreaks of a condition known as epidemic dropsy have followed, marked by swelling of the limbs and effects on the heart and eyes.
Khesari dal, a hardy pulse that grows where little else will, contains a neurotoxin. Consumed as a major part of the diet over a long period, it can cause lathyrism, a disorder affecting the nerves that control the legs. Its sale mixed into other pulses is prohibited for this reason.
Non-permitted colouring agents used to brighten turmeric, pulses, sweets and vegetables are a third category. Several are industrial dyes never intended for consumption, and long-term ingestion is linked to damage to the liver and to other organs.
Metallic contaminants are the most serious of all. Lead affects the nervous system, and children are considerably more vulnerable to it than adults. Arsenic and mercury accumulate in the body over time — the same bioaccumulation mechanism met in section 6.7.3, operating here through food rather than through a food chain in the wild.
Two indirect harms complete the picture. Honest producers are undercut by dishonest ones and lose business, so adulteration drives quality out of the market rather than merely sitting alongside it. And buyers who cannot trust what they purchase fall back on brands, which favours large firms over small local producers — a cost borne by the very producers who were not cheating.
6.12.4 Food Additives
A food additive is a substance added intentionally to a food in small quantities in order to preserve it, or to improve its appearance, texture, flavour or nutritional value.
The main classes are worth knowing by their function.
Preservatives inhibit the growth of micro-organisms and extend shelf life. Antioxidants delay the process by which fats and oils turn rancid. Colouring agents restore or provide colour. Flavouring agents and flavour enhancers modify taste. Emulsifiers and stabilisers keep mixtures such as ice cream or sauces from separating. Anti-caking agents keep powdered products free-flowing. Sweeteners provide sweetness, sometimes without the calories of sugar. Nutrient supplements are added deliberately to raise nutritional value — iodine in salt, and vitamins added to oil, milk and flour, are examples of this fortification.
The distinction between an additive and an adulterant is the point of this subsection, and it is not a distinction between natural and artificial substances.
The same substance can fall on either side of that line. A permitted colour used within its prescribed limit in a food for which it is allowed is an additive. The same colour used above the limit, or in a food where it is not permitted, is an adulterant. What decides the category is not the chemical but the purpose, the quantity and whether it is declared.
6.13 Quality Marks
Section 6.12 ended on the buyer’s basic difficulty: no way of judging, at the point of purchase, whether what is in the pack matches what is on it. A quality mark is the standard answer to that difficulty. It is a certification symbol placed on a product to show that it has been produced to a defined standard and is subject to inspection.
The mark shifts the work of verification from the buyer, who cannot do it, to an agency that can. Three such marks are used in India, and each covers a different kind of product.
Diagram
Fig. 6.13-1 – three certification marks drawn side by side as simple outline symbols, each with a caption below: ISI mark — “manufactured and industrial goods”; AGMARK — “agricultural produce, graded”; FPO mark — “processed fruit and vegetable products”; a common heading above the three reading “what the mark certifies”
6.13.1 ISI
The ISI mark certifies manufactured and industrial goods. It takes its name from the Indian Standards Institution, the body that introduced it; that institution was reconstituted in 1986 as the Bureau of Indian Standards, which administers the mark today.
A product carrying the mark has been manufactured to the relevant Indian Standard, and the manufacturer’s process is subject to inspection and testing. Certification is voluntary for most goods, but has been made compulsory for a list of products where safety is at stake — cement, cooking gas cylinders, helmets and packaged drinking water among them.
6.13.2 AGMARK
AGMARK certifies agricultural produce. It operates under the Agricultural Produce (Grading and Marking) Act of 1937 and is administered by the Directorate of Marketing and Inspection under the Ministry of Agriculture.
The mark applies to commodities such as ghee, butter, honey, edible oils, spices, cereals and pulses. It certifies that the produce conforms to a specified grade under the grading system described in section 6.11.3 — so the mark carries not only an assurance of purity but a statement of quality class. Certification is voluntary.
6.13.3 FPO
The FPO mark certifies processed fruit and vegetable products — jams, squashes, sauces, pickles, canned and bottled fruit and vegetables.
It takes its name from the Fruit Products Order of 1955, made under an earlier law, which laid down hygiene and quality requirements for units manufacturing such products. Unlike the other two marks, it was mandatory: no processed fruit or vegetable product could be sold without it. Since the Food Safety and Standards Act of 2006 came into force, the licensing of such units has been brought within the single food safety framework described in section 6.12.3.
6.14 Food Security
6.14.1 The Meaning of Food Security
The idea of food security began as a question about supply and has been redefined twice since, each time because the earlier definition missed something that mattered.
The first version asked whether enough food existed. After the experience of famines occurring in regions where food was present — the mechanism examined in section 6.4.4 — the definition was widened to ask whether people could obtain it. It was widened again to ask whether, having obtained it, they could actually use it, and whether that would still be true next year.
Food security exists when all people, at all times, have physical and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life. This formulation, agreed at the World Food Summit in 1996, is the one in general use.
Every phrase in that sentence is doing work, and it is worth reading it slowly.
“All people” rules out an average. A country in which most people eat well and some do not is not food secure; it is food secure for most people, which is a different statement.
“At all times” rules out a good year. Security is about dependability, not about a single harvest.
“Physical and economic access” names two separate barriers. Food may be absent from the local market, or present and unaffordable.
“Safe and nutritious” rules out calories alone. Food that is adulterated, contaminated or nutritionally empty does not deliver security, however much of it there is.
“Dietary needs and food preferences” acknowledges that what people will actually eat is part of the problem. Grain that a household does not recognise, cannot cook with the fuel it has, or will not eat, does not feed anyone.
From this definition follow the four dimensions on which food security is usually assessed, shown in Fig. 6.14-1.
Diagram
Fig. 6.14-1 – a horizontal slab labelled “food security” resting on four pillars of equal height, labelled from left to right: “availability — enough food is produced or imported”, “access — people can obtain it, physically and economically”, “utilisation — the body can actually use it, given health, water and preparation”, “stability — the other three hold over time”; one pillar drawn cracked, with the slab tilting, and a caption reading “if any one pillar fails, the structure does not stand”
6.14.2 Why Food Security Is Needed
Three arguments justify treating food security as a public responsibility rather than leaving it to markets and households alone.
The first is that hunger is irreversible in its effects. Undernutrition in the first years of life affects physical growth and cognitive development permanently, so the cost of a hungry year is carried by that person for a lifetime and shows up decades later in the productivity of the workforce.
The second is that food demand is inflexible in a particular way. A household cannot postpone eating as it can postpone buying clothes. When prices rise, poor households do not buy less food in proportion; they buy cheaper and less varied food, cutting pulses, milk, vegetables and oil first. Calories may hold roughly steady while the quality of the diet collapses.
The third is that agricultural supply is variable in ways nobody controls. A monsoon that arrives late affects an entire region at once, so shortage and high prices strike everybody in a locality simultaneously, precisely when local wage work also disappears.
It is useful here to distinguish three states, because policy responses differ.
Chronic food insecurity is a persistent inability to meet food needs, and it is essentially a problem of poverty.
Seasonal food insecurity recurs at the same point each year, in the lean months between the exhaustion of one harvest and the arrival of the next.
Transitory food insecurity is a sudden shortfall caused by a drought, a flood, a price spike or the loss of a job.
The following three subsections take the problems of attaining food security in the order the syllabus sets them: production, storage and access.
6.14.3 The Problem of Production
Enough food has to be grown, and four pressures make that harder than it was.
Land is not expanding. Cultivated area is close to its limit, and it is being lost at the edges to housing, industry, roads and to degradation of the kind described in section 6.7.2 — salinity, waterlogging, erosion and loss of organic matter.
Water is the binding constraint in more and more districts. Where groundwater is drawn down faster than it is replenished, present production is being met by borrowing against future production.
Holdings are small and getting smaller. Repeated division among heirs means most Indian farms are now very small, which limits investment capacity even where the inverse size–output relationship of section 6.8.2 means output per hectare stays high.
The composition of output is uneven. The Green Revolution package delivered wheat and rice, and India has been broadly self-sufficient in cereals for decades. Pulses and edible oils, largely grown on rain-fed land without the same support, have not kept pace with demand — which is why a country with cereal surpluses can still import pulses and oil.
That last point should be read alongside section 6.14.1. Cereal self-sufficiency answers the availability question for calories, and leaves the protein and fat question partly open.
6.14.4 The Problem of Storage
Growing food is of no use if it is lost before it is eaten, and section 6.10 dealt with the technical side of this. Two further storage problems belong specifically to food security.
The first is capacity and its timing. A national buffer stock — grain held by the state to release when harvests fail or prices spike — is what converts one good year into insurance for a bad one. Holding it requires covered storage on an enormous scale, in the right locations, maintained against moisture, insects and rodents. Where stocks exceed proper storage capacity, grain is held under covers on open plinths, and losses follow.
The second is who can afford to store. This is the more important problem and the less obvious one. A household that must repay a loan at harvest sells then, when everyone else is also selling and the price is at its annual low, and buys grain back months later at a higher price. Storage capacity, in other words, is not only a physical asset but a financial one: the ability to wait. Warehouse receipt systems, which allow a farmer to deposit produce in a certified warehouse and borrow against the receipt, exist precisely to break that trap.
6.14.5 The Problem of Access
Access is the pillar on which food security most often fails in a country that produces enough.
A household obtains food in one of two ways. It grows it, which requires land, water and inputs. Or it buys it, which requires income. Landless labourers, marginal farmers who buy more grain than they sell, and the urban poor are all in the second category, and for them food security is a question about wages and prices rather than about harvests.
This is the entitlement argument encountered in section 6.4.4, applied to ordinary times rather than to famine. Two further factors sharpen it.
Physical access matters where roads are poor, markets are distant or a fair price shop is far from a hamlet. A ration a household cannot reach is a ration it does not have.
Distribution within the household matters too. Food entering a house is not automatically shared according to need, and where it is not, an adequate household supply can still leave particular members — often the youngest, the oldest, or those who eat last — undernourished.
6.14.6 An Integrated and Sustainable Approach
Since the causes are multiple, the response has to be. The syllabus sets out an integrated approach for the developing world — the group of countries historically described as the “third world”, a Cold War-era term for nations aligned with neither bloc, now more usually called developing countries or the Global South. Its elements are taken in turn.
6.14.6.1 Working for Environmental Sustainability
This is placed first because it is the constraint on everything else. Food security that depletes the soil, the groundwater and the crop diversity it depends on is not security; it is a loan against the next generation’s harvest.
The practical content is the whole of section 6.9 — rotation with legumes, organic matter returned to the soil, water applied efficiently and recharged, pest management based on thresholds, and crop diversity maintained in fields as well as in gene banks. What is added here is only the reason for doing it: a farming system that degrades its own base becomes less secure every year, however much it produced this season.
6.14.6.2 Credit Support and Market Support to Farmers
Section 6.7.4 showed that almost the whole cost of a modern crop is incurred before any of it is sold. Two supports follow from that fact.
Credit support means access to institutional credit at a reasonable rate, timed to the crop cycle. Where it is absent, a farmer borrows informally at a far higher rate, and the loan itself becomes the reason for distress sale at harvest. Crop loan schemes, cooperative and regional rural banks, and simplified credit cards for farmers all exist to substitute institutional lending for informal lending.
Market support means an assurance about the price at which output can be sold. A minimum support price announced before sowing, backed by an agency willing to purchase at that price, removes the risk that a good harvest will be met by a collapsed market. It was an essential part of the Green Revolution package, and section 6.6.3 has already noted that adoption of the new technology would not have happened without it.
Both supports have a known limitation, and it should be stated. They work best for the crops that are actually procured and in the regions where procurement operates — historically wheat and rice, in the surplus states. A pulse or millet grower in a rain-fed district may receive an announced price with no purchaser present, which is one reason cropping patterns have stayed tilted towards the two supported cereals.
6.14.6.3 Inadequacies in the Present Marketing System
Between the farm gate and the consumer lies a chain, and the longer and less transparent it is, the smaller the share of the final price that reaches the person who grew the crop.
Diagram
Fig. 6.14-2 – horizontal bar representing the consumer’s rupee, divided into segments running left to right: “farmer’s share”, “village trader”, “commission agent”, “wholesaler”, “transport and losses”, “retailer”; a second, shorter bar below it labelled “shorter chain — direct or producer organisation sale”, with a visibly larger farmer’s share segment; caption note: “proportions shown are illustrative, and vary greatly by crop, season and place”
Five inadequacies recur.
Too many intermediaries, each taking a margin, so that the farmer’s share of what the consumer pays is small.
Distance to a regulated market, so that produce is sold at the village to whoever comes, at whatever is offered.
Absence of storage and grading at the farmer’s end, so that produce must be sold immediately and cannot be sold as a certified grade.
Information asymmetry: the buyer knows prices in several markets and the seller usually knows one. A person who does not know today’s price elsewhere cannot bargain over today’s price here.
Delayed payment and deductions, which push a farmer needing cash immediately towards the buyer who pays at once rather than the one who pays best.
Ways to improve the system follow directly from that list. More regulated market yards within reach of villages. Electronic trading platforms that publish prices and let buyers in other markets bid. Farmer producer organisations, which aggregate the produce of many small growers so that they can sell in commercially meaningful quantities and negotiate as one seller. Warehouse receipts, which decouple selling from harvesting. Grading and certification near the farm, so that quality is rewarded at the point where the farmer still owns the crop. And better roads, cold chains and transport, which — as section 6.10.3 noted — raise farm-gate prices without changing anything in the field.
6.14.6.4 Improving Access to Food
Where access rather than availability is the binding constraint, three kinds of intervention are used, and they work in different ways.
Subsidised supply delivers food itself, at a price below the market, through a public distribution system of fair price shops.
Direct feeding programmes bypass the household budget entirely by providing prepared meals or take-home rations to the people most at risk — children in school, children below school age, pregnant women and nursing mothers. Their advantage is that they reach the individual rather than the household, which addresses the problem of distribution within a household noted above.
Income support and employment programmes work on the other side of the equation, raising what a household can buy rather than lowering what food costs. A guaranteed wage in the lean season is, in effect, food security purchased through the labour market.
Each has a characteristic weakness. Subsidised supply can leak, exclude those without documents, and offer only the two cereals it procures. Feeding programmes require reliable delivery every day. Employment programmes require work to be available where and when people need it.
6.14.6.5 Ownership of Seeds
The last element returns to where the chapter opened. Section 6.3.2 described a seed supply held inside the farming system, saved and exchanged by cultivators. Sections 6.1.4 and 6.1.5 described seed that must be bought each season — hybrids that do not breed true, and modified varieties that are patented or licensed.
The food security question is what happens when the seed supply sits outside the farming system. A household that cannot save seed must have cash before each sowing, and depends on the seed reaching its market in time and in good quality. Its choice of variety is narrowed to what is sold locally. And the pressure towards uniformity described in section 6.7.1 tightens, because a company multiplies the varieties it can sell widely.
Indian law addresses this directly.
Community seed banks, in which a village maintains and lends out seed of local varieties, address the same problem from the other direction: they keep a supply inside the system that does not have to be bought.
6.14.7 National, Household and Community Level Food Security
This subsection contains the single most important idea in the section, and it is worth stating flatly. national food security does not guarantee household food security.
The two are measured differently. National security is a question about total supply: production, imports and stocks against total requirement. Household security is a question about one family’s ability to obtain enough of the right food, all year. A country can satisfy the first completely while a substantial number of households fail the second.
Two further gaps sit between the national picture and the individual one.
Community-level security depends on local conditions that national totals cannot see: whether there is work in the lean season, whether the local market functions, whether a road is passable in the monsoon, whether common land still supplies fuel and fodder.
Nutrition security is narrower than food security and often fails when food security appears to hold. A household eating enough cereal but little pulse, milk, oil, fruit or vegetable is meeting its calorie needs and not its protein and micronutrient needs — the composition problem of section 6.14.3, arriving at the level of a single plate.
Finally, none of this holds over time without the environmental element of section 6.14.6.1. Security purchased by mining groundwater and soil organic matter is temporary by construction. Stability, the fourth pillar in Fig. 6.14-1, is where the environmental and the social sides of this chapter meet.
6.14.8 The Food Security Law of 2013
India’s principal statutory response to the access problem is the National Food Security Act of 2013, which converted what had been schemes granted by policy into entitlements claimable as of right.
Several features of that design answer problems identified earlier in this section.
Making the entitlement a legal right, rather than a scheme, means non-delivery is actionable rather than merely regrettable — which is what the food security allowance and the grievance machinery are for.
Naming the eldest woman as head of household for the ration card responds to the problem of distribution within the household.
Providing meals directly to children and to pregnant and nursing women reaches the individuals most affected by undernutrition, rather than relying on the household to allocate.
What the entitlement covers, and what it does not
It is worth working out what 5 kg per person per month actually amounts to.
Take an adult eating roughly 350 g of cereal a day. The monthly requirement is
\[350\ \text{g/day} \times 30\ \text{days} = 10{,}500\ \text{g} = 10.5\ \text{kg per month}\]
so the entitlement covers
\[\frac{5}{10.5} \times 100 \approx 48\ \text{per cent}\]
of that person’s cereal needs. For a household of five, the entitlement is 25 kg a month against a cereal requirement of about 52 kg.
The arithmetic makes the design intention clear. The Act supplements the household’s own purchases and production; it does not replace them. And since the entitlement is grain, it addresses calories rather than the pulses, oil, milk and vegetables that the nutrition gap of section 6.14.7 actually concerns.
That is not a criticism of the law so much as a statement of what any single instrument can do. Food security is not achieved by a distribution system, or by higher yields, or by land reform, or by better markets. It requires all of them, sustained over time, on a resource base that is not being consumed in the process — which is the argument this whole chapter has been building.
6.15 Summary
Systems of farming
Six systems of farming are distinguished mainly by how much comes from outside the farm. Traditional agriculture uses locally saved seed, animal power and organic manure in a largely closed loop. Natural farming goes further and avoids tillage, fertilizer, pesticide and weeding altogether. Organic agriculture manages the crop actively but excludes synthetic fertilizers and pesticides.
Modern agriculture combines hybrid seed, high yielding varieties, chemical fertilizers, pesticides, irrigation and machinery to maximise yield per hectare. A hybrid is the vigorous first generation of a cross between two parent lines and does not breed true; a high yielding variety is bred to convert fertilizer and water into grain rather than straw. The two terms are not interchangeable.
The gene revolution is the phase based on genetically modified seed, into which a gene from another organism has been inserted. Bt cotton has been the only genetically modified crop approved for commercial cultivation in India.
Sustainable agriculture meets present food needs without degrading the soil, water and genetic resources on which future production depends. It is a goal, not a method: organic farming, natural farming and integrated pest management are routes towards it, and low yield is not by itself sustainable.
Irrigation and water harvesting
Macro irrigation moves large volumes through canals from a dam, serving lakhs of hectares by gravity. Its costs are seepage losses, waterlogging, salinity, unequal supply between the head and tail of a canal, and submergence of land behind the reservoir.
Micro irrigation delivers measured quantities through pipes. Sprinklers apply water as rain; drip or trickle irrigation wets only the root zone and is the most water-efficient method, though costly to install and prone to emitter clogging. A dug well gives a household control over timing but fails when the surrounding water table falls.
Seven traditional harvesting structures answer local conditions: tankas (covered underground tanks for drinking water in arid Rajasthan), khadins (bunds retaining run-off from rocky uplands so a crop grows on residual moisture), ahars (three-sided catchment basins in south Bihar) with pynes (channels feeding them), zings (tanks storing afternoon glacial meltwater in Ladakh), johads (small check dams recharging groundwater in semi-arid Rajasthan) and eris (tank systems irrigating paddy, absorbing floods and recharging groundwater in Tamil Nadu).
Pre-colonial and colonial agriculture
Pre-colonial agriculture was organised around subsistence: the household’s food, seed, fodder and obligations came first, and the surplus was sold. This favoured multi-cropping and a very large stock of landraces, each adapted to a locality.
Soil fertility was maintained without manufactured inputs, by farmyard manure, nitrogen-fixing legumes, fallowing and the carting of tank silt, ash and litter onto fields — a closed nutrient loop whose only fresh input came free from the atmosphere.
Colonial land revenue was fixed in cash, due on set dates, and enforced by sale of the holding. Because a cash demand does not fall when the harvest fails, the risk of a bad monsoon shifted onto the cultivator, who borrowed to meet it.
Commercial crops for export and for British industry — cotton, jute, indigo, opium, tea — displaced mixed food cropping, moving fields towards monoculture and exposing households to crop prices as well as to weather. Fallows shortened, pulses lost area, manure grew scarce and local irrigation works decayed. Canals and railways were also built in this period and raised output.
The Bengal famine of 1943 followed the loss of Burmese rice imports, cyclone and crop damage, wartime inflation and procurement, and restrictions on the movement of grain and boats. Deaths are commonly estimated at two to three million. The episode established that people can starve where food exists, if they cannot command it — the distinction between availability and access.
Independence and the Green Revolution
At independence, yields were low, area could no longer be expanded much, and the shortfall was met by importing grain, reaching about ten million tonnes at the mid-1960s droughts. Since production equals area multiplied by yield, and area was nearly exhausted, raising yield became the only route.
The Green Revolution introduced semi-dwarf high yielding wheat and rice from the 1960s, bred in Mexico under Norman Borlaug and in the Philippines at the International Rice Research Institute, and released in India alongside irrigation, fertilizer, credit and an assured procurement price. Adoption began in Punjab, Haryana and western Uttar Pradesh.
Semi-dwarf plants yield more because their harvest index is higher — short stiff stems send additional growth into grain instead of straw, and do not lodge under heavy fertilizer. Without the fertilizer and water they were bred for, they may yield less than the local varieties they replaced.
The package produced mono cropping — one crop, often one variety, over large areas season after season — which is efficient to manage and offers no internal buffer against a new pest or disease.
Appraising the Green Revolution
The gains are substantial and not in dispute: cereal self-sufficiency, the end of routine grain imports, buffer stocks, and no recurrence of mass famine.
Agro-biodiversity fell sharply as landraces were replaced, a process called genetic erosion. Uniformity leaves a whole region equally vulnerable, as the maize leaf blight of 1970 in the United States demonstrated, and removes the raw material from which future varieties must be bred.
Soil health declined through loss of organic matter, nutrient imbalance from nitrogen-dominated fertilizer use, waterlogging and salinity under canals, and falling water tables where pumping exceeded recharge.
Pesticides brought bioaccumulation within organisms and biomagnification up food chains, together with resistance, pest resurgence and secondary pest outbreaks — the pesticide treadmill, in which each round of spraying creates the need for the next.
Energy use rose because fertilizer manufacture, pumping, machinery and pesticide synthesis all draw on fossil fuel. Input costs are incurred months before the harvest and do not fall when yields do, so a modest fall in yield produces a much larger fall in the farmer’s margin.
Benefits went disproportionately to regions with assured irrigation and to households with credit and land, widening regional and household gaps, while higher labour demand raised agricultural wages and benefited landless workers.
Land shifted from pulses and coarse grains towards wheat and rice, so a diet can gain in calories while losing in protein and micronutrients.
Land reform
Land reform addressed four inherited problems: intermediaries between cultivator and state, insecurity of tenancy, concentration of ownership, and fragmentation of individual holdings.
It was argued for on three grounds — that secure ownership creates an incentive to invest, that small farms show higher output per hectare so redistribution need not lower production, and that land is security, collateral and standing as well as an asset.
Abolition of intermediaries largely succeeded, and consolidation worked well in the north-western states. Tenancy reform succeeded where administration recorded cultivators on the ground, as in Kerala and in the West Bengal sharecropper registration begun in 1978.
Ceiling legislation largely failed, through division of holdings on paper, advance transfers, wide exemptions and incomplete land records. Tenancy reform elsewhere drove leasing out of the record rather than ending it, leaving tenants less protected than before.
Elements of sustainable agriculture
Mixed farming combines crops and livestock so that each supplies the other, and provides a continuous income alongside a seasonal one.
Mixed cropping sows two or more crops together without a row pattern, mainly as insurance against failure. Inter-cropping grows them in a definite row ratio so that they use different resources, mainly to raise total output per unit area, and allows each to be managed and harvested separately.
Crop rotation grows a planned sequence of different crops, restoring nitrogen through legumes, drawing on different rooting depths, and breaking pest and disease cycles at no cost.
Soil fertility is built by organic fertilizers such as farmyard manure and vermicompost, which supply bulk organic matter; by bio-fertilizers such as Rhizobium and blue-green algae with Azolla, which are living organisms that fix or release nutrients; and by green manures such as dhaincha and sunn hemp, which are grown and ploughed in while green at the cost of one season’s output.
Bio pesticides — neem preparations, Bacillus thuringiensis, Trichoderma — are selective and break down quickly, but act more slowly and need correct timing.
Integrated Pest Management combines cultural, mechanical, biological and, last, chemical methods, guided by monitoring against the economic threshold level, the pest density at which the cost of damage begins to exceed the cost of control. It opposes routine calendar spraying, not pesticides as such.
Eating local and seasonal food supports regional varieties and cuts transport and storage energy, though for most foods the method of production matters more to the environmental cost than the distance travelled.
Managing produce, processing and standards
Post-harvest loss wastes land, water, fertilizer and labour already spent. Safe storage requires grain dried to roughly 12 to 14 per cent moisture, and protection against insects, rodents and moulds; damp storage of groundnut and maize risks aflatoxin production, which cooking does not destroy.
Preservation works by removing what spoilage organisms need. Low temperatures slow growth without killing; high temperatures kill, with pasteurisation retaining quality and sterilisation giving longer keeping; drying removes available water; canning combines airtight sealing with heat processing; salt and sugar draw water out of microbial cells by osmosis.
Transport requires speed, protection from damage and, for perishables, an unbroken cold chain. Poor transport lowers the farm-gate price as well as destroying produce.
Food processing converts raw produce into edible, storable and marketable form, adds value and extends shelf life, but can remove nutrients — as polishing removes the bran layer of rice — and consumes energy and water. Packaging contains, protects, provides a barrier, informs and sells; the best barriers are multi-layer laminates, which are the hardest to recycle. Grading classifies produce by measurable quality and makes trade at a distance possible while rewarding quality at the farm.
Food adulteration lowers quality by addition, substitution, removal or contamination, and is classified as intentional, incidental or metallic. Its effects run from nutritional loss to acute illness, as with argemone oil in mustard oil, to cumulative harm from heavy metals, to economic loss that falls hardest on the poorest buyers.
A food additive is distinguished from an adulterant by four tests: it must be permitted, within the permitted quantity, for a stated technological purpose, and declared on the label.
Three quality marks certify against published standards: ISI for manufactured goods, administered by the Bureau of Indian Standards; AGMARK for agricultural produce, which certifies a defined grade; and FPO for processed fruit and vegetable products, now brought within the national food safety framework.
Food security
Food security exists when all people, at all times, have physical and economic access to sufficient, safe and nutritious food meeting their dietary needs and preferences for an active and healthy life. Its four dimensions are availability, access, utilisation and stability, and failure of any one is enough.
Production is constrained by limited land, groundwater depletion, small holdings and a cereal-tilted output that leaves pulses and edible oils short. Storage requires both physical capacity and the financial ability to wait, which distress sale at harvest denies. Access depends on income and prices, on physical reach to markets and fair price shops, and on distribution within the household.
An integrated approach requires environmental sustainability first, then land reform, credit support timed to the crop cycle, market support through an assured price, reform of a marketing chain weakened by too many intermediaries and by information asymmetry, direct measures to improve access, and farmers’ continued ability to save and exchange seed — recognised in the Protection of Plant Varieties and Farmers’ Rights Act, 2001.
National food security does not guarantee household food security, because national totals measure availability and hunger is usually a failure of access. Nutrition security is narrower still and can fail while calorie needs are met.
The National Food Security Act, 2013 makes subsidised grain a legal entitlement for up to three-quarters of the rural and half of the urban population, at 5 kg per person per month, with 35 kg per household for the poorest; provides meals and maternity benefit to pregnant and nursing women and free meals to children up to fourteen; requires a food security allowance where grain is not supplied; treats the eldest woman aged eighteen or above as head of household for the ration card; and provides for grievance redressal and a State Food Commission. At roughly 5 kg against a monthly cereal requirement of about 10.5 kg per adult, the entitlement supplements a household’s food supply rather than replacing it.
6.16 Key Terms
AGMARK — Agricultural Marking; the certification mark for graded agricultural produce, issued under the Agricultural Produce (Grading and Marking) Act.
Agro-biodiversity — the total variety of cultivated species, crop varieties, domesticated animals and associated organisms present in an agricultural system.
Ahar — a catchment basin of south Bihar, embanked on three sides with the natural slope closing the fourth, used to store run-off and flood water.
Bio pesticide — a pest control agent derived from a living organism or a natural product rather than synthesised industrially.
Bio-fertilizer — a preparation of living micro-organisms that makes nutrients available to a crop by fixing atmospheric nitrogen, solubilising phosphorus or extending the root’s absorbing surface.
Bioaccumulation — the build-up of a persistent substance in the tissues of an individual organism, because intake exceeds the rate at which it is broken down or excreted.
Biomagnification — the rise in concentration of such a substance at each successive level of a food chain.
BIS — Bureau of Indian Standards; the national standards body that administers the ISI mark.
Canning — preservation by sealing food in an airtight container and then heating it sufficiently to destroy the micro-organisms inside.
Chemical fertilizer — a manufactured compound supplying plant nutrients in concentrated, readily available form, such as urea for nitrogen.
Cold chain — the unbroken sequence of refrigerated storage and transport through which a perishable food must pass from harvest to sale.
Command area — the total area that a canal irrigation system is able to serve.
Credit support — access to institutional credit at a reasonable rate, timed to the crop cycle, so that inputs can be bought before the harvest is sold.
Crop rotation — the cultivation of a planned sequence of different crops on the same land in successive seasons.
Diversity in seed — the presence of many locally adapted varieties of a crop within a farming system.
Drip irrigation — micro irrigation in which water is released drop by drop through emitters at the base of each plant, wetting only the root zone. Also called trickle irrigation.
Drying — preservation by removing the water that micro-organisms need in order to grow.
Dug well — a wide, shallow, hand-dug shaft sunk to the water table, from which water is lifted for irrigation of nearby fields.
Economic threshold level — the pest density at which the value of the damage being caused begins to exceed the cost of controlling it.
Eri — a tank of the Tamil Nadu tank irrigation system, storing monsoon run-off for paddy irrigation, flood absorption and groundwater recharge.
Fallowing — leaving land uncropped for a season or longer so that natural processes rebuild its fertility.
Food additive — a substance added intentionally to a food in small quantity for a stated technological purpose, permitted under food regulations and declared on the label.
Food adulteration — the lowering of the quality or safety of a food by addition of an inferior or harmful substance, by substitution, by removal of a valuable constituent, or by contamination.
Food preservation — the treatment of food to arrest the microbial and enzymatic changes that cause spoilage.
Food processing — the conversion of raw produce, by physical or chemical operations, into a form fit for eating, storage, transport or sale.
Food security — the condition in which all people, at all times, have physical and economic access to sufficient, safe and nutritious food meeting their dietary needs and food preferences for an active and healthy life.
FPO — Fruit Products Order; the mark certifying processed fruit and vegetable products manufactured under prescribed hygiene and quality standards.
FSSAI — Food Safety and Standards Authority of India; the regulator established under the Food Safety and Standards Act, 2006.
Gene revolution — the phase of agricultural change based on genetically modified seed, in which genes from another organism are inserted by laboratory techniques.
Genetic erosion — the loss of genetic diversity within a cultivated species as locally adapted varieties are replaced by a few widely grown ones.
Genetically modified seed — seed carrying one or more genes inserted from another organism by laboratory techniques to confer a specific trait.
GM seed — genetically modified seed; seed carrying one or more genes deliberately inserted from another organism.
Grading — the classification of produce into defined categories according to measurable quality characteristics such as size, moisture, colour and freedom from foreign matter.
Green manure — a fast-growing crop, usually a legume, grown and ploughed into the soil while still green in order to enrich it.
Green Revolution — the programme of change from the 1960s in which semi-dwarf high yielding varieties of wheat and rice were introduced with irrigation, chemical fertilizers and pesticides, sharply raising cereal yields.
Harvest index — the ratio of the weight of harvested grain to the total above-ground weight of the plant.
High yielding variety — a crop variety bred to convert heavy applications of fertilizer and water into grain rather than into straw.
Hybrid seed — the first-generation seed produced by crossing two maintained parent lines; vigorous and uniform, but it does not breed true, so fresh seed must be bought each season.
HYV — high yielding variety; a variety bred to convert heavy applications of fertilizer and water into grain rather than into straw.
Integrated Pest Management — a pest control strategy combining cultural, mechanical, biological and, only where necessary, chemical methods, guided by monitoring against an economic threshold level.
Inter-cropping — the simultaneous cultivation of two or more crops in a definite row pattern and proportion, so that each can be managed and harvested separately.
Intermediaries — rent-collecting right-holders standing between the cultivator and the state under the colonial revenue settlements.
IPM — Integrated Pest Management; the coordinated use of cultural, mechanical, biological and, only where necessary, chemical methods, guided by monitoring, to hold pests below the economic threshold level.
IRRI — International Rice Research Institute; the institute in the Philippines, established in 1960, at which semi-dwarf rice varieties were developed.
Irrigation — the controlled application of water to soil to supplement rainfall so that a crop receives water when and in the quantity it needs.
ISI — the certification mark for manufactured goods, named after the Indian Standards Institution and now administered by the Bureau of Indian Standards.
Johad — a small earthen check dam of semi-arid Rajasthan that holds back rainwater so that it percolates and recharges groundwater.
Khadin — an earthen bund built across the lower edge of a rocky slope in the Jaisalmer region, retaining run-off so that a crop can be grown on the residual soil moisture.
Land reform — the modification by legislation of the ownership, tenancy and size distribution of agricultural holdings.
Landrace — a crop variety developed and maintained by farmers through repeated selection in a particular locality.
Legume — a plant of the pulse family, whose root nodules carry bacteria that convert atmospheric nitrogen into a form plants can absorb.
Lodging — the falling over of a tall cereal crop before harvest under the weight of a heavy grain head.
Macro irrigation — irrigation that moves large volumes of water through open channels from a dam or barrage and floods whole fields.
Manuring — the return of cattle dung, household waste and crop residues to the field as farmyard manure.
Market support — an assurance about the price at which output can be sold, typically a minimum support price backed by procurement.
Micro irrigation — irrigation that delivers small measured quantities of water under pressure through pipes, close to the plant.
Mixed cropping — the simultaneous cultivation of two or more crops on the same field without a definite row pattern, mainly as insurance against failure.
Mixed farming — a system in which crop cultivation and animal husbandry are carried on together on the same holding, each supplying inputs to the other.
Modern agriculture — farming based on hybrid seed and high yielding varieties grown with chemical fertilizers, pesticides, assured irrigation and machinery.
Mono cropping — the repeated cultivation of one crop, and often one variety, on the same land over successive seasons across a large area.
Monoculture — the growing of a single crop species, often a single variety, over a large area in a given season.
Mulching — covering the soil surface with crop residue, straw or leaves to reduce evaporation, moderate soil temperature and suppress weeds.
Multi-cropping — growing more than one crop from the same piece of land in a year, or growing several crops together on it.
Natural farming — cultivation in which tillage, chemical fertilizer, pesticide and weeding are avoided and natural processes within the field are relied on.
Organic agriculture — a production system that maintains fertility and controls pests through organic manures, rotation and biological methods, excluding synthetic fertilizers and pesticides.
Organic fertilizer — a material of plant or animal origin, such as farmyard manure or vermicompost, which supplies nutrients and organic matter as it decomposes.
Pest resistance — the loss of a pesticide’s effectiveness as the survivors of earlier applications breed and come to dominate the pest population.
Pest resurgence — the rebound of a pest population to a higher level than before spraying, because natural enemies were killed and recover more slowly.
Pesticide — a chemical used to kill or suppress organisms that damage a crop, covering insecticides, fungicides, herbicides and rodenticides.
Pyne — an artificial channel of south Bihar carrying water from a river or stream across the fields and into an ahar.
Quality mark — a certification symbol placed on a product to show that it has been made to a defined standard and is subject to inspection.
Rainwater harvesting — the collection and storage of rainfall or run-off, for direct use or to recharge groundwater, instead of allowing it to run off.
Secondary pest outbreak — the emergence as a major pest of an organism previously kept in check by natural enemies that broad-spectrum spraying has killed.
Sprinkler system — micro irrigation in which pumped water is thrown into the air through nozzles so that it falls on the crop like rain.
Storage — the holding of harvested produce under conditions that protect it from moisture, insects, rodents and fungi until it is used.
Subsistence farming — cultivation carried out primarily to meet the needs of the farming household itself, with only the surplus entering exchange.
Sustainable agriculture — farming that produces adequate yields while conserving the soil fertility, water and biological diversity on which future production depends.
Tanka — a covered underground tank of arid Rajasthan, storing rainwater from a prepared catchment, chiefly for drinking.
Traditional agriculture — farming relying on locally adapted seed, animal and human labour, organic manures and inherited local knowledge, with minimal purchased inputs.
Trickle irrigation — see Drip irrigation.
Zing — a small tank of Ladakh that collects glacial meltwater brought by guiding channels, for use on the fields the following day.
6.17 Points to Ponder
A farming system that produces enough today by drawing down its soil and groundwater is meeting the needs of the present generation but not protecting the next. If the two halves of the definition of sustainable agriculture pull against each other, on what basis should the balance be struck — and by whom?
Seed saved on a farm costs nothing and stays in the farmer’s control; purchased seed yields more and must be bought every season. What does a farming household actually give up when it makes that exchange, and is what it receives worth it?
The packaging that preserves food best is the hardest to recycle, and the food it saves cost far more land, water and energy to grow than the wrapper cost to make. How should a society decide which of the two wastes it minds more?
Ceiling laws on landholdings largely failed, while abolition of intermediaries largely succeeded, though both were passed by the same legislatures at much the same time. What does the difference suggest about which kinds of law a state can actually enforce?
If a country’s granaries are full and some of its households are still hungry, is that a failure of agriculture, of the market, or of the state — and does it matter which one you call it?
Almost every element of sustainable agriculture in this chapter — rotation, mixed cropping, manure, diverse seed — was ordinary practice two centuries ago and was abandoned as yields rose. Is the return to them a correction of a mistake, or something a society can only afford once it is already producing a surplus?
6.18 Objective Questions
- Which of the following is the defining feature of a high yielding variety?
- It is produced by crossing two inbred parent lines
- It carries a gene inserted from another organism
- It converts applied fertilizer and water into grain rather than straw
- It resists all common pests and diseases [1 mark]
- A khadin* is best described as:*
- an underground covered tank storing rooftop rainwater
- a bunded field in which a crop is grown on residual soil moisture
- a channel carrying river water to fields
- a tank storing glacial meltwater [1 mark]
- In which method of food preservation does water move out of microbial cells by osmosis?
- Canning
- Pasteurisation
- Freezing
- Preservation by salt and sugar [1 mark]
- The economic threshold level in Integrated Pest Management refers to:
- the cost of pesticide per hectare
- the pest density at which the damage caused begins to exceed the cost of control
- the minimum income required to purchase pesticides
- the maximum pesticide residue permitted in food [1 mark]
- Which one of the following is a bio-fertilizer and not an organic fertilizer?
- Farmyard manure
- Vermicompost
- Rhizobium culture
- Sunn hemp ploughed into the soil [1 mark]
- Assertion (A): A semi-dwarf wheat variety yields more grain than a tall traditional variety when heavily fertilized. Reason (R): The semi-dwarf variety has a higher harvest index and its stiff short stem does not lodge under the weight of the grain head.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true [1 mark]
- Assertion (A): Full government godowns are sufficient to guarantee that no household goes hungry. Reason (R): Food security requires access as well as availability.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true [1 mark]
- Assertion (A): Broad-spectrum pesticide spraying can leave a pest population larger than it was before the spray. Reason (R): Natural enemies of the pest are killed along with it and recover more slowly than the pest does.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true [1 mark]
- Match the water harvesting structure in Column A with the region in Column B.
| Column A | Column B |
|---|---|
| a. Zing | i. Tamil Nadu |
| b. Eri | ii. South Bihar |
| c. Ahar | iii. Ladakh |
| d. Tanka | iv. Arid Rajasthan |
[1 mark]
- Match the quality mark in Column A with what it certifies in Column B.
| Column A | Column B |
|---|---|
| a. ISI | i. Grade of agricultural produce |
| b. AGMARK | ii. Processed fruit and vegetable products |
| c. FPO | iii. Conformity of a manufactured product to an Indian Standard |
[1 mark]
Fill in the blank: Cereal grain is generally considered safe for storage at a moisture content of about ______ per cent. [1 mark]
Fill in the blank: Growing two or more crops together on the same field in a definite row pattern is called ______. [1 mark]
State whether true or false: A bio-fertilizer supplies nutrients directly, in the same way that farmyard manure does. [1 mark]
State whether true or false: Under the National Food Security Act, 2013, the eldest woman of the household aged eighteen years or above is treated as the head of the household for issuing the ration card. [1 mark]
Give the full form of each of the following: HYV, IPM, GM seed, AGMARK, FPO. [1 mark]
6.19 Check Your Concepts
Define sustainable agriculture. [2 marks]
What is meant by harvest index? [2 marks]
Define green manure and name two crops used as green manure. [2 marks]
State any two functions of food packaging other than containing the product. [2 marks]
Define food adulteration and give one example of intentional adulteration. [2 marks]
Differentiate between mixed cropping and inter-cropping. [3 marks]
Differentiate between an organic fertilizer and a bio-fertilizer, giving one example of each. [3 marks]
Give reasons: a high yielding variety may yield less than a local traditional variety on an unirrigated, unfertilized field. [3 marks]
Give reasons: waterlogging and soil salinity often appear together in the lower parts of a canal command area. [3 marks]
Explain, with one example each, the three types of food adulteration. [4 marks]
Explain how crop rotation improves soil fertility and controls pests, using one example of a crop sequence. [4 marks]
Draw and label a diagram showing the wetting pattern of the soil under flood irrigation and under drip irrigation, and explain what the difference tells you about water use efficiency. [4 marks]
Evaluate the claim that “the Green Revolution was an unqualified success for India”. [4 marks]
Describe the colonial influence on Indian agriculture under the heads of taxation, commercial crops and the devaluation of traditional practices, and explain how these together affected soil fertility. [6 marks]
Describe Integrated Pest Management in full: its aim, the idea of the economic threshold level, the four groups of methods it uses and the order in which they are preferred, and one limitation of the approach. [6 marks]
Discuss the problems of attaining food security under the heads of production, storage and access, with Indian examples, and explain why national food security does not by itself guarantee household food security. [6 marks]
Describe land reform in India — the problems it was intended to address, the four measures adopted, and its principal successes and failures. [6 marks]
6.20 Passage-Based Questions
- Read the passage and answer the questions that follow.
A district in a semi-arid region has seen its cropping pattern change over thirty years. Millets and pulses, formerly grown together on rain-fed plots, have been largely replaced by a single irrigated cereal grown twice a year with tube well water and chemical fertilizer. Yields per hectare are now four times what they were. Farmers report that wells that were once ten metres deep must now be bored to several times that depth, that fodder for cattle is harder to obtain than it used to be, and that a new insect pest appeared five years ago and has spread quickly across the whole district. a. Identify the change in cropping pattern described, and name the practice that has replaced the earlier one. [2 marks] b. Explain why the fodder shortage and the falling water table are both consequences of that change. [3 marks] c. Explain why a new insect pest is able to spread across the whole district so quickly. [2 marks]
- Read the passage and answer the questions that follow.
A village grows tomatoes but has no cold storage and no all-weather road. Traders visit during the harvest week and offer a single price for whole loads without sorting. Growers accept, because produce left unsold spoils within two days. A survey later finds that the price paid to growers is a small fraction of the price the same tomatoes fetch in a city market eighty kilometres away, and that a substantial share of the crop is discarded before it reaches any market at all. a. Identify three inadequacies of the marketing system that this situation illustrates. [3 marks] b. Explain how grading and improved transport would each change the growers’ position. [3 marks]
- Read the passage and answer the questions that follow.
A household in a town buys loose spices and flour from a small shop because packaged brands cost more. Over a period, several people in the locality report digestive complaints. Testing of samples from the shop finds a non-permitted colouring substance in the ground turmeric and a heavy inert powder mixed into the chilli powder. The shopkeeper says he buys the goods already packed in sacks and does not know their origin. a. Classify each of the two findings by the type of adulteration involved, giving a reason. [2 marks] b. State two harmful effects of adulteration illustrated by this situation. [2 marks] c. Explain how a quality mark and a legible label would each help a buyer in this household. [2 marks]
6.21 Practice With Data
- A farmer’s costs on one hectare of irrigated wheat for a season are: seed ₹3,000, fertilizer ₹14,000, pesticide ₹5,000, irrigation and diesel ₹9,000, machinery hire ₹13,000 and hired labour ₹16,000. The yield is 4.0 tonnes per hectare and the price received is ₹20,000 per tonne.
- Calculate the total cost per hectare, the gross revenue per hectare and the margin. [2 marks]
- Recalculate the margin if the yield falls to 3.2 tonnes per hectare, the costs being unchanged. [2 marks]
- Express the fall in yield and the fall in margin each as a percentage, and explain why the two percentages differ. [2 marks]
- A rice mill processes 1,200 kg of paddy. It obtains 800 kg of rice, 240 kg of husk and 96 kg of bran, the remainder being loss and impurities.
- Calculate the percentage of the paddy recovered as rice. [1 mark]
- Calculate the quantity of loss and impurities in kilograms. [1 mark]
- State one use of the husk and one of the bran, and explain why a farmer selling paddy rather than rice receives a smaller share of the final value. [2 marks]
- Under the National Food Security Act, 2013, an eligible person is entitled to 5 kg of food grain per month. Assume an adult consumes 340 g of cereal per day and that a month has 30 days.
- Calculate the monthly cereal requirement of one adult in kilograms. [1 mark]
- Calculate the percentage of that requirement met by the entitlement, correct to the nearest whole number. [2 marks]
- State one nutritional need of the household that this entitlement does not address, and give a reason. [1 mark]
- A monitoring record from a field gives the pest population, in number of insects per plant, at weekly intervals after sowing: week 2 — 1; week 4 — 3; week 6 — 7; week 8 — 14; week 10 — 22. The economic threshold level for this pest is 12 insects per plant.
- Between which two weeks does the population cross the economic threshold level? [1 mark]
- Calculate the increase in the pest population between week 6 and week 10 as a percentage of the week 6 value. [2 marks]
- Explain why a farmer following Integrated Pest Management would not have sprayed at week 4, even though the pest was already present. [2 marks]
- A concentration of a persistent pesticide is measured as 0.02 mg per kg in pond water, 0.4 mg per kg in small fish, 3.6 mg per kg in large fish and 18 mg per kg in the tissue of a fish-eating bird.
- Calculate how many times greater the concentration in the bird is than that in the water. [1 mark]
- Name the process the figures illustrate and explain in one sentence why the concentration rises at each level. [2 marks]
- State one property a pesticide must have for this pattern to occur. [1 mark]