How agriculture and food production work: from seed to plate
The food value chain, the types of farms, how each player earns money, and the metrics that matter.
Industry brief, with a one-minute summary: Agriculture and foodKey takeaways
- A farm turns inputs (seed, fertilizer, water, labor, machines) into crops or animals, and sells them at prices it does not control.
- Yield: output per hectare (for example tonnes of wheat per hectare). One hectare is 10,000 square metres, about 2.5 acres.
- Yield gap: the difference between the yield a farm gets and what is possible with good practice in the same place.
- Farmgate price: the price the farmer receives at the farm.
Key idea
A farm turns inputs (seed, fertilizer, water, labor, machines) into crops or animals, and sells them at prices it does not control. Its income depends on yield per hectare, the price it receives, and input costs. Along the chain, traders, processors and retailers add value and take margin.
- From seed to plate
- InputsSeeds, fertilizer, crop protection (pesticides), animal feed, machinery, water, credit, advice
- FarmingCrops, livestock, dairy, poultry, fisheries and aquaculture
- Smallholders: very small farms, often under 2 hectares, common in India and Africa
- Large commercial farms: common in the Americas, Australia, parts of Europe
- Aggregation and tradingCollect from many farms, store, transport, trade across borders
- ProcessingMilling, crushing oilseeds, dairy, meat, packaged food
- DistributionWholesale markets, cold chain, importers
- Retail and food serviceShops, supermarkets, restaurants
| Player | How it makes money | Main costs | What decides profit |
|---|---|---|---|
| Farmer | Sells crops or animals at market or government support prices | Seed, fertilizer, crop protection, water and power, machinery, labor, land rent | Yield, price received, input costs, weather |
| Input company | Sells seed, fertilizer, crop protection, machinery | R&D (seeds and crop protection), energy and gas (fertilizer), distribution | Farmer income and crop prices; innovation; for fertilizer, gas prices |
| Trader | Small margin on very large volumes, plus earnings from storage, logistics and timing | Storage, freight, financing, risk management | Volume, logistics network, managing price risk |
| Processor | Margin between raw material cost and product price | Raw materials (the largest), plants, energy, packaging | Capacity utilization, yields in processing, brand |
| Retailer and food service | Margin on food sold | Stores, staff, waste, rent | Volume, waste and shrink, price |
So-what
Farmers usually receive a small share of what the consumer pays. Cases about farmer income often look at who takes the rest and why.
Most farms in India and sub-Saharan Africa are small. India's Agriculture Census 2015-16 found that about 86 percent of land holdings were small or marginal, meaning under 2 hectares. Smallholders often lack credit, storage, irrigation and access to good markets, so they may sell right after harvest when prices are lowest. Cooperatives and farmer producer organizations help them buy inputs and sell together. India's Amul dairy cooperative is a well-known example of farmers owning the processing step.
Key metrics, in plain words
- Yield: output per hectare (for example tonnes of wheat per hectare). One hectare is 10,000 square metres, about 2.5 acres.
- Yield gap: the difference between the yield a farm gets and what is possible with good practice in the same place. FAOSTAT data show large gaps, for example many sub-Saharan countries get far lower maize yields than the US.
- Farmgate price: the price the farmer receives at the farm.
- Input cost per hectare, and net income per hectare.
- Post-harvest loss: the share of food lost between harvest and sale (spoiled, damaged, eaten by pests).
- Feed conversion ratio (livestock): kg of feed per kg of meat or eggs produced. Lower is better.
- Self-sufficiency ratio: the share of a country's food it produces itself.
A Gulf country consumes 4 million tonnes of wheat a year and produces 0.4 million tonnes. What share of its wheat must it import, as a decimal? (Assume no change in stocks.)
Why do many smallholder farmers sell their crop right after harvest, even though prices are usually lowest then?
Sources for this lesson (3)
- Recognized public explanations of case-interview concepts and frameworks
- FAOSTAT, crops and livestock production data
- Government of India, Agriculture Census
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