Extensive commercial grain cultivation

Topic: Primary Activities: Gathering, Pastoralism, Agriculture and Mining · NCERT: Class 12, Ch 4 "Primary Activities"

Meaning

Extensive commercial grain cultivation is farming on very large, machine-run farms in the dry interior grasslands of the mid-latitudes. The main crop is wheat, and it is grown mostly for sale and export, not to feed the farmer's family. It matters because these grasslands are the world's breadbaskets. They produce the extra grain that many import-dependent countries live on. That makes the topic both a map question and a food-security question.

Explanation

The three words in the name

• Extensive: the farm covers a lot of land, but the farmer puts little labour, fertiliser and money into each hectare.

• Intensive farming is the opposite: a small plot with heavy labour and inputs on each hectare, as in the rice fields of the Ganga delta.

• Commercial: the crop is grown for the market, often for export.

• Grain:
• Wheat is the main crop.
• The other crops are corn (maize), barley, oats and rye.
• Rice is not grown in this system.

How the farms work

• The farms are very large. In the Prairies and the Steppes, one farm often covers hundreds to thousands of hectares.
• Machines do the work from start to finish: ploughing, sowing, spraying and harvesting.
• A combine harvester (NCERT Fig. 4.11) cuts, threshes and cleans the grain in one pass. It does three jobs at once.

• Combine crews travel across the wheat belt and harvest many hectares in a single day.

• Few workers live there. Settlement is thin, and farm houses lie far apart.

Why yield per acre is low but yield per person is high

This is NCERT's "why" question.

• Land is plentiful and cheap
• → farmers spread their effort over a huge area

• → they do not try to get the most grain out of each hectare.

• Labour is scarce

• → machines replace people

• → one worker manages a very large area, so output per person is very high.

• Rain is limited and unreliable

• → heavy fertiliser or irrigation on every hectare does not pay

• → inputs per hectare stay low, so output per hectare stays low.

• Result: low yield per acre and high yield per person. Large grain surpluses are left over for export.

Conditions it needs

• Location: the interior (far from the sea), semi-arid grasslands of the mid-latitudes.
• Semi-arid means fairly dry: too wet to be a desert, but too dry for thick forest.

• Mid-latitudes are the belts between the tropics and the polar regions, roughly 30° to 55° north and south.

• Natural vegetation: temperate grasslands. These are treeless plains of tall or short grass. Wheat, oats and corn have replaced much of the wild grass [7].

• Chernozem soil: the name comes from the Russian words for "black earth". It is a dark grassland soil, rich in humus (decayed plant matter), and is widely used for cereals or livestock [6].
• How it forms: grass roots die every year and add humus → there is too little rain to wash the humus away → a thick, dark, fertile top layer builds up.
• Climate it needs: about 450–600 mm of rain a year, falling in spring or early summer, with cold winters and short, hot summers [6].

• How rich it can be: in colder areas the top layers can be up to 2 metres thick, with up to 16% humus by mass [6].

• Flat land, so large machines can work easily.

• Transport: railways and ports built in the 19th century carried the grain to distant markets.

Where it occurs

World: the breadbaskets (NCERT Fig. 4.12, a common map question) A breadbasket is a region that grows far more grain than its own people eat, so it can supply other regions.

Region	Country / continent	Location
Steppes	Eurasia: Ukraine, southern Russia, northern Kazakhstan	A grassland belt from the Black Sea eastward into Central Asia
Prairies	Canada and the USA	The Great Plains, east of the Rocky Mountains. The Canadian part covers Alberta, Saskatchewan and Manitoba
Pampas	Argentina	Flat grassland around Buenos Aires, near the Río de la Plata
Velds	South Africa	Grassland on the high interior plateau (the Highveld)
Downs	Australia	Temperate grassland in eastern Australia, west of the Great Dividing Range (for example, the Darling Downs)
Canterbury Plains	New Zealand	The eastern South Island, east of the Southern Alps

• Local names for the same kind of land: prairie in North America, pampa in Argentina and steppe in Asia and eastern Europe [7].
• Exporters today:
• Russia is the world's largest wheat exporter.
• In 2021, Ukraine was the sixth-largest wheat exporter. It exported about 20 million tonnes of wheat and meslin, roughly a 10% share of world exports [5]. (Meslin is wheat and rye sown and harvested together.)

• The other big exporters are the EU, Canada, Australia, the USA and Argentina, which include the Prairie, Downs and Pampas breadbaskets.

• Black Sea grain route: ships load at Novorossiysk (Russia) or Odesa (Ukraine) → Bosporus → Dardanelles → Mediterranean.

• The Turkish Straits (Bosporus and Dardanelles) are a chokepoint: a narrow sea passage that a large share of world trade has to use.

• Black Sea Grain Initiative (BSGI):

• It was brokered by the UN and Turkey in July 2022, after Russia invaded Ukraine in February 2022 and shipping stopped.
• It gave ships a safe route out of three Ukrainian ports, including Odesa.
• A Joint Coordination Centre in Istanbul inspected the ships.
• By mid-July 2023, about 32.8 million tonnes of grain and food had been exported [2]. In all, nearly 33 million tonnes reached 45 countries on three continents [3].
• It ended on 17 July 2023, when Russia refused to renew it [4].
• After that, Ukraine opened its own sea corridor along the western Black Sea coast. Check its current status before the exam.

India: India does not use this system. Its wheat comes from intensive, irrigated farming in Punjab, Haryana and Uttar Pradesh.

Don't confuse with

• Intensive subsistence farming (for example, the Ganga plains): small plots, plenty of family labour and high yield per hectare but low yield per person. Extensive grain farming is the exact reverse.
• Amazon Basin: it is not an extensive grain region (NCERT exercise 1(v)). It is hot, very wet equatorial rainforest with leached soils, meaning rain has washed the nutrients out.
• Temperate grassland vs. the farming system: the steppe, prairie and pampa are the natural vegetation type [7]. Extensive commercial grain cultivation is the farming system that has largely replaced that grass.
• Indian wheat farming: it grows the same crop, but by the intensive, irrigated method, not the extensive, mechanised one.

Prelims Hooks

• Low yield per acre, high yield per person. The reasons: plenty of land, scarce labour and limited rain.
• The main crop is wheat. Corn, barley, oats and rye are also grown. Rice is not part of this system.
• Matching pairs: Pampas → Argentina; Velds → South Africa; Downs → Australia; Canterbury Plains → New Zealand (eastern South Island); Prairies → Canada and the USA; Steppes → Eurasia.
• Trap: the Amazon Basin is not an extensive commercial grain region.
• Chernozem means "black earth". It is a humus-rich grassland soil that forms where yearly rain is about 450–600 mm [6].
• The BSGI was brokered by the UN and Turkey. It ran from July 2022 to 17 July 2023, and nearly 33 million tonnes went to 45 countries [2][3][4].

Mains Points

• Why it grew where it did (GS-I): four things came together in the mid-latitude interior grasslands:
• few people and plenty of land
• flat land that suits machines
• fertile chernozem soil
• 19th-century railways and ports to carry grain to market.

The result is a "high output per worker, low output per hectare" system that produces surplus grain for export.

• Limits and environmental cost (GS-I/III):
• Rain is semi-arid and unreliable, so harvests swing from year to year.
• Ploughing the grassland exposes the soil to wind erosion. Example: the Dust Bowl of the US Great Plains in the 1930s, when drought and heavy ploughing let the wind blow the dry topsoil away.

• Growing the same crop every year wears out the humus.

• Food security (GS-III): the import-dependent Near East and North Africa rely on a few breadbaskets and one chokepoint.

• In 2021, 40 countries relied on Russia and Ukraine for more than 30% of their wheat imports [5].
• On average over 2016/17–2020/21, Egypt, Turkey, Bangladesh and Iran each got 60% or more of their wheat imports from these two countries [5].
• In 2021, Eritrea got all of its wheat imports from them: 53% from Russia and 47% from Ukraine [5].
• By July 2023, WFP was buying 80% of its global wheat from Ukraine. It had shipped more than 725,000 tonnes to Afghanistan, the Horn of Africa and Yemen [3].
• Responses: buy from many different exporters, keep strategic grain stocks and develop other land and river routes. For India, the crisis shows why buffer stocks and export controls matter when the world market is tight.

Related concepts

• Black Sea grain trade

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• Extensive commercial grain cultivation and the world's breadbaskets