There is a fixed amount of land on Earth and a growing number of people who need feeding from it. Nothing in this topic makes sense until you have that tension in your head. This page covers how much land we have, who gets to use it, who loses out, and the different ways farms are organised around the world.
📘 What you need to know
Land is a finite resource — it cannot be expanded — so efficient land use matters.
About 70% of ice-free land is used for agriculture and forestry.
Population growth increases food demand, and urbanisation converts farmland into towns, so land available per person keeps falling.
Not all land is suitable for crops. Crop land needs to be fertile, flat and have an adequate water supply.
Agricultural land covers all farming. Arable land is only the part used for growing crops.
Marginalised groups — Indigenous peoples, low-income groups, women farmers, people in low-income countries — often have limited access to land, and land-use decisions can increase inequality.
Agricultural systems vary globally because soil and climate vary.
Systems are classified by outputs, by reasons for farming, and by types of input.
Land is finite
Land is limited and cannot be expanded. That single fact drives everything else. Roughly 70% of ice-free land is already used for agriculture and forestry, so there is no large reserve of unused good land waiting to be farmed.
Meanwhile two things are squeezing what we have:
As the human population grows, demand for food rises, putting pressure on the land available for food production.
Urbanisation converts agricultural land into urban areas, reducing the land available for food production per capita.
Note what the graph does not say: total farmland has not collapsed. What has collapsed is the share available to each person, because the population grew faster than the farmland.
Which land can actually be farmed
Not all land is suitable for crop production. To grow crops, land must be fertile, reasonably flat, and have an adequate water supply. Land that fails those tests is called marginal.
Problem
Why it rules out crops
Steep slopes
High risk of erosion, and machinery is difficult or dangerous to use
Nutrient-poor soils
Cannot support crop growth without significant fertilisation, which costs money and energy
Land like this is often used for livestock instead. In the UK, hilly areas such as Eryri (Snowdonia) in Wales and the Scottish Highlands are used for sheep grazing precisely because conditions are unsuitable for arable farming.
Marginal land is not useless land. It is land where the wrong use would destroy it, which is why grazing rather than ploughing is the sensible choice on a steep hillside.
🧩
Agricultural or arable?
Arable starts with A, and so does A ploughed field. Agricultural land covers all farming, including pastures, orchards and vineyards. Arable land is specifically for growing food crops and needs fertile soil and suitable planting conditions.
Who loses out in land-use decisions
Land is not just a physical resource. It is owned, allocated and fought over, and the people with the least power tend to end up with the least land.
Marginalised groups
These include Indigenous peoples, low socio-economic status groups, women farmers and people in low-income countries.
They often have limited access to land and resources.
Land-use policies can increase inequalities, and marginalised groups are more vulnerable to changes and restrictions because they have fewer alternatives to fall back on.
Example
What is happening
Effect on people
Dalits in India
Members of a lower caste face significant barriers to land ownership and to agricultural resources
Limits their ability to improve their economic status and sustain their livelihoods
Maasai in Kenya and Tanzania
Land encroachment from expanding agriculture and tourism projects
Threatens a traditional way of life built around moving livestock
Deforestation in the Amazon
Forest cleared for agricultural expansion, affecting Indigenous groups such as the Yanomami
Loss of biodiversity and of traditional lands
Land grabs in Africa
Foreign investors acquire large areas for industrial-scale agriculture
Displaces local farmers and communities and damages their food security
Urban sprawl in China
Rapid urbanisation consumes agricultural land
Reduces rural communities’ access to arable land
Indigenous land rights are often ignored in favour of large-scale agricultural projects, and that is the pattern connecting every row of that table. In an evaluation question, do not just describe the land use — say who benefits and who carries the cost. That is what separates a mid-band answer from a top-band one in ESS.
Why farms differ around the world
Agricultural systems vary globally because soil and climate vary. Soils in different biomes support different crop types and different productivity levels.
Tropical soils may be nutrient-poor, which limits the crops that can be grown successfully without heavy fertilisation. In Brazil, nutrient-poor tropical soils need heavy fertilisation for crops such as soybeans.
Temperate climates with fertile soils can support diverse crops. In the UK, the temperate climate supports a variety of crops such as wheat and barley.
Classifying agricultural systems
There are three ways to sort farming systems, and the exam can ask for any of them.
These are not competing labels. Every farm can be described using all three columns at the same time, and a good exam answer usually does exactly that.
By what comes out of the system
Arable farming — growing crops, for example wheat and rice.
Pastoral or livestock farming — raising animals, for example cattle and sheep.
Mixed farming — combining crops and livestock.
Monoculture — growing a single type of crop.
Diverse farming — growing multiple types of crops.
By the reason for farming
Commercial farming — producing food for sale.
Subsistence farming — producing food for the farmer’s own use.
Sedentary farming — farmers stay in one place.
Nomadic farming — farmers move with their livestock.
By the inputs required
System
Defining feature
Example
Intensive
High inputs of labour, capital and technology
Dairy farming in the Netherlands
Extensive
Low input per unit area
Sheep farming in Australia
Irrigated
Requires an artificial water supply
The Central Valley, California, where large-scale irrigation supports almonds, grapes and tomatoes in a semi-arid region
Rain-fed
Relies on natural rainfall
Wheat farming in Canada
Soil-based
Traditional farming in soil
Vegetable farms in the UK
Hydroponic
Growing plants without soil, in nutrient solutions
Hydroponic lettuce farms and vertical farms in urban areas
Organic
Avoids synthetic chemicals
Organic tea plantations in India using natural fertilisers, compost and biological pest control
Inorganic
Uses synthetic chemicals and fertilisers
Large-scale corn farms in the US
What the choice of system implies
Pillar
How agricultural systems differ
Economic
Varies with farming type and market access. Monoculture can be profitable but is risky because a single disease can wipe out the crop. Diversified farming reduces that risk and can be more economically sustainable
Social
Systems affect community stability and employment differently. Subsistence farming supports local communities but can limit economic growth. Commercial farming can create jobs but may displace small farmers
Environmental
Intensive farming can lead to soil degradation and pollution. Organic farming promotes biodiversity and soil health. Extensive farming generally has a lower environmental impact per unit area of land
A caution about “extensive is better”. Extensive farming has a lower impact per unit area, but it also produces less food per unit area, so it may need more land overall to produce the same amount of food. Whenever you compare systems, be clear whether you are measuring impact per hectare or impact per tonne of food. Examiners reward that distinction.
Worked examples
WE 1
Explain the fall in arable land per capita
Explain why the area of arable land available per person has fallen since 1970. (3 marks)
Point 1: the denominator grows
The global population has risen from around 4 billion to over 8 billion, so the same land is shared between far more people.
Point 2: the numerator shrinks
Urbanisation converts agricultural land into built-up areas, reducing the total arable area available.
Point 3: no room to expand
Land is finite and about 70% of ice-free land is already used for agriculture and forestry, so new farmland cannot simply be created.
More people, less farmland, and no spare land to adduse the phrase per capita and show you know it is a ratio — both parts of it are moving
WE 2
Classify a farming system
A farm in Australia keeps sheep across a very large area, relies on natural rainfall, uses few workers and sells its wool and meat. Classify this system in three ways. (3 marks)
By outputPastoral, because the output is livestock rather than crops.
By reasonCommercial, because the products are produced for sale rather than for the farmer’s own use.
By inputExtensive and rain-fed, because inputs per unit area are low and it depends on natural rainfall.
Pastoral, commercial, extensive and rain-fedgive a reason with each label — the mark is for the justification, not the word
WE 3
Evaluate the impact of land-use change on marginalised groups
Outline how land-use decisions can increase inequality, using named examples. (4 marks)
Point 1: unequal access to start with
Marginalised groups such as Indigenous peoples, women farmers and low-income communities already have limited access to land and resources.
Point 2: policy makes it worse
Land-use policies often favour large-scale projects, and these groups have fewer alternatives, so restrictions hit them hardest.
Point 3: named example
Land grabs in Africa, where foreign investors acquire large areas for industrial agriculture, displace local farmers and damage their food security.
Point 4: second named example
The Maasai in Kenya and Tanzania have faced land encroachment from agriculture and tourism, threatening their traditional way of life.
Existing inequality plus land-use change equals deepening inequalitytwo named examples from different continents reads far stronger than four general statements
💡 Exam tips
Know the figure: about 70% of ice-free land is used for agriculture and forestry.
Be precise about agricultural versus arable land — it is a favourite examiner trap.
Learn three requirements for crop land: fertile, flat, adequate water.
Have two or three named examples of land-use impacts on marginalised groups ready to use.
Be able to define monoculture, subsistence, intensive and extensive in one sentence each.
When comparing systems, always state whether you mean per hectare or per unit of food produced.
⚠ Common mistakes
Using arable and agricultural as synonyms. All arable land is agricultural; the reverse is not true.
Confusing intensive with large. Intensive means high inputs per unit area, not a big farm. An intensive farm can be tiny.
Saying total farmland is collapsing. The sharp fall is in land per person.
Treating marginal land as wasted land. It is usually grazed, forested or left as habitat, all of which are land uses.
Listing farm types without classifying them. The question usually wants the category, not just the name.
Vague examples. “Some countries in Africa” earns little. Name the place and the process.
Up next: Traditional Versus Industrial Farming — nomadic pastoralism and slash-and-burn, then the green revolution that changed farming permanently, and what it cost.
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