Spatial Organization
of Agriculture
Explore how geographic models explain the distribution of farming activities, from Von Thünen's rings to the global food system.
AP Human Geography
What Is Agricultural Geography?
Agricultural geography studies where farming takes place, why certain crops are grown in specific locations, and how economic forces, culture, and the physical environment shape agricultural patterns across the landscape.
Site Factors
Climate, soil quality, terrain, and water availability at a specific location
Situation Factors
Distance to markets, transportation networks, labor supply, and land costs
Why Location Matters in Agriculture
Farmers make rational decisions about what to produce based on the relationship between profit potential and distance to market. Perishable goods must be near consumers; durable commodities can be farmed further away.
1
Transportation costs increase with distance, reducing profit margins for bulky or perishable goods.
2
Land rent decreases with distance from the city center, making extensive farming viable far from markets.
3
Perishability dictates that dairy and vegetables must be produced close to population centers.
Essential Vocabulary
Bid-Rent Theory
Land users compete for locations: price declines as distance from center increases
Extensive Farming
Large area, low labor input per unit (ranching, grain). Profitable on cheap, distant land
Intensive Farming
Small area, high labor/capital input per unit (market gardens, dairy). Needs proximity to market
Von Thünen's Isolated State Model
The Land Rent Curve
Assumptions vs. Reality
| Factor | Von Thünen Assumes | Real World |
|---|---|---|
| Landscape | Flat, uniform plain | Mountains, rivers, varied terrain |
| Transport | Equal cost in all directions | Highways, railways distort cost |
| Markets | Single central city | Multiple cities, global trade |
| Technology | Uniform (1826 era) | Refrigeration, GMOs, irrigation |
| Government | No intervention | Subsidies, tariffs, zoning laws |
Intensive vs. Extensive Agriculture
| Characteristic | Intensive | Extensive |
|---|---|---|
| Land per farm | Small | Very large |
| Labor input | High per hectare | Low per hectare |
| Yield per area | High | Low |
| Distance to market | Close | Far |
| Examples | Dairy, market gardens, rice paddies | Ranching, wheat farming, shifting cultivation |
How to Apply Von Thünen
1
Identify the market center. Locate the city or port that consumers and buyers are concentrated around.
2
Rank products by perishability. The more perishable or bulky the product, the closer it must be produced to the market.
3
Consider transportation costs. Higher transport cost per unit means the rent curve drops off more steeply.
4
Adjust for real-world distortions. Rivers, highways, and refrigeration technology stretch or compress the rings.
5
Predict land use zones. The product with the highest bid-rent at each distance wins that land.
Example: The U.S. Midwest
Real-World Distortions
Von Thünen at the Global Scale
The model can be applied at multiple scales: local (around a single city), regional (the U.S. Midwest), or even global (with Europe as the historical "market center").
Zone 1: Local
Dairy farms and truck gardens ringing cities like London, Paris, or Tokyo
Zone 2: Regional
Grain belts in the interior of continents: U.S. Great Plains, Ukrainian steppe
Zone 3: Global
Ranching on the global periphery: Argentina, Australia, sub-Saharan Africa
Beyond Von Thünen: Other Models
Whittlesey's Regions
Classified world agriculture into 13 types based on what is produced, how, and for whom
Boserup's Theory
Population pressure drives agricultural intensification: more people = more innovation
Green Revolution
High-yield seeds, fertilizers, and irrigation dramatically increased output in developing nations
Dependency Theory
Core nations exploit peripheral agricultural labor, maintaining global inequality
Agricultural Revolutions Over Time
1
First Agricultural Revolution (~10,000 BCE): Domestication of plants and animals. Shift from hunting-gathering to sedentary farming in the Fertile Crescent.
2
Second Agricultural Revolution (~1700s-1900s): Mechanization, seed drill, crop rotation. Enabled the Industrial Revolution by freeing labor from farms.
3
Third Agricultural (Green) Revolution (~1960s-present): High-yield varieties, chemical fertilizers, irrigation. Dramatically increased food production in Asia and Latin America.
4
Fourth Revolution? (emerging): GMOs, precision agriculture, vertical farming, and biotechnology transforming where and how food is produced.
Common Mistakes
✕ Ignoring Scale
Von Thünen applies at local, regional, and global scales. Don't assume it only works around one city.
✕ Treating the Model as Literal
The rings are an idealized pattern. Real landscapes have rivers, highways, and political borders that distort them.
✕ Confusing Intensive/Extensive
Intensive = high input per unit area (near market). Extensive = low input per unit area (far from market). Don't flip them.
Question 1 of 5
In Von Thünen's model, which type of agriculture would be located in the ring closest to the market center?
Dairy products and fresh vegetables are perishable and bulky, making transportation costs very high. Farmers producing these goods must be closest to the market to remain profitable.
Question 2 of 5
Which assumption is NOT part of Von Thünen's original model?
Von Thünen's model assumes a single, isolated market on a uniform plain. Multiple cities and highway networks are real-world modifications that the original model does not account for.
Question 3 of 5
A river running from a city to the coast would most likely cause Von Thünen's rings to:
Rivers reduce transportation costs along their path, allowing farmers farther away to still profitably reach the market. This stretches the rings outward along the corridor, creating an elongated pattern rather than perfect circles.
Question 4 of 5
Boserup's theory argues that agricultural change is driven primarily by:
Ester Boserup argued that population growth is the primary driver of agricultural innovation. As populations increase, farmers are forced to find ways to produce more food from the same land: leading to intensification, new techniques, and higher yields.
Question 5 of 5
Which of the following best describes extensive agriculture?
Extensive agriculture uses large areas of land with relatively low labor and capital input per unit area. Examples include ranching and wheat farming. This type of farming is viable on cheaper land far from markets because transportation costs per unit are low for durable, non-perishable products.