AP Human Geography, AP exams, 12–17%

Unit 5: Agriculture and Rural Land-Use Patterns and Processes

Unit 5 covers agricultural origins, regions, and practices, along with rural settlement and survey patterns. The von Thünen model and the Green Revolution anchor much of the analysis. Environmental and social consequences of modern agriculture, including food insecurity, close the unit.

Position: 5 of 7 units
Published weighting: 12–17% in the official framework
Topics covered: 8 topics in this guide

What is covered

Topics inside this unit.

These topics describe the scope students most often review for this part of AP Human Geography. Treat them as a study checklist rather than an exhaustive list of what a single exam form can sample.

Agricultural hearths and diffusion: Independent origins of domestication and the spread of crops and techniques along trade and migration routes.
Settlement patterns and survey methods: Clustered, dispersed, and linear settlements, and metes and bounds, township and range, and long-lot survey systems.
Agricultural revolutions: The second agricultural revolution and the Green Revolution, including their yield gains and their uneven effects.
Agricultural production regions: Subsistence and commercial agriculture, intensive and extensive practices, and the climates that support each.
The von Thünen model: How land rent and transportation cost sort agricultural land use into rings around a market, and why the real world departs from it.
Global agricultural systems: Agribusiness, commodity chains, export agriculture, and the role of global markets in local farming decisions.
Consequences of agricultural practices: Soil degradation, irrigation and water use, land-cover change, and debates over sustainable and organic agriculture.
Food security and access: Food insecurity, food deserts, distribution problems, and the role of women in agricultural labor.

Study tips

How to practice Agriculture.

Section-specific guidance that follows from how this material is usually tested.

Draw the von Thünen rings from memory and be ready to explain one reason the real pattern differs.
Sort agricultural types by climate region; the exam often provides a map and expects that link.
Balance benefits and drawbacks of the Green Revolution, since prompts usually want both.

Where this fits

Unit 5: Agriculture and Rural Land-Use Patterns and Processes is 5 of 7 units in the AP Human Geography guide, and it carries a published weighting of 12–17% in the official framework. Use the full guide to balance it against everything else you have to review.

Back to the AP Human Geography guide Official exam information

Sample Agriculture questions

Practice questions, not yet expert-reviewed

Original practice questions written to the published framework for this section. No expert has reviewed them, and they are not taken from any official exam. Try each one before you open the answer.

Question 1Foundational
In von Thünen's model of agricultural land use, which activity occupies the ring closest to the central market?
1. AMarket gardening and dairying
2. BForestry
3. CGrain farming
4. DLivestock ranching
Show answer
Answer: A. Market gardening and dairying
Perishable, heavy, and frequently delivered products such as milk and fresh vegetables occupy the innermost ring because their transport costs rise fastest with distance. Livestock ranching is the tempting distractor, but animals are durable and can even be walked to market, so ranching sits in the outermost ring where land is cheapest.
Key insight: Von Thünen ranks land use by transport cost per unit of distance, not by how profitable the crop is in the abstract.
Question 2Foundational
Which land survey system divided much of the interior United States into a grid of square townships and sections?
1. AThe township and range system
2. BThe metes and bounds system
3. CThe long-lot system
4. DThe open-field system
Show answer
Answer: A. The township and range system
Township and range imposed a rectangular grid tied to baselines and meridians, which is why farm fields and county roads across the Midwest meet at right angles. Metes and bounds is the tempting distractor, but it defines parcels by natural landmarks and directions and produces the irregular property shapes common in the eastern states.
Key insight: You can read the survey system from the air: grids mean township and range, irregular parcels mean metes and bounds, and narrow strips off a river mean long lots.
Question 3Intermediate
The Green Revolution raised cereal yields in Mexico and South Asia chiefly through which combination of changes?
1. AHigh-yield seed varieties paired with fertilizer, pesticides, and irrigation
2. BClearing large areas of new farmland from forest and grassland
3. CA return to traditional seed stock and organic methods
4. DReplacing cereal crops with export fruit and vegetables
Show answer
Answer: A. High-yield seed varieties paired with fertilizer, pesticides, and irrigation
The Green Revolution raised output per hectare by combining bred high-yield wheat and rice with chemical inputs and controlled water, rather than by farming more land. Clearing new farmland is the tempting distractor, but the point of the program was to intensify existing fields, and its criticisms concern input costs, groundwater depletion, and uneven benefits for smallholders.
Key insight: The Green Revolution intensified rather than expanded agriculture, which is why its costs show up as water and chemical dependence rather than as lost forest.
Question 4Intermediate
True or False: Intensive agriculture applies large amounts of labor or capital to a relatively small area of land, while extensive agriculture spreads fewer inputs across a much larger area.
1. ATrue
2. BFalse
Show answer
Answer: A. True
The intensive and extensive labels describe input concentration per unit of land, not whether farming is commercial or subsistence. That is why both categories contain examples of each kind: wet rice farming and market gardening are intensive, while pastoral nomadism and cattle ranching are extensive.
Key insight: Intensive versus extensive answers how much goes into each hectare; subsistence versus commercial answers where the harvest goes.
Question 5Advanced
A dryland farming region has irrigated its fields heavily for decades. Yields are now falling and white mineral crusts have appeared on the soil surface, even though rainfall has not changed. Which consequence of irrigation best explains this decline?
1. ASalinization of the soil
2. BDesertification caused by overgrazing
3. CA shift from intensive to extensive farming
4. DLoss of farmland to suburban sprawl
Show answer
Answer: A. Salinization of the soil
Irrigation water carries dissolved salts, and in a dry climate the water evaporates or is taken up by plants while the salts stay behind and concentrate in the root zone until crops can no longer draw water from the soil. Overgrazing-driven desertification is the tempting distractor because it also degrades dryland soil, but it works by stripping vegetation cover rather than by adding water, and it would not leave salt crusts on irrigated fields.
Key insight: Irrigation can raise yields for a generation and ruin the same field afterward, which is why water management is the standard example of a sustainability trade-off in commercial agriculture.

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Unit 5: Agriculture and Rural Land-Use Patterns and Processes