Unit 5 · Topic 5.6 · about 30 minutes · 7 parts · 12 scored checks, 3 of them multiple choice, plus 2 from earlier lessons

AP Human Geography 5.6: Agricultural Production Regions

Built by Tanner Crow from College Board's course framework · Every answer key independently checked

Unit 5: 12 to 17% of the multiple-choice section

What you'll be able to do

Explain how economic forces, such as land costs and access to markets, shape whether farms grow for their own households or for sale, whether they specialize in one crop, and whether they farm intensively or extensively.

Key vocabulary

Term	What it means	The exam trap
Subsistence agriculture	Farming mainly to feed the farmer's own household or community, with little of the harvest sold.	Do not confuse it with extensive farming: a subsistence farm can work its land very intensively.
Commercial agriculture	Farming mainly to sell crops or animals for profit, often to buyers far from the farm.	Commercial and intensive are different ideas: a cattle ranch is commercial but works its land lightly.
Agricultural production region	An area defined by the kind of farming its farms practice, such as how far they grow for their own use or for sale.	A region's boundaries are drawn by geographers from farming data; they need not follow country borders.
Monoculture	Growing a single crop across a field or farm at one time, instead of several crops mixed together.	A monoculture can be a tree crop, such as oil palms, not only a field crop like wheat.
Monocropping	Growing the same crop on the same land year after year, with no rotation to other crops.	Monoculture and monocropping are easy to mix up, so learn the question each one answers.
Intensive farming	Farming that puts a lot of labor and capital into each hectare of land to get a high output from it.	Intensive is not the same as commercial; a subsistence rice farmer working by hand can farm intensively.
Extensive farming	Farming that puts little labor and capital into each hectare, usually across a large area, with a low output per hectare.	Low output per hectare is not low income: an extensive farm can still earn a profit.
Land costs	What a farmer pays to use land, as a yearly rent per hectare or a price to buy it.	Read the unit: a yearly rent per hectare and a price to buy a hectare are very different numbers.
Bid-rent theory	The theory that the amount a land user will pay for land falls with distance from a market, so each piece of land goes to the use that can pay the most for it.	It applies to farmland around a market and to land inside a city, so read the question for the scale.

A map of hypothetical Country L divided into three farming regions from north to south. In the northern highlands, farm families sell 15 percent of their harvest and eat the rest. In the central valley they sell 55 percent. On the southern coastal plain they sell 90 percent. The more of its harvest a region sells, the darker it is shaded. — Country L (hypothetical): from mostly subsistence to mostly commercial.

Part 1 Think first Which farmer works each hectare harder?

Make a guess before you read. A guess you have to fix is one you remember.

Predict first

Two hypothetical farmers each rent 50 hectares. Farmer A's land is 3 km from a large city, where land rents for 1,500 dollars per hectare each year. Farmer B's land is 150 km away, where it rents for 20 dollars per hectare. Which farmer do you expect to put more labor, fertilizer and machinery into each hectare?

In short. Agricultural production regions differ in how far their farms grow food for their own households (subsistence) or for sale (commercial), and land costs, as bid-rent theory explains, help decide whether farms use land intensively or extensively.

Subsistence farming feeds the farm's own household; commercial farming grows for sale, often as monoculture or monocropping; a region is defined by where it falls between mostly subsistence and mostly commercial.
Intensive farming puts a lot of labor and capital into each hectare; extensive farming puts little into each of many hectares.
Under bid-rent theory, land costs most near the market, so intensive uses that can pay high rents take the land there and extensive uses take cheap land far away; climate, soil and policy also play a part.

Part 2 Learn it What farms grow, for whom, and how hard they work the land

2a. Subsistence and commercial agriculture

Farms differ first in what the harvest is for. In subsistence agriculture, farmers grow food mainly for their own household or community to eat. They may sell or trade a small surplus, but most of the harvest never reaches a market. In commercial agriculture, farmers grow crops or raise animals mainly to sell, for profit, often to buyers far away, such as a grain company, a meat packer or a city market.

Economic forces push farms toward one or the other. A family with little land, no road to a market and no cash to buy food grows what it eats. Where roads, buyers and good prices make selling pay, farms turn to the crops the market wants.

Geographers describe agricultural production regions by the extent to which their farms follow each practice. Regions fall along a range from mostly subsistence to mostly commercial, and most hold some farms of each kind. The central valley on the map at the top of the page, where farms sell about half of their harvest, is a mixed region. So judge a region by what most of its farms do with most of their harvest, not by its exceptions.

Quick check · Sort it

Each card describes a farm in a hypothetical country. Tap a card, then the kind of agriculture it practices.

Subsistence agriculture

Commercial agriculture

2b. Monoculture and monocropping

Commercial farms often specialize, in two related ways.

Monoculture is growing a single crop across a field or a whole farm at one time, instead of several crops mixed together. A plantation covered in oil palms is a monoculture, and so is a farm planted wall to wall in soybeans.

Monocropping is growing the same crop on the same land year after year, with no rotation to other crops.

The two overlap, and many books use the words almost as one, but they answer different questions. Monoculture describes the land at one moment: how many crops are growing on it now? Monocropping describes the same land over many years: does the crop ever change?

Economic forces favor both. A farm that grows one crop for sale needs one set of machines and one set of skills, and it can sell in bulk to one kind of buyer. Subsistence farms, which must feed a household through the year, more often grow several crops together. Specializing has costs too: a single crop draws its own pests and uses up particular soil nutrients, so it leans on fertilizer and pesticides.

Quick check · Decide and justify

Hypothetical Farm R plants all 800 of its hectares in corn, on the same fields every year, as it has for 20 years, and sells the whole harvest to a grain company. Does Farm R's practice reflect commercial agriculture?

Which reason supports your answer?

2c. Intensive and extensive farming

Farms also differ in how hard they work each hectare. Intensive farming puts a lot of labor and capital (machines, fertilizer, buildings, irrigation) into each hectare to get a high output from it. Extensive farming puts little labor and capital into each hectare, usually across a large area, and gets a low output per hectare. Topic 5.1 named practices of each kind, such as market gardening (intensive) and ranching (extensive).

Intensity is measured per hectare. Take two hypothetical farms. A vegetable farm spends 60,000 dollars a year on workers, seed, fertilizer and machines across 20 hectares: 3,000 dollars per hectare. A cattle ranch spends 200,000 dollars across 10,000 hectares: 20 dollars per hectare. The ranch spends more in total, but the vegetable farm is far more intensive.

Intensity and purpose are separate questions. A subsistence family can farm a small rice plot intensively, by hand, and a commercial ranch is extensive. So describe a farm both ways: who the harvest is for, and how much goes into each hectare.

Quick check · Rank it

Rank four hypothetical farms from most intensive to least intensive, using each farm's yearly spending on labor, machines, seed and fertilizer. Work out each farm's spending per hectare before you rank.

Most intensive first

Give each one a place, 1 for first. Give two the same place if they are equal.

Farm A: 600,000 dollars across 1,500 hectares
Farm B: 90,000 dollars across 30 hectares
Farm C: 50,000 dollars across 5,000 hectares
Farm D: 240,000 dollars across 200 hectares

Your ranking: none yet

2d. Land costs and bid-rent theory

Why is one farm intensive and another extensive? Part of the answer is the cost of land. Bid-rent theory says that the amount a land user will pay for land, its bid rent, falls with distance from a market. Close to a city's market, many users compete for land and save on getting goods to buyers, so land is expensive. Farther away, land is cheap.

A farmer paying a high land rent has to earn a lot from each hectare to cover it, so near the market the land goes to intensive uses with a high value per hectare. A use that earns little per hectare can pay only a low rent, so it ends up on cheap land far away. The graph shows three hypothetical uses around one city.

A graph of bid rent, the most a farmer would pay each year to use a hectare, against distance from a hypothetical city's market, from 0 to 50 km. Market gardening bids 2,400 dollars at the market, and its bid falls by 150 dollars per km. Grain farming bids 900 dollars and falls by 30 dollars per km. Grazing bids 300 dollars and falls by 6 dollars per km. Market gardening bids highest out to 12.5 km, grain farming from 12.5 to 25 km, and grazing beyond 25 km. Land use shifts from intensive near the market to extensive far from it. — At each distance, the use with the highest bid gets the land.

At each distance, the use with the highest bid can pay the most, so it gets the land. One use takes over from another where their bids are equal: here, where the market gardening and grain lines cross at 12.5 km.

Land costs determine farming practices only in part. Climate, soil, water, technology and government policy also shape what a farm can grow and earn, so real farms do not always sit where bid-rent theory puts them.

Quick check · Calculate

Around a hypothetical city, market gardening can bid 1,800 dollars per hectare per year at the market, and its bid falls by 90 dollars for each kilometer away. Wheat farming can bid 600 dollars at the market, and its bid falls by 15 dollars per kilometer. Beyond what distance from the market does wheat farming outbid market gardening?

Your answer km

Common mistakes

The mistake	Why it is wrong	Do this instead
Calling a farm intensive because its total output or spending is large.	Intensity is about each hectare. A huge ranch can produce and spend a lot in total while using each hectare lightly.	Divide labor, capital or output by the area before you call a farm intensive or extensive.
Calling a whole region commercial, or subsistence, from a few of its farms.	A production region is defined by the extent of each practice, and most regions hold some farms of both kinds.	Ask what most of the region's farms do with most of their harvest.
Treating land cost as the only cause of intensive or extensive farming.	Bid-rent theory explains farming practices in part. Climate, soil, water, technology and policy also shape them.	Start with land cost and distance from the market, then look for a physical or political reason when a farm breaks the pattern.

Part 3 Watch it done Who gets the land 15 km out?

Open each step, then do the last one yourself.

Around hypothetical City V, three farming uses compete for land. Market gardening can bid 2,000 dollars per hectare per year at the market, and its bid falls by 120 dollars for each kilometer away. Dairy farming can bid 1,100 dollars, falling by 40 dollars per kilometer. Grazing can bid 250 dollars, falling by 5 dollars per kilometer. Which use gets a plot 10 km from the market, and which gets a plot 15 km away?

Predict first

Before the steps, which use do you expect to win the plot 15 km from the market?

Step 1 · Write each bid at a distance d
Market gardening: 2,000 − 120d. Dairy farming: 1,100 − 40d. Grazing: 250 − 5d. All are in dollars per hectare per year.
Step 2 · Work out the bids at 10 km
Market gardening: 2,000 − 1,200 = 800. Dairy farming: 1,100 − 400 = 700. Grazing: 250 − 50 = 200. Market gardening bids the most, so it gets the plot 10 km out.
Why this step?
Why does the plot go to the use with the highest bid?
A landowner rents to whoever pays the most. The highest bidder is the use that earns enough from each hectare at that distance to cover the highest rent, so the others are priced out.
Your step · Calculate

Finish it. Work out all three bids at 15 km from City V's market. How many dollars per hectare does the highest bidder offer there?

Your answer dollars per hectare

Part 4 Try it Farms in a changing country

Hypothetical Country T has several farming regions, from lowland grain plains to remote highland valleys.

Try it · Multiple choice

Commercial grain farms across Country T's Region S plant all of their land in a single crop. Which reason best explains this practice?

Try it · Multiple choice

The farm families of Country T's remote Region H grow a mix of grains, beans and vegetables and eat most of what they grow. A new paved road now links Region H to a port city with a large market for farm goods. Over the next twenty years, which change in Region H is most likely?

Part 5 Explain it Explain Country N's farming regions

Nothing you type leaves this page. Compare your answer with the model and each scoring point.

Free response is 50% of the exam score. This one is shaped like Question 3, from free-response II.

Free-response practice · Question 3 style

Stimulus 1, a hypothetical map of Country N, described in words: the north is dry hill country, where families grow millet and beans on small plots and keep a few goats, and most of what they grow feeds their own households. The south is a wide plain around the capital, City C, where large farms each plant all of their land in a single crop, such as soybeans, and sell it to exporters.

Stimulus 2, a hypothetical table of farmland around City C:

0 to 10 km from the city: land rent 2,000 dollars per hectare per year; mostly market gardens and dairy farms
10 to 50 km: land rent 400 dollars; soybean and corn farms
50 to 200 km: land rent 60 dollars; cattle ranches

(A) Identify the region of Country N where subsistence agriculture dominates.

(B) Describe one difference between subsistence and commercial agriculture shown in Stimulus 1.

(D) Using Stimulus 2, describe the relationship between distance from City C and land rent.

(E) Using bid-rent theory, explain why the land within 10 km of City C is farmed intensively.

(F) City C's suburbs spread 20 km outward over the next decade. Explain one likely effect on the farms 10 to 20 km from the city.

(G) Explain one limitation of bid-rent theory for explaining where intensive farming is found in Country N.

Your answer stays on this page. It is never sent or saved.

Model answer

(A) The northern hill country.

(B) The northern families grow mixed food crops mainly to feed their own households, while the southern farms grow a single crop mainly to sell to exporters.

(C) The southern farms grow for sale. Planting all of their land in one crop means they need only one set of machines and skills, and they can sell the crop in bulk to exporters.

(D) Land rent falls as distance from City C grows, from 2,000 dollars per hectare within 10 km to 60 dollars beyond 50 km.

(E) Bid-rent theory says users will pay the most for land near the market, where many compete for it. A farmer paying 2,000 dollars a hectare must earn a lot from each hectare to cover that rent, so only intensive uses with high output per hectare, such as market gardens and dairy farms, can afford the land.

(F) The suburbs bring new bidders, such as housing developers, so land rent 10 to 20 km out rises. Soybean and corn farms that cannot earn enough per hectare to pay it will switch to more intensive uses, such as market gardening, or sell their land for housing.

(G) Bid-rent theory explains farming practices only in part, by land cost and distance. It leaves out the physical environment: the north's dry climate limits what its farms can grow whatever its land costs, and an irrigated valley far from City C could support intensive farming that the theory would not predict.

Score your own answer. This is a self-check, not a grade. Tick each point your answer makes.

(A) and (B): identifies the northern hill country, and describes a difference such as growing mainly to feed the household against growing mainly to sell, or mixed crops against a single crop.
(C): explains one economic reason for monoculture tied to selling the crop, such as needing only one set of machines or selling in bulk.
(D) and (E): describes land rent falling with distance from City C, and explains that the high rent near the city is paid only by uses with a high output per hectare.
(F): explains that suburban growth brings new bidders and raises land rent, pushing farms toward more intensive use or out of farming.
(G): explains one force bid-rent theory leaves out, such as climate, soil, water or government policy, tied to where intensive farming is found in Country N.

Part 6 Check yourself Farms around City Q

The case questions use the table. The others mix ideas from the whole lesson.

Five hypothetical farms lie in the countryside around City Q, the only large market in the region. The land is flat and the climate is the same across the region, except around Farm E, which sits in a small district of sunny slopes with rich volcanic soil.

Farms around City Q (hypothetical); dollar figures are per hectare per year
Farm	Distance from City Q	Main product	Land rent	Spending on labor and capital	Value of output
A	4 km	Vegetables	1,400	5,000	8,000
B	15 km	Milk	600	1,800	3,000
C	40 km	Wheat	150	350	700
D	110 km	Beef cattle on open range	20	40	90
E	95 km	Wine grapes	900	4,500	9,000

Case question 1 · Calculate

After paying its land rent and its spending on labor and capital, how many dollars per hectare does Farm B have left from the value of its output each year?

Your answer dollars per hectare

Case question 2 · Decide and justify

Farm A's owner is offered a deal to turn its land into cattle grazing like Farm D's, with output worth about 90 dollars and spending of about 40 dollars per hectare each year. Would grazing pay on Farm A's land?

Which reason supports your answer?

Case question 3 · Multiple choice

Which statement best judges how well bid-rent theory explains the farms in the table?

The rest stand on their own and do not use the case.

Check yourself · Spot the error

A student classifies the farming of hypothetical Region R. Which line is the first to go wrong?

Check yourself · Put it in order

A cattle-grazing farm sits 30 km beyond the edge of a fast-growing hypothetical city. Put the changes bid-rent theory predicts in order, first to last.

Part 7 Keep it Bring back earlier ideas

This lesson stands on the farming practices of Topic 5.1 and the Green Revolution of Topic 5.5.

From 5.1 Introduction to Agriculture · Fill the statement

Name the farming practice each hypothetical farm shows.

On a 6-acre farm, a family grows tomatoes, peppers and herbs in greenhouses and trucks them to a nearby city's markets each morning: . On a 4,000-acre estate, hundreds of hired workers tend coffee trees, and the beans are dried and shipped abroad: . On a 300-acre farm, barley and clover are grown to fatten the farm's own sheep and cattle before they are sold: .

From 5.5 The Green Revolution · Sort it

Each card describes something on a farm in a hypothetical district during the Green Revolution. Tap a card, then the mark of the Green Revolution it shows.

High yielding seeds

Increased use of chemicals

Mechanized farming

In three lines

Production regions are defined by the extent of subsistence farming, for the household, or commercial farming, for sale, often as monoculture or monocropping.
Intensive farming puts much labor and capital into each hectare; extensive farming puts little into each of many hectares.
Bid-rent theory: land costs most near the market, so intensive uses take land close in and extensive uses take cheap land far out, with climate, soil and policy also playing a part.

Exam strategy for this topic

Section I, Multiple Choice: 60 questions in 60 minutes.
Section II, Free Response: 3 questions in 75 minutes.

When a question asks why a farm is intensive or extensive, start with land cost and distance from the market, then name a second force, such as climate or soil, if the farm breaks the pattern. When it asks about a region, say whether most of its harvest is eaten at home or sold.

Questions students ask

Is all commercial farming intensive?

No. Purpose and intensity are separate. A cattle ranch is commercial and extensive, a vegetable farm near a city is commercial and intensive, and a family's hand-worked rice plot can be subsistence and intensive.

What is the difference between monoculture and monocropping?

Monoculture is a single crop on the land at one time. Monocropping is the same crop on the same land year after year. Many books use the two words loosely, almost as one; both are practices of commercial farms.

How is bid-rent theory related to the von Thünen model?

Both explain farming patterns by distance from a market. Bid-rent theory, in this topic, compares what land users can pay at each distance. The von Thünen model, Topic 5.8, builds rings of farming around a market from the cost of moving goods to it.

Do subsistence farmers ever sell anything?

Yes. Many sell or trade a small surplus. What makes farming subsistence is that most of the harvest feeds the farm's own household.

Are the places in this lesson real?

No. Every country, region, city and farm here is hypothetical, with numbers chosen to show each idea clearly. Real farming regions fit these ideas more loosely.

Course alignment, for teachers

AP Human Geography topic 5.6, Unit 5: Agriculture and Rural Land-Use Patterns and Processes.

Skill 2.E: Explain the degree to which a geographic concept, process, model, or theory effectively explains geographic effects in different contexts and regions of the world.

This lesson maps all 2 essential knowledge statements of the topic to the part that teaches each one: 2 are checked by a scored question. The map is in the lesson file.