Agriculture, oil. A country's economy is based on two sectors, agriculture, and oil. Production of a dollar's worth of agriculture requires an input of $\$ 0.40$ from agriculture and $\$ 0.35$ from oil. Production of a dollar's worth of oil requires an input of $\$ 0.20$ from agriculture and $\$ 0.05$ from oil. Find the output from each sector that is needed to satisfy a final demand of $\$ 40$ million for agriculture and $\$ 250$ million for oil.

What was systematic agriculture?

Which biomes are best suited for agriculture? Explain why each of the biomes you did not specify is less suitable for agriculture.

Reread the text following the heading "Advances in Agriculture." Explain how changes in agriculture affected workers in the nineteenth century.

Evaluating

Write a myth that reflects the changes that the development of agriculture brought to the earliest Americans.

Consider:

• Iife before the development of agriculture

• life after the development of agriculture

(a) Describe the process of slashand-burn agriculture.

(b) What might be some dangers of the extensive use of slash-and-burn agriculture?

Which of the following statements about no-till agriculture is NOT true? (a) No-till agriculture reduces wind and water erosion. (b) No-till soil undergoes less oxidation. (c) Organic farms are less likely to use no-till agriculture. (d) No-till agriculture increases crop production relative to conventional tilling methods. (e) No-till agriculture releases less $\mathrm{CO}_{2}$ than conventional tilling methods.

What is the key concept for this section? What three systems supply most of the world's food? Define irrigation. Define and distinguish among industrialized agriculture (high-input agriculture), plantation agriculture, traditional subsistence agriculture, and traditional intensive agriculture. Define polyculture and summarize its benefits. Define organic agriculture and compare its main components with those of conventional industrialized agriculture. What is a green revolution? Summarize the story of industrialized food production in the United States.

What is agriculture?____________________________________________________________________________________________________________________

The largest source of anthropogenic greenhouse gases in the United States is ________, followed by ________.

A. electricity generation; agriculture

B. agriculture; transportation

C. electricity generation; industry

D. agriculture; electricity generation

E. electricity generation; transportation

Why is agriculture in grasslands more productive than agriculture in rainforests?

Why do you think market-oriented agriculture is more productive than subsistence agriculture?

What are three differences between industrialized agriculture and subsistence agriculture?

Write an essay identifying the factors affecting the location of subsistence agriculture and commercial agriculture in East Africa.