Chapter 10-Ethan

3. agriculture undertaken primarily to generate products for sale off the farm
8. the area surrounding a city from which milk is supplied
11. a form of subsistence agriculture in which people shift activity from one field to another
14. a patch of land cleared for planting through slashing and burning
17. farming methods that preserve long-term productivity of land and minimize pollution
19. degradation of land, especially semiarid areas primarily because of human actions such as excessive crop planting
20. a form of subsistence agriculture based on herding domesticated animals

1. harvesting twice a year from the same field
2. the time when human beings first domesticated plants and animals.
4. the practice of rotating use of different fields from crop to crop each year to avoid exhausting the soil
5. Agriculture designed primarily to provide food for direct consumption by the farmer and his family
6. the seasonal migration of livestock between mountains and lowland pastures
7. the growing of fruits, vegetables, and flowers
9. a form of subsistence agriculture in which farmers must expend a relatively large amount of effort to produce the maximum feasible yield from a parcel of land
10. Commercial agriculture characterized by the integration of different steps in the food-processing industry
12. areas with little or no access to healthy and affordable food
13. a large farm in tropical and subtropical climates
14. a flooded field for growing rice
15. a series of agricultural revolutions that increased the planets capacity for supporting human life.
16. commercial gardening and fruit farming
18. a system of planting crops on ridge tops