Human Impact - Food and Agriculture (Unit 9)

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Across
  1. 2. a measure of the quantity of food produced on a given area of land with limited inputs of energy and resources
  2. 9. the surface layer of soil, which is usually richer in organic matter than the subsoil is
  3. 10. the food that some animals regurgitate from the first chamber of their stomachs and chew again to aid digestion
  4. 12. the process by which land in arid or semiarid areas becomes more desertlike because of human activity or climatic changes
  5. 13. a prolonged period during which rainfall is below average
  6. 15. the type and amount of food that a person eats
  7. 16. Such as manure, are used to enrich the soil so that plants grow strong and healthy.
  8. 20. Catching or removing from a population more organisms than the population can replace
  9. 21. increases in crop yields resulted from the use of new crop varieties and the application of modern agricultural techniques
  10. 23. the raising of aquatic organisms for human use or consumption.
  11. 24. the amount of food that can be produced in a given area
  12. 25. cud-chewing mammals that have three- or fourchambered stomachs
  13. 26. the technology in which genetic material in a living cell is modified for medical or industrial use
  14. 27. when crop land is allowed to remain unplanted after few years of use.
  15. 30. chemicals used to kill insects, weeds, and other crop pests
Down
  1. 1. use of living organisms to control pests.
  2. 3. when the minerals in the rock react chemically with substances such as water to form new materials
  3. 4. partly decomposed organic material
  4. 5. happens when the minerals in the rock react chemically with substances
  5. 6. a condition that occurs when people do not consume enough Calories or do not eat a sufficient variety of foods to fulfill all of the body’s needs.
  6. 7. widespread starvation caused by a shortage of food
  7. 8. PLOWING This method includes plowing across the slope of a hill instead of up and down the slope.
  8. 11. happens when human activity or natural processes damage the land so that it can no longer support the local ecosystem.
  9. 14. ____________ grow only enough food for local use
  10. 17. animals that are managed and bred for human use
  11. 18. wearing away of rock or soil by wind and water
  12. 19. land that can be used to grow crops
  13. 22. a crop is harvested without turning over the soil
  14. 26. without turning over the soil
  15. 28. accumulation of salts in the soil
  16. 29. Domesticated animals that are raised to be used on a farm or ranch or to be sold for profit