Land and water use

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Across
  1. 3. Shortage of food
  2. 7. the cultivation of aquatic plants for food
  3. 10. genetically modified organism.
  4. 12. Saturation of soil
  5. 14. Food produced per unit of land
  6. 15. Cultivation of a single crop
  7. 16. Growing two or more crops in proximity
  8. 19. PH greater than 7
  9. 22. removal of trees and wildlife.
  10. 23. dead plants and trees
  11. 24. Growing multiple crops at the same time.
Down
  1. 1. outermost layer of soil
  2. 2. When topsoil fall by 10%
  3. 4. works to conserve land.
  4. 5. urban areas spreading into rural area
  5. 6. allows water to flow underground
  6. 8. Fertile soil of clay and sand
  7. 9. Overuse of pesticides
  8. 11. damaging grassland
  9. 13. Removing all trees in the area
  10. 17. excess water
  11. 18. burn, A controlled fire
  12. 20. Land preserved by federal government
  13. 21. loss of water of and plant nutrients from soil