soil, the land and erosion

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Across
  1. 1. The productive potential of the soil.
  2. 3. Planting trees next to low growing crops to prevent erosion.
  3. 4. Rill, gully and sheet erosion are all caused by which force of nature?
  4. 8. Law enacted in 1977 to restore the land after strip mining.
  5. 11. Water erosion where the top layer of soil slides off a hill.
  6. 15. Cattle exceeding their carrying capacity of the land cause soil erosion by __?
  7. 16. Soil horizon necessary for plant growth.
  8. 18. Process of transporting soil via wind or water from one place to another.
  9. 19. The two types of water erosion are splash and ___.
  10. 20. The incline/angle of a hill.
  11. 21. The element necessary to be considered organic.
  12. 22. Causes soil to be dark brown to black.
  13. 24. Prairies are also known as a ___.
  14. 25. Trees planted to protect barns, houses, etc.
  15. 26. Deposit of silt left by wind.
  16. 27. Created the dust bowl of the 1930's.
Down
  1. 2. Caused by man's activities on earth.
  2. 3. Process by which soil is made.
  3. 5. Adding water to dry land regions.
  4. 6. Made from grass, rock or concrete to divert water to reduce erosion
  5. 7. Any soft stemmed low growing green plants.
  6. 9. Soil horizon containing recognizable material such as twigs and leaves.
  7. 10. Chemical substances necessary for plant growth in soil.
  8. 12. Particle size most susceptible to erosion?
  9. 13. Plowing across a slope to decrease soil erosion by water.
  10. 14. Planted to increase soil nutrients and decrease soil erosion.
  11. 16. Cutting steps into a hill to decrease soil runoff erosion.
  12. 17. Made from parent material.
  13. 23. The different layers in a soil profile.