Land degradation

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Across
  1. 2. shallow basins containing salt
  2. 4. crack in the Earth's crust
  3. 5. an excess of salt in soil or water
  4. 6. a level below which the earth is saturated
  5. 9. clearing of large areas of land
  6. 10. land suitable for growing crops
  7. 12. underground water between nonporous rocks
  8. 15. whose deep roots can reduce salinity
  9. 16. rich soil formed from breakdown of organic matter
  10. 17. large variety of fauna and flora
  11. 18. the environment with its living organisms
  12. 19. unsustainable loss of ground cover caused by this land management practice
  13. 22. whose basin is most affected by salinity
  14. 23. flowing water concentrates in shallow channels
  15. 24. layers of of soil that contain most of the nutrients
  16. 25. the natural slope or shape of the land
Down
  1. 1. salt permanently encrusts surface of the land
  2. 3. something that can be kept going
  3. 4. land left unploughed for a season or longer
  4. 7. a resource of value
  5. 8. replanting areas cleared of trees
  6. 11. area of land covered by water for some time at least
  7. 13. an area of land drained by a river
  8. 14. river mammal critically endangered by 3 Gorges Dam
  9. 20. whose burrows can cause tunnel erosion
  10. 21. crop management that can cause watertable to rise