SOIL POLLUTION

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Across
  1. 4. The breakdown of rock by acidic water to produce clay and soluble salt
  2. 6. reduction to ashes
  3. 7. also known as C horizon
  4. 8. Action results from the alternating freezing and thawing of water.
  5. 10. Chalk soil has highly.....due to the calcium carbonate within its structure
Down
  1. 1. Help plants to give an additional boost of nutrients.
  2. 2. The dominant processes in a B horizon
  3. 3. major component of soil.
  4. 5. A light and moisture retentive soil type
  5. 9. The types of acid produced by lichens