UNIT 1: The importance of soil.

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Across
  1. 1. Organic Matter
  2. 3. cover 75% of Earth
  3. 4. soils that are difficult to till
  4. 5. Changes all the time
  5. 8. physical and chemical changes
Down
  1. 1. distinct layers int he soil
  2. 2. Living, naturally occurring dynamic system
  3. 6. clay soils make basements and highways do this
  4. 7. tillage or physical condition of the soil