Vallie - Plant Agriculture

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Across
  1. 3. A period in the 1930s of severe dust storms that devastated the Southern Plains region of the U.S.
  2. 5. Intermediate size particles
  3. 6. Ideal for farming: moderate water retention and percolation rate
  4. 8. Humus : non-decomposed plant matter
  5. 10. Parent Material : rock that has undergone little weathering because it is so deep underground
  6. 12. In 1929 the sock market crashed - wheat prices began to plummet
  7. 13. Subsoil : tiny rock particles that leach down from the topsoil
  8. 14. When the water runs through the soil
  9. 16. Deepest topsoil, best for farming
  10. 17. Shallow O & A horizons due to rapid plant grown and leaching
  11. 18. Acidic soils due to the needles the trees drop
  12. 19. Molecular nature of rock is changed due to reactions with water, oxygen
Down
  1. 1. Deep O-horizons & deep roots
  2. 2. Topsoil : organic matter mixed with weathered rock particles
  3. 4. Loosens and mixes soil, increasing water precolation and mixing O-horizon Humus into the topsoil
  4. 7. Bedrock : unweathered solid rock
  5. 9. Largest parucke size
  6. 11. Physical breakdown of rock by wind, water, cold, and heat
  7. 15. Shallow A horizons due to low productivity
  8. 18. Smallest particle