Lillian Finkle Origin and Composition of Soil

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Across
  1. 3. smallest size particles.
  2. 7. biome with deep O horizons due to leaf litter.
  3. 10. smallest particle size.
  4. 11. topsoil. Organic matter mixed with weathered rock particles.
  5. 14. loosens and mixes soil, increasing water percolation and mixing O-horizons due to leaf litter.
  6. 15. caused wheat prices to fall to record low levels.
  7. 17. molecular nature of rock is changed due to reactions with water, oxygen, etc.
  8. 19. biome with very shallow O and A horizons due to their low productivity.
  9. 20. intermediate size particles.
Down
  1. 1. the slow movement and filtering of a liquid through a porous material.
  2. 2. subsoil. Tiny rock particles that leach down from topsoil.
  3. 4. solid rock underlying loose deposits such as soil or alluvium.
  4. 5. the physical breakdown of rock by wind, water, and heat.
  5. 6. biome with very shallow horizons due to their low productivity.
  6. 8. parent material that has undergone little weathering because it is so deep underground.
  7. 9. biome with acidic soils due to the needles they drop.
  8. 12. bedrock. Unweathered,solid rock.
  9. 13. massive drought that began in the winter of 1931-1932 and persisted for up to 7 years.
  10. 16. humus. Non-decomposed plant matter.
  11. 18. partially decomposed plant and animal matter.