Soil:A Vital Natural Resource.

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Across
  1. 3. Main ingredient in soil,weathered/eroded rock
  2. 4. Found in areas with hot/wet climatic conditions in tropical/equatorial zones.
  3. 7. This provides HUMUS giving soil its fertility.
  4. 8. This makes up about 25% of soil.
  5. 9. Contains oxygen/nitrogen vital for plants to grow,
  6. 11. A dark jellylike substance binding soil together.
  7. 12. Soil layer containing organic matter like leaves and decomposing vegetable matter.
  8. 14. Stones,sand,silt and clay providing minerals.
  9. 17. Earthworms,bacteria,fungi,insects,burrowing animals.
  10. 18. Subsoil, lighter in colour,stoney,closer to bedrock.
  11. 20. Water passing through soil taking minerals from A horizon down into B horizon.
  12. 21. Upper topsoil layer,has a high humus content,darker.
Down
  1. 1. Grey ,sticky and waterlogged.
  2. 2. Type of bedrock broken down by weatherting to form soil.
  3. 5. Found on the floors of coniferous forests in cold and wet areas.
  4. 6. Dark in colour,develop in cold,upland areas and lowland areas with poor drainage.
  5. 10. What it is made up of.
  6. 13. Bedrock or parent material,lower layer solid rock,upper layer rock particles.
  7. 15. A type of weathering causing breakdown of bedrock.
  8. 16. Most common soil types in ireland.
  9. 19. A thin layer of material on the earth's surface in which plants have their roots.