Soils

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Across
  1. 3. There are 5 soil forming ____________
  2. 5. A very small soil particle with an electrically charged surface
  3. 7. The exit of soil material downwards from a higher soil horizon
  4. 9. The type of soil water helt too tightly to the soil particles for plants to access
  5. 11. The type of soil water which flows freely through macropores due to gravity
  6. 12. The colour of soil indicating the oxidation of iron
  7. 13. The soil structure which looks like think plates
  8. 14. Nitrogen fixing fungi that live on plant roots
  9. 18. The washing down of dissolved ions through soil horizons
  10. 20. The most fertile horizon
  11. 21. The overall charge of a colloid
  12. 23. The ratio of the volume of voids to the total soil volume
  13. 24. Physically decayed organic matter
  14. 26. Unconsolidated mineral matter on the land surface
Down
  1. 1. Physical property of soil describing the amount of sand, silt & clay
  2. 2. The study of soil
  3. 4. The type of soil water which is availiable for plants
  4. 6. A positively charged ion
  5. 8. Most influential soil component
  6. 10. The incomming of soil material from a higher horizon to a lower horizon
  7. 15. The ability of soil colloids to exhange cations between its surface and the soil solution
  8. 16. The topmost horizon
  9. 17. The name for the soil's layers
  10. 19. The term for poorly drained soils with a blue/grey colour
  11. 22. Particles which are larger than 2mm and are not considered part of the soil
  12. 25. The soil texture which is in the middle of the soil texture triangle