Geography 313

  1. What three states compose soil
    Solid, liquid and ORGANIC
  2. Define humus
    Humus - term used to descrive partially decomposed organic matter
  3. Define Pores in soils
    Pores - Spaces between soil particles
  4. What is contained within soil pores
    WATER and AIR
  5. What can water contain
    WAter can contain NUTRIETNS
  6. What is reposnsible for the transport of material through soils
    WATER is responsible for the transport of materials through soils
  7. Regolith he mentioned it
    Old parent material thats on its way to becomign soil
  8. What soil layer is known as the zone of accumulation of organic debris
    LFH layer
  9. Define the A horizon
    A horizon - the mixing layer of mineral and organic matter in soil
  10. what is known as the zone of primary biological activity?
    The A horizon is known as the zone of primary biological activity
  11. Define B horizon
    B horizon - Zone of accumulation of mineral soil and organic material leached from upper horizon
  12. Define C horizon
    C horizon the weatherd parent material
  13. What generally termed layers are there to the cross section of a forest?
    • Vegetation
    • Leaf Litter
    • Soil
    • Regolith
    • Bedrock
  14. How do horizons develop
    Horizons develop by the removal or accumulation of ions, colloids or chemical compounds
  15. What is the word for "true soil"
  16. What horizons are considerd to tbe the solum
    The A and B horizon
  17. Define Leaching
    Leaching - Seeping water movng soil materials deeper into the ground
  18. Define eluviation
    Eluviation - the downward movement of fine soil particles from the upper horizons (clay and collids)
  19. Define soil collids
    Soil colloids conists of particles smaller than one hundred thousandth of a millimeter (0.000,01 mm)
  20. What can Soil Colloids be made up of?
    Soil colloids cna be both mineral and organic substances
  21. What are mineral colloids usually derived from
    Mineral Colloids are usually from clay minerals
  22. Are organic colloids usually long lasting?
    Organic colloids are usually resistant to decay
  23. What do clay colloids usually attract therefore what charge are they
    Soil colloids are negativly charged and attract positivly charged nutrients
  24. Name four nutrients that soil colloids are responsible for transfering to plants
    • Ca
    • K
    • Na
    • Mg
  25. What is ment by peds
    Peds the way the soil is grouped together
  26. Name the 4 types of peds he lists
    • Small
    • Granular
    • Large
    • Angular blocky
  27. What holds peds together
    Soil colloids
  28. What are primary minerals
    Compounds present in unaltered rock
  29. What are secondary minerals
    Weather primary minerals
  30. Give an example of secondary minerals
  31. Jst saying Soil mositure time
  32. Define evapotransperation
    Evapotransperation - the combined water loss to the atmosphere by evaportaion and from soil transperation from plants
  33. Define Ground water recharge
    Ground water recharge - Water flowing directly through the soil to aquifers and streams below soil horizons
Card Set
Geography 313
Soil characteristics and classification