soil basics

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1. soil can be used as a sink because..

  • it allows slow decomposition of soil carbon if it is not disturbed, this is through fauna respiring it and converting the rest into modified soil carbon - keeping the carbon from the atmosphere for a longer time. some carbon can be further decomopsed
  • it is ploughed so can move the carbon through the soil
  • it is able to conver the soil into inert carbon which is easily and quickly put back into the atmosphere
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2. how does soil get its nutrients

  • from water
  • from parent rock, the atmosphere and decomposers
  • from animals

3. which farming practices do not help with the potential for a soil to act as a carbon sink

  • allowing grazing on the soil
  • using pesticides and fertilizing the soil
  • Tilling and Ploughing
  • driving heavy machinery on the soil

4. where does the soil store its nutrients

  • from air
  • from available water
  • from roots
  • from pores

5. soil...

  • dirties soil
  • filters and purifies water
  • acidifies water
  • recycles water

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