BiologyWhy is the organic matter (humus) an important part of soil ?       

Why is the organic matter (humus) an important part of soil ?       

  1. A

    It helps to improve water infiltration.  

  2. B

    It can breakdown organic pollutants.

  3. C

    It converts nitrogen in the air into nitrates used by plants.

  4. D

    It is rich in nutrients, which is important for fertility. 

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