9th Class Science Natural resources Question Bank 9th CBSE Science Natural resources

  • question_answer
      Define humus and state its function in the soil.

    Answer:

       A dark coloured organic substance consisting partially or wholly decayed plant or animal waste that provides nutrient for plants and increase the ability of soil to retain water, is called humus.                    Humus plays a major role in deciding the soil structure because it causes soil to become more porous. 


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