A) it is rich in nutrients and increases the water holding capacity of soil
B) it increases aeration of soil
C) it increases porocity of soil
D) all of the above
Correct Answer: D
Solution :
Death of plants and animals result in the addition of organic substance to the soil. Humus is dark coloured, amorphous completely decomposed organic matter produced as a result of microbial action. All the options in the given question are correct.
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