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STD 12 - 12. ecosystem — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 12. ecosystem1 Mark
MCQ
Humus is important for plant growth because
  • A
    It is partially decomposed
  • B
    It is derived from leaves
  • ✓
    It is rich in nutrients and increases the water holding capacity of soil
  • D
    It is made up of dead organic matter
✓

Answer

Correct option: C.
It is rich in nutrients and increases the water holding capacity of soil
c
(c)Humus is total organic matter in the soils. It is rich is $NPK$. The humus is formed from decay and decomposition of dead plant and animal matter. The humus soil is the best soil as it has got high water holding capacity, high porocity, aeration and high organic content.

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