Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 9 PCB MCQ (Single Correct)

Which of the following is correct about humus?

A
It is a completely decomposed, dark-coloured, amorphous substance.
B
It forms as a result of mineralisation.
C
It is colloidal in nature and serves as a reservoir of nutrients.
D
It is decomposed at a faster rate due to its high organic matter content.

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The correct answer is:
C

Humification leads to accumulation of a dark coloured amorphous substance called humus that is highly resistant to microbial action and undergoes decomposition at an extremely slow rate. Being colloidal in nature it serves as a reservoir of nutrients. The humus is further degraded by some microbes and release of inorganic nutrients occurs by the process known as mineralisation.

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