Humus is formed in

Horizon - A

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Horizon - O

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Horizon - B

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Both A and B

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Solution

The correct option is B Both A and B
Decomposers mainly act upon the dead and decaying matter present in the soil and convert it into the humus or compost. It increases the fertility of the soil. It is mainly formed in the horizon - A and O because these two layers of the soil has the maximum bacterial activity.
So, the correct answer is option D.

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Similar questions

Match the following and choose the correct option:

\begin{matrix} i . A - horizon & a . Small lumps of rocks i i . B - horizon & b . Partially decomposed organic matter i i i . C - horizon & c . Rich in humus, living creatures, and inorganic minerals i v . O-horizon & d . Less humus and more minerals, compact \end{matrix}

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