In which of the following humus is present in the reasonable amount?
A
A - Horizon
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B
B - Horizon
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C
C - Horizon
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D
Bed rock
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Solution
The correct option is A A - Horizon A horizon is the topmost layer of soil. It contains a lot of organic substances and humus in it. So, it is suitable for the growth of plants as roots extend to this layer and obtain nutrition from them.