Deep black soil is considered to be highly productive due to high proportion of

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11.Organisms and Populations

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Deep black soil is considered to be highly productive due to high proportion of

A

Silt and earthworm

B

Clay and humus

C

Gravel and $Ca^{++}$

D

Sand and $ Zn$

(AIPMT-1991)

Solution

(b)Black soil predominantly with clay and humus. This soil is very fertile because most of minerals are present in it.

Standard 12

Biology

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