Deep black soil is considered to be highly productive due to high proportion of
Deep black soil is considered to be highly productive due to high proportion of
- [AIPMT 1991]
- A
Silt and earthworm
- B
Clay and humus
- C
Gravel and $Ca^{++}$
- D
Sand and $ Zn$
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- [AIPMT 2009]
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The organism which are present in tropical regions called
The organism which are present in tropical regions called