Question

One direct use of earthwarms to farmers is [MP PMT 1986]
A) Allowing sunlight to pass in upper layers of soil
B) Enrichment of soil by nephridial excretions
C) Removal of dead leaves
D) Killing of some harmful insects

Answer 1

Ur answers is option B

Explanation-
Nephridial excreation by earthworm make the soil rich with amount of nitrogen which is mostly not available in soil,these make soil fertile for growth of plants

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Answer 2

hiii,

the answer is option B

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