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Q.

Which of the following is not one of the reasons why earthworms are known as “friends of farmers”?

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a

They convert organic debris into worm castings that increase fertility of the soil.

b

They make the soil porous which helps in respiration and penetration of the developing plant roots

c

They are involved in a process called vermicomposting which increases fertility of soil

d

They help in biological control of pests

answer is D.

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Detailed Solution

Earthworms do not help in biological control of pests. Earthworms are known as "friends of farmers" because they make burrows in the soil and make it porous which helps in respiration and penetration of the developing plant roots. The process of increasing fertility of soil by the earthworms is called vermicomposting.

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Which of the following is not one of the reasons why earthworms are known as “friends of farmers”?