Question

____ are referred to as farmer's best friends.

Answer 1

Earthworms are farmer's best friends because -
1. Burrowing action of earthworms improves soil aeration and also enhances plant root penetration.
2. Earthworms feed on decaying material in the soil. After digestion the excreta of earthworm is added to the soil. These are rich in nutrients which enhances the fertility of soil.