Question

why earth warms consider as farmers friend

Answer 1

Hey!!!

Earthworm are called friends of farmer because  :

Earthworm moves through the soil that loosens and aerates the soil. This also helps the water to reach the roots quickly.

Earthworm 's excreta increases the fertility of the soil. 

After their death, they get decomposed and add humus to the soil.

Hope it helps to you.
Thanx

@Riya

Answer 2

Because earth worm also helps farmers in so much of different ways.