Question

'Worms, insects and microbes increase soil fertility'. How?​

Answer 1

Answer:

Increase organic matter

Earthworms feed on soil and dead or decaying plant remains, including straw, leaf litter and dead roots. They are the principal agents in mixing dead surface litter with the soil, making the litter more accessible to decomposition by soil microorganisms.

Answer 2

Answer:

Worms and insects dig the soil and provide aeration to the soil. Microbes break down the organic substances present in the soil producing mineral salts which are useful to the plant. In this way worms, insects and microbes increase soil fertility.