Question

organic wastes and earthworms are added to soil why

Answer 1

organic waste and earthworms are added to soil because -
- they increase the fertility of the soil.
- they increase the nutrition content of the soil.
- earthworms provide proper aeration to the soil.
- earthworms also increase the fertility of the soil.
thanks... 

Answer 2

because they are produces humus and earthworm loses the soil and bacteria survive easily. then,soil will make more fertile and formed fast