Question

commercial rearing of earthworm is called​

Answer 1

This process is called vermicomposting, while the rearing of worms for this purpose is called vermiculture. Vermicast (also called worm castings, worm humus, worm manure, or worm faeces) is the end-product of the breakdown of organic matter by earthworms. ... Vermicomposting can also be applied for treatment of sewage.

$\large\mathcal{\blue{@MSLIONESS♡}}$