Question

Why humus, top soil and sub soil are considered as most important layers of soil?​

Answer 1

Answer:

The topsoil layer is a mixture of sand, silt, clay and broken down organic matter, called humus. Humus is rich, highly decomposed organic matter mostly made from dead plants, crunched-up leaves, dead insects and twigs.

hope it will help u

if it is helpful to u then plz mark as brilliant