Question

1. define top soil ?
2. define sub soil ?​

Answer 1

Explanation:

the top layer of soil.

plough (land) so as to cut into the subsoil.

Answer 2

Topsoil : This is the top most layer of the soil. It is dark in colour and also contains the humus .

Subsoil : It lies below the topsoil . It is the light coloured layer . it is full of broken pieces of rocks .