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Black soil has the maximum content and is extremely fertile.
Humus is located in the top layer of soil. It is a type of organic soil matter and aids in nutrition retention in the soil.
the two layers are sub soil The layer of soil that has little or no humus in it is the subsoil. The top layer of the soil has the most humus in it because the dead leaves fall from the plant and go back into the soil.
Humus on the top layer
all i know the three types of soil are top soil sub soil and bedrock
humus
Top soil usually has humus and minerals which are often absent from sand, clay or gravel.
It is called humus.
Because it has Humus which is a organic material that is from living things.
how does the presence of humus affect soil
humus is a source of nutrients which makes soil fertile.
Sub soil has a lighter color than top soil. It is more compact denser than top soil with a sticky texture. Subsoil does not have humus or organic matter like top soil.