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.
The first layer is Litter, the third is Humus, so the second layer would be Duff.
Humus
The first layer is Litter, the third is Humus, so the second layer would be Duff.
bed rock
topsoil.
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 A horizion
topsoil
topsoil
HUMUS . . . cures urvythang.
Humus