The O-Horizon
humus
Humus
Subsoil.
bed rock
topsoil.
HUMUS . . . cures urvythang.
Soil is made up of a thin layer of weathered rock, humus, air, and water.
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.
topsoil
topsoil
The first layer is Litter, the third is Humus, so the second layer would be Duff.
Humus