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its called topsoil.
Topsoil.
The top layer of soil where grass grows is called Humus. The next layer is the topsoil, and the layer after that is the subsoil.
Another name for black topsoil is the O. layer. In the science of soild the top layer is known as the O. layer which stands for Organic.
Topsoil.
Topsoil.
topsoil is the top layer. its a mixture of small rock pieces, humus, and other organic material. most living things are in the topsoil. rain sinks into the topsoil. it carries minerals to the subsoil (2nd layer)
The upper layer- topsoil.
It is called 'topsoil'
The A horizon.
subsoil
subsoil