Topsoil, also known as the A-horizon, is the most fertile and biologically active layer of the soil. That is the layer where farmers plant seeds, and it supports the crops that feed the world.
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A soil profile shows typical soil layers or horizons that may or may not be present in all soils.
Topsoil blowing a mile east of Langdon along North Dakota State Highway 5.
A roadside ditch is full of topsoil from the adjoining field that was tilled in the fall.
View soil analysis results of the zero- to six-inch deep lost topsoil for key soil properties and levels.
The dollar amounts are listed for replacing direct nutrient loss and by losing soil organic matter for zero- to six-inch soil depth and for every inch of topsoil.
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