Science glossary film: Topsoil

Topsoil

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The uppermost 5 to 20cm of soil, with a high concentration of organic matter and microorganisms, where almost all of the biological activity in soil takes place.

The uppermost 5 to 20cm of soil, with a high concentration of organic matter and microorganisms, where almost all of the biological activity in soil takes place. Its erosion is a major concern in some agricultural areas, as topsoil takes a very long time to build up again, when it is blown or washed away.

Its erosion is a major concern in some agricultural areas, as topsoil takes a very long time to build up again, when it is blown or washed away.

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