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Question

Why good humus in the soil, prevent it from wind erosion?


Solution

Wind erosion is when the wind lifts and removes topsoil. In dry areas in particular, soil that is not kept in place by plants is easily removed by the wind. It usually takes place in dry soil, where the humus content is very low.
Higher humus contents keep the particles closer together, so that wind can only induce erosion at very high wind speeds. Soils with higher humus contents, retain rainwater better than soils with little humus. A soil surface that does not immediately run dry after rainfall is much better able to defy wind erosion. Soil with higher humus content is able to retain more water, which keeps the soil together by adhesive forces like a glue, so the wind cannot remove the soil easily

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