Transportation of surface soil by various natural forces is called soil erosion.
Soil erosion is defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient-rich materials. Therefore, this is the layer that farmers want to protect for growing their crops and ranchers want to protect for growing grasses for their cattle to graze on.
the different types of soil erosion:Gravity 
                                                     Surface Water 
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