Sheet erosion is a type of soil erosion that occurs when thin layers of soil are removed from a large area by the action of water, usually during rainfall. This process happens gradually, as water flows over the surface, carrying away small particles of soil. It often affects agricultural land, reducing soil fertility and impacting crop yields. The main causes of sheet erosion include heavy rainfall, improper land management, and lack of vegetation cover. Vegetation helps to anchor the soil in place, while land management practices like contour plowing can help reduce the risk of erosion.