Soil erosion is the removal of topsoil from the land surface by water or wind. The loss of soil can reduce crop production and damage drainage networks. It can also cause problems off-site through sedimentation of waterways. The main types of water-induced soil erosion are splash erosion, sheet erosion, rill erosion, and gully erosion. Wind erosion involves deflation and abrasion, moving particles by surface creep, saltation, and suspension. Factors like precipitation, soil properties, vegetation cover, slope angle, and human activities influence erosion rates. Methods to control erosion include maintaining vegetative cover, using windbreaks and contour plowing, and preventing deforestation and overgrazing.