| 土壤退化 | soil degradation Soil may deteriorate either by physical movement of soil particles from a given site or by depletion of the water-soluble elements in the soil which contribute to the nourishment of crop, plants, grasses, trees, and other economically usable vegetation. The physical movement generally is referred to as erosion. Wind, water, glacial ice, animals and tools in use may be agents of erosion (由于土壤颗粒从某一个地点的移动，或土壤中的有助于作物、植物、草、树木、植被和其它经济实用作物的营养水溶性成分的耗竭，土壤可能会遭到破坏。这种物理运动一般被称为侵蚀，风、水、冰川、动物和使用的工具可能是侵蚀剂。) |
