Movement of soil particles from one place to another by wind and water is a natural phenomenon. 运动的土壤颗粒从一个地方到另一个地方的风和水是一种自然现象。
The runoff sediment has higher clay content than the surface soil, andthe splash soil has higher fine sand content. 通过对侵蚀上壤的颗粒组成分析表明，侵蚀对土壤颗粒具有选择性，径流侵蚀泥沙中粘粒含量比侵蚀表土含量高，溅蚀泥沙中细沙粒含量变高。
