Yimeng mountain area is the typical rocky mountain areas of northern China.The local soil with loose texture and easy to lost was developed from the gneiss and sandstone.Currently,there is lack of the long-term observation data of soil erosion.A small watershed in Yimeng mountain area of Shandong Province was chose to make a preliminary estimate about soil erosion rates of natural soils and cultivated soils on sloping land using the 137Cs tracer method and soil erosion model of Yang.The erosion rate of cult...