| Based on the analysis of models abroad,a model of soil erosion was set up to assess the impacts of conservation tillage practices in dry land areas of Northern China.Supplied with local soil and crop parameters and climate data,the model could simulate soil loss on hour basis to evaluate different conservation tillage system.According to the characteristics of conservation tillage,the effect of residual cover on soil water content and roughness was considered.The preliminary results of calibration and validation showed that the model could be used to simulate soil loss caused by wind erosion with high accuracy. |