Abstract:Land use Change is the results of interactions between physical factors and human activities.Land ues change may influence many natural phenomena and ecological processes,including soil nutrient and soil water change,runoff and soil erosion,biodiversity and biogeochemical cycle.Land use changes can results in land degradation,such as water and soil loss,land desertification.It also can control water and soil loss,land desertification,and improve soil quality.Since late 1970s,the new land policy “Household R...