土壤侵蚀
soil erosion
soil erossion
l soil erosion
soil erosion effects
soil erosion effect
land erosion
soil erision
soil eroion
soil denudation
soil loss
soil control
soil loss amount
universal soil loss equation
soil and water conservation
Erosion
geologic-ecological investigation
arable slope lands
principal component analysis
anti-erodibility
土壤侵蚀分类
classification of soil erosion
土壤侵蚀信息系统
Soil erosion information system