Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, affiliation not provided to SSRN, affiliation not provided to SSRN and Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau

affiliation not provided to SSRN, Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, affiliation not provided to SSRN, affiliation not provided to SSRN, Ningxia University, affiliation not provided to SSRN, affiliation not provided to SSRN, Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agricultural and Forestry University - State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, affiliation not provided to SSRN and affiliation not provided to SSRN