Institute of Water Resources Research;
Xi'an University of Technology;
Xi'an 710048 (China);
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau;
Institute of Soil and Water Conservation;
Chinese Academy of Sciences and Ministry of Water Resources;
Yangling 712100 (China);
Department of Agronomy;
Iowa State University;
Ames;
IA 50011 (USA);