Wenzhao Liu1, Qingwu Xue2, Wenzhao Liu1, Tinghui Dang3 and Changqing Gao4, (1)State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi, CHINA, (2)Texas A&M AgriLife Research, Amarillo, TX, US, (3)State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, China, (4)Changwu Centre of Agricultural Technology Extension, Changwu, Shaanxi, China