1. College of Agronomy/Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China
2. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi, China
3. Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
4. Department of Agriculture, University of Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan