1. College of Agronomy, Key Laboratory of Crop Physi‐ecology and Tillage Science in Northwestern Loess PlateauNorthwest A&F University Yangling PR China
2. College of Life SciencesYan'an University Yan'an PR China
3. Institute of Soil and Water ConservationNorthwest A&F University Yangling PR China
4. Integrated Water and Land ManagementInternational Center for Agricultural Research in the Dry Areas (ICARDA) Rabat Morocco
5. State Key Laboratory of Grassland Agro‐Ecosystems, School of Life SciencesLanzhou University Lanzhou PR China
6. College of Agriculture, Shanxi Agricultural University Taigu PR China