1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess PlateauNorthwest A&F University Yangling Shaanxi 712100 PR China
2. Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water Resource Yangling Shaanxi 712100 PR China
3. Department of Soil and WaterExperimental Station of Aula Dei (EEAD‐CSIC) Zaragoza Aragon 50059 Spain
4. Ningxia Baofeng Ecological Ranch Co., Ltd. Yingchuan Ningxia 750001 PR China
5. CAS Center for Excellence in Quaternary Science and Global Change Xi'an Shaanxi 710061 PR China