1. State Key Laboratory of Loess and Quaternary Geology; Institute of Earth Environment, Chinese Academy of Sciences; Xi'an 710061 China
2. Institute of the Surface-Earth System Science Research; Tianjin University; Tianjin 300072 China
3. Interdisciplinary Research Center of Earth Science Frontier; Beijing Normal University; Beijing 100875 China
4. The New Zealand Institute for Plant & Food Research Limited; Private Bag 4704 Christchurch 8140 New Zealand
5. Institute of Subtropical Agriculture, Chinese Academy of Sciences; Key Laboratory for Agro-ecological Processes in Subtropical Region; Changsha 410125 China
6. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences; Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research; Shijiazhuang 050021 China