[Zhu, Qiuan; Peng, CH; Peng, Changhui; Wang, Meng; Yang, Yanzheng; Wang, Han] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China.
[Zhu, Qiuan; Peng, CH; Peng, Changhui] Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal H3C 3P8, PQ, Canada.
[Liu, Jinxun] US Geol Survey, Western Geog Sci Ctr, Menlo Pk, CA 94025 USA.
[Jiang, Hong] Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China.
[Fang, Xiuqin] Hohai Univ, Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.