Affiliation: | LI Xuyong;LI Baoguo;GUO Zhengtang;ZHAO Chengyi;SHI Yuanchun 1 Commission for Integrated Survey of Natural Resources, CAS, Beijing 100101, China. 2 Department of Soil and Water, China Agricultural University, Beijing 100094, China 3 Institute of Geology, CAS, Beijing 100029, China 4 Institute of Xinjiang Ecology and Geography, CAS, Urumqi 830011. China |