2017 36 (1):  316-326    ISSN: 1004-5589:  CN: 22-1111/P Available state transformation efficiency of soil copper and zinc in central-western Jilin and its natural impact factors LI Rong-xing, WANG Dong-yan, LI Wen-bo College of Earth Sciences, Jilin University, Changchun 130061, China Received 2016-09-18  Revised 2016-12-09  Online 2017-03-25 Reference   Corresponding author: