Some thoughts on the classification of soil environmental quality for agricultural land: taking risk control of Cd in potato producing area of Guizhou as an example
SONG Jing，XU Genyan，LUO Yongming，GAO Hui，TANG Wei
Earth Science Frontiers . 2019, (6): 192 -198 .  DOI: 10.13745/j.esf.sf.2019.10.3