TY - Journal of Yangtze River Scientific Research Institute A1 - ZHANG Di-meng, HU Yan-ping, WANG Zhen-hua, LI Qing-yun, LI Guan-ya T1 - Influence of Exogenous Humic Acid on Heavy Metal Cd Activity in Clayey Farmland Soil Y1 - 2020-02-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 68 EP - 71 VL - 37 IS - 2 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20181110 ER -