RT Journal T1 Accumulation Characteristics and Evaluation of Heavy Metals in Suburban Farmland Soils of Tianjin A1 ZHANG You-wen, HAN Jian-hua, TU Qi, YANG Yong-an, XU Yan, SHI Rong-guang PB Journal of Ecology and Rural Environment FD YR 2019 JF Journal of Ecology and Rural Environment JO Journal of Ecology and Rural Environment VO 35 IS 11 SP 1445 DO 10.19741/j.issn.1673-4831.2018.0693 K1 Tianjin suburb;farmland soil;heavy metal;accumulation characteristics LK {http://www.ere.ac.cn/EN/article/article_11712.shtml}