Accumulation and bioavailability of heavy metals in a soil-wheat/ maize system with long-term sewage sludge amendments
YANG Guo-hang, ZHU Guang-yun, LI He-lian, HAN Xue-mei, LI Ju-mei, MA Yi-bing
Journal of Integrative Agriculture . 2018, (08): 1861 -1870 .  DOI: 10.1016/S2095-3119(17)61884-7