Sources and assessment of heavy metal contamination in water-level fluctuation zone of the Three Gorges Reservoir, China A review on environmental effects and control criteria of biosolid agricultural application Content, distribution, source and ecological risk of heavy metals in soils of Benggang areas in Southwest Fujian Assessment of heavy metal content and pollution in organic and conventional farming soils in North China Cd uptake and accumulation of Brassica napus varieties with different seed glucosinolate characteristics Absorption of different sorghum accessions on heavy metals in polluted soil