Effects of Sewage Sludge on the Cadmium and Zinc Content of Crops

摘要

This report evaluates the available data on the effects on plants of single and repeated additions of Cd and Zn to soils in the form of sewage sludge. The concentrations of Cd and Zn in plants vary with (a) the species and cultivation grown, (b) environmental and management factors, (c) soil properties, (d) the annual and cumulative amounts of Cd and Zn applied to soils and (e) the plant sampled.