Evaluation to heavy metals pollution in agricultural soil in northern suburb of Xuzhou City

The situation of soil contamination with heavy metals in agricultural soil in the northern suburb of Xuzhou City was studied. The results indicate that the average contents of heavy metals(Cu, Cd, Pb, Zn, Cr) in the soil exceed the background values. The soil has been seriously contaminated with Cd and Cr. Pollution of Zn is at the warning-grade, while others are at the safe-grade. The order of integrated contamination index is Cr＞Cd＞Zn＞Cu＞Pb.