The forms of Cd in soils of Zhang-Shi Irrigation Area were reported in this paper. 78%of Cd existed in the soils is in exchangable form, 18%is in available form and only 3-4%is in insoluble form and in alkali-soluble form.In acid soils Cr is the major constituent of inorganic ligands which is incorporated with Cd to formCCdCl]-and CdCl2.In the case of adding limes and Ca-Mg-P fertilizers, the concentration of HCO3-in soils was increased and Cd(HCO3)2was formed and precipitated. In another case when the soil...