Heavy metal concentration and ion stability constant also explained the lower Cd content observed in soil amended with OFMSW than that of control soil. Cd-log Kf of different organic acids has been reported to be lower than those of other metals that compete with Cd to form organo-metallic complexes. In addition, Cd concentration in soil was lower than the other heavy metals competing with Cd. For example, Zn has been reported Plant yields affect positively or negatively total heavy metal uptake. Low heavy metal uptake of plants treated with EDDS was due to plant dead at the end of the trials. Plant in this case showed both chlorotic and necrotic symptoms, probably because of the toxicity from both heavy metals and EDDS. Metal toxicity could be attributed to the excess of soluble heavy metals caused by the addition of EDDS. Direct EDDS toxicity has been previously reported for plant, including maize. On the other hand soil treated with the OFMSW, showed the highest performance in the heavy metal uptake. These results depended on both the ability of DOM to mobilize heavy metals, such as before explained, and the fertilizing effect of OFMSW, which stimulated biomass production.to depress Cd plant uptake.