TOTAL AND PLANT AVAILABLE CONTENTS OF COPPER AND ZINC IN URBAN CULTIVATED RICE FARMLANDS .....

Forty composite samples were taken from eight planted rice farmlands and evaluated for total and plant accessible Copper and Zinc using the Atomic Absorption Spectrophotometric method. Some physicochemical properties of the soil samples were measured; for pH, all of the tested soil samples revealed varying levels of acidity, and the organic carbon concentrations ranged from 0.46 to 1.4 percent. Cu and Zn concentrations varied; the overall total Cu and Zn mean values were 9.8 and 35.8 mg/kg, respectively, whereas plant accessible Cu and Zn concentrations were 3.5 and 8.5 mg/kg, respectively. The overall order of relative availability in the examined soils demonstrated that Cu was removed in greater relative amounts than Zn, and the geo accumulation index revealed that the soil samples were uncontaminated to moderately contaminated. As a result of the ongoing use of fertilisers and other agricultural chemicals, as well as their potential impact on the food chain, there is a need for more regular monitoring of heavy metal levels in farmed rice farm fields.

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