Technical amounts of Diuron (31.3 mg/L) was dissolved in 1 L distilled water and used as a stock solution
throughout the experiments and used to prepare the standard solutions. Further dilutions were made to obtain the
needed concentration as planned in the experiments. The following concentrations of Diuron were prepared and
tested 0.055, 0.11, 0.22, 0.44, and 0.88 mg/kg soil.