Fig. 1 Metolachlor concentrations in soil solution vs. reaction time. Symbols are for different initial concentrations (C_i) of 5, 10, 20, 40, 60, 80, and 100 µg mL^-1 (from bottom to top). Solid curves are simulations using both adsorption and desorption batch data sets, and dashed curves are simulations using adsorption data sets only