Fig. 3. Desorption isotherms for metolachlor (MET), metolachlor ethanesulfonic acid (ESA), and metolachlor oxanilic acid (OA) in vegetative filter strip soil (VFSS) and cultivated soil (CS). Each point is the mean and standard deviation of four replications. The error bars do not appear when they are smaller than the symbol for the mean. Calculations are based on the Freundlich equation.