Fig. 5. The average fraction (F_C) of complexed napropamide within the specified range of molecular weights is plotted for each effluent sample from the soil with sewage sludge applied (SS). The fraction of complexed napropamide is 1 for each effluent sample but the total amount of complexed napropamide is different for each sample. Therefore, the fraction of napropamide complexed with a molecular weight between 500 and 1000 Daltons is similar for the 165- and 225-mL samples but the total amount of complex is lower for the 225-mL sample than the 165-mL sample.