Adsorption and Desorption of Metolachlor and Metolachlor Metabolites in Vegetated Filter Strip and Cultivated Soil
L. J. Krutz*,a,
S. A. Sensemana,
K. J. McInnesa,
D. W. Hoffmanb and
D. P. Tierneyc
a Department of Soil and Crop Science, Texas Agricultural Experiment Station, Texas A&M University, College Station, TX 77843-2142
b Blackland Research Center, Texas Agricultural Experiment Station, Temple, TX 76502
c Environmental Stewardship and Regulatory Policy, Syngenta Crop Protection, P.O. Box 18300, Greensboro, NC 27419

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Fig. 1. Chemical structure of metolachlor, metolachlor ethanesulfonic acid (ESA), and metolachlor oxanilic acid (OA).
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Fig. 2. Adsorption 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.
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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.
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Copyright © 2004 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.