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Facilitated Transport of Napropamide by Dissolved Organic Matter Through Soil Columns

C.F. Williamsa, M. Agassib, J. Leteya, W.J. Farmera, S.D. Nelsona and M. Ben-Hurb

a Dep. of Soils and Environ. Sci., Univ. of California, Riverside, CA 92521 USA
b Soil Erosion Res. Stn., Rupin Inst. Post, 60960, Israel



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Fig. 1 Concentration of napropamide, based on 14C activity, in the initial leachate from Domino, Hanford, and Tujunga soils. Error bars are ± 1 standard error of the mean

 


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Fig. 2 Napropamide concentration determined by gas chromatography (GC) and 14C activity. The predicted line is the line where napropamide measured by 14C activity is equal to GC

 


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Fig. 3 Concentration of dissolved organic matter (DOM) in the initial leachate from Domino, Hanford, and Tujunga soils. Error bars are ± 1 standard error of the mean

 


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Fig. 4 Distribution of napropamide in soil columns after termination of the leaching experiment. Error bars are ± 1 standard error of the mean

 


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Fig. 5 Plot of napropamide concentration vs. dissolved organic matter in the leachate. Error bars are ± 1 standard error of the mean

 





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