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Soil Surface Structure Effect on Isoproturon and Diflufenican Loss in Runoff

Véronique Lecomte*,a,c, Enrique Barriusob, Louis-Marie Bressonb, Caroline Kochb and Yves Le Bissonnaisa

a INRA, Avenue de la Pomme de Pin, BP 20619 Ardon, 45166 Olivet Cedex, France
b INRA/INA-PG, BP 01, 78850 Thiverval-Grignon, France
c BRGM, 3 Avenue Claude Guillemin, 45060 Orléans Cedex, France



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  		Fig. 1. Influence of soil surface structure on runoff from 10-m2 plots (n = 2).

 


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  		Fig. 2. Influence of soil surface structure on sediment concentrations in runoff from 10-m2 plots (n = 2).

 


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  		Fig. 3. Influence of soil surface structure on cumulative sediment yield from 10-m2 plots (n = 2).

 


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  		Fig. 4. Isoproturon (IPU) and diflufenican (DFF) concentrations during runoff from 10-m2 plots for the three soil surface structures (n = 2). Note the logarithmic scale on the y axis.

 


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  		Fig. 5. Isoproturon (IPU) and diflufenican (DFF) concentrations during runoff from 0.25-m2 plots for two soil surface structures (n = 3). Note the logarithmic scale on the y axis.

 


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  		Fig. 6. Measured and simulated isoproturon (IPU) concentrations during runoff for field tests on an F12 soil surface state (n = 6). Note the logarithmic scale on the y axis.

 




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