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Runoff and Drainage Losses of Atrazine, Metribuzin, and Metolachlor in Three Water Management Systems

J.D. Gaynor*,a, C.S. Tana, C.F. Drurya, T.W. Welackya, H.Y.F. Nga,b and W.D. Reynoldsa

a Crops Research Centre, Agriculture and Agri-Food Canada, 2585 County Road E, Harrow, ON, N0R 1G0 Canada
b National Water Research Institute, Environment Canada, Burlington, ON, L7R 4A6 Canada



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Fig. 1. Daily rainfall at Woodslee, Ontario for 1995 and 1996. Numbers correspond to rain events in Table 2 and arrows indicate herbicide application.

 


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Fig. 2. Cumulative herbicide loss in runoff and drainage (mg or g ha-1) and accompanying depth of runoff and drainage (mm) for each rain event from three water management treatments in 1995.

 


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Fig. 3. Cumulative herbicide loss in runoff and drainage (g ha-1) and accompanying depth of runoff and drainage (mm) for each rain event from three water management treatments in 1996.

 





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