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Published online 13 September 2006
Published in J Environ Qual 35:1894-1902 (2006)
DOI: 10.2134/jeq2005.0444
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Combined Effects of Constant versus Variable Intensity Simulated Rainfall and Reduced Tillage Management on Cotton Preemergence Herbicide Runoff

Thomas L. Pottera,*, Clint C. Trumana, Timothy C. Stricklanda, David D. Boscha, Theodore M. Websterd, Dorcas H. Franklinb and Craig W. Bednarzc

a USDA-ARS, Southeast Watershed Research Laboratory, Box 748, Tifton, GA 31793
b USDA-ARS, J. Phil Campbell, Sr., Natural Resource Conservation Center, Watkinsville, GA
c Dep. Crop and Soil Science, University of Georgia, Coastal Plain Experiment Station, Tifton, GA
d USDA-ARS, Crop Protection and Management Research Unit, Box 748, Tifton, GA 31793


Figure 1
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  		Fig. 1. Average rainfall amounts for constant and variable intensity simulated rainfall patterns and runoff from plots as a function of tillage and simulated rainfall intensity pattern.

 

Figure 2
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  		Fig. 2. Average rainfall amounts for constant and variable intensity simulated rainfall patterns and soil loss as function of tillage management and rainfall intensity pattern.

 

Figure 3
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  		Fig. 3. Average pendimethalin concentration in runoff as a function of tillage and rainfall intensity pattern.

 

Figure 4
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  		Fig. 4. Cumulative pendimethalin loss expressed as percent of applied versus cumulative runoff during simulations.

 

Figure 5
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  		Fig. 5. Cumulative fluometuron loss expressed as percent of applied versus cumulative runoff during simulations.

 

Figure 6
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  		Fig. 6. Average fluometuron concentration in runoff as a function of tillage and rainfall intensity pattern.

 




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Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.