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Published online 17 July 2007
Published in J Environ Qual 36:1301-1309 (2007)
DOI: 10.2134/jeq2006.0526
© 2007 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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Summer Cover Crops Reduce Atrazine Leaching to Shallow Groundwater in Southern Florida

Thomas L. Pottera,*, David D. Boscha, Hyun Joob, Bruce Schafferc and Rafael Muñoz-Carpenad

a USDA-ARS, Southeast Watershed Research Lab., P.O. Box 748, Tifton, GA 31793
b Dep. of Environmental and Molecular Toxicology, North Carolina State Univ., Raleigh, NC
c Tropical Research and Education Center, Univ. of Florida, Homestead, FL 33031
d Dep. of Agricultural and Biological Engineering, Univ. of Florida, Gainesville, FL. Mention of trade names or commercial products is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture


Figure 1
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  		Fig. 1. Location of study site, research plots, and water sample collection points.

 

Figure 2
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  		Fig. 2. Rainfall, water table elevation, and timing of atrazine applications. NGVD, National Geodetic Vertical Datum of 1929.

 

Figure 3
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  		Fig. 3. Median atrazine concentration in canal and well samples by season (wet and dry) and year when samples were collected.

 

Figure 4
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  		Fig. 4. Median desethylatrazine concentration in canal and well samples by season (wet and dry) and year when samples were collected.

 

Figure 5
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  		Fig. 5. Median desisopropylatrazine concentration in canal and well samples by season (wet and dry) and year when samples were collected.

 

Figure 6
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  		Fig. 6. Median hydroxyatrazine concentration in canal and well samples by year season (wet and dry) when samples were collected.

 

Figure 7
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  		Fig. 7. Median measured chlorotriazine concentration in no cover crop plot and cover crop plots well by season. Chlorotriazine (CT) level is expressed in "atrazine equivalents." COV, cover crop plots. NOCOV, no cover crop plots.

 




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Copyright © 2007 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.