Encapsulated Herbicide Experiment
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Experimental test plot with suction-cup lysimeters (white pipes) installed at various depths to measure the transport of herbicides in the unsaturated zone, Topeka Experimental Field Site, Topeka, Kansas
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Equipment to capture runoff waters from experimental plots for later analysis, Topeka Experimental Field Site, Topeka, Kansas
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Zero-tension lysimeter used to capture water percolating through the unsaturated zone via macropores, Topeka Experimental Field Site, Topeka, Kansas
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Incorporating an encapsulated herbicide (atrazine) into the soil as part of an experiment to determine if encapsulating herbicides reduces runoff. The white pipes are suction-cup lysimeters used to sample water from the unsaturated zone
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Experimental field plots where an encapsulated herbicide (atrazine) was applied, Topeka Experimental Field Site, Topeka, Kansas. Good weed control is evident
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References
- Mills, M.S., and Thurman, E.M., 1994, Reduction of nonpoint-source contamination of surface water and ground water by starch encapsulation of herbicides: Environmental Science and Technology, v. 28, p. 73-79.
- Mills, M.S., Thurman, E.M., Wing, R.E., and Barnes, P.L., 1991, Dissipation of starch-encapsulated herbicides--A field comparison with powdered herbicides, in Mallard, G.E., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the technical meeting, Monterey, California, March 11-15, 1991: U.S. Geological Survey Water-Resources Investigations Report 91-4034, p. 203-209.
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