USGS - science for a changing world

Environmental Health - Toxic Substances

Photo Gallery

Encapsulated Herbicide Experiment

CLICK PHOTOS FOR AN ENLARGED VERSION

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
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

Equipment to capture runoff waters from experimental plots for later analysis, Topeka Experimental Field Site, Topeka, Kansas
Equipment to capture runoff waters from experimental plots for later analysis, Topeka Experimental Field Site, Topeka, Kansas

Zero-tension lysimeter used to capture water percolating through the unsaturated zone via macropores, Topeka Experimental Field Site, Topeka, Kansas
Zero-tension lysimeter used to capture water percolating through the unsaturated zone via macropores, Topeka Experimental Field Site, Topeka, Kansas

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
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

Experimental field plots where an encapsulated herbicide (atrazine) was applied, Topeka Experimental Field Site, Topeka, Kansas. Good weed control is evident
Experimental field plots where an encapsulated herbicide (atrazine) was applied, Topeka Experimental Field Site, Topeka, Kansas. Good weed control is evident

 

More Information

Related Photo Galleries

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.

Back To Main Photo Gallery Index

USGS Home Water Land Resources Science Systems Ecosystems Energy and Minerals Environmental Health Hazards

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: toxics.usgs.gov/photo_gallery/herbicide_experiment.html
Page Contact Information:
Page Last Modified: Wednesday, 23-Nov-2016 11:06:51 EST