Herbicide Leaching in Coastal Plain Soil
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 3
Abstract
The movement of atrazine, simazine, cyanazine, and metolachlor was studied for two years under conventional tillage and no‐tillage corn. Ground water and soil samples were analyzed for the herbicides. Atrazine and simazine were detected in the ground water more frequently than metolachlor or cyanazine. In 1987, the herbicides were leached to the ground water nine days after they were applied when 31.5 mm of rainfall occurred. At the 3.0 m depth atrazine concentrations ranged from 0 to 17 μg/L. There was no significant difference in herbicide movement between conventional tillage and no tillage. The frequency of the herbicides detected in the ground water was directly related to the soil half‐life of the herbicide. Concentrations of the herbicides detected in the ground water were not related to the water solubility of the herbicide. The research demonstrates pesticides may move to shallow ground water by macropore flow in the sandy soils of the Mid Atlantic states if sufficient rainfall occurs shortly after they are applied.
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References
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Delaware Department of Agriculture. (1991). “Delaware agri‐facts.” Rep., AF‐10‐91, (May 31), Dover, Del.
2.
Pickett, T. E. (1969). “The availability of ground water in eastern Sussex County.” Rep., Water Resources Center, University of Delaware, Newark, Del.
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U.S. Environmental Protection Agency (EPA). (1990). “National pesticide survey state sampling results.” Rep., Office of Pesticide and Toxic Substances, EPA, Washington, D.C.
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Wilkerson, M. R., and Kim, K. D. (1986). “The pesticide contamination act: setting specific numerical values.” Rep., California Department of Agriculture and Food, Environmental Monitoring and Pest Management, Sacramento, Calif.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 3 • May 1994
Pages: 634 - 649
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Oct 30, 1991
Published online: May 1, 1994
Published in print: May 1994
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