Formulation and tillage effects on atrazine and alachlor in shallow ground water in upland corn production

At the Mississippi Agricultural and Forestry Experiment Station, located at Holly Springs, the movement of atrazine and alachlor in shallow groundwater was examined under upland corn production. Both emulsifiable-concentrate and controlled-release formulations of each herbicide were used, and two ti...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2001-07, Vol.67 (1), p.113-121
Main Authors: SMITH, S. JR, JOHNSON, R. M, PEPPERMAN, A. B
Format: Article
Language:English
Subjects:
Acetamides - analysis
Agriculture - methods
Agronomy. Soil science and plant productions
Alachlor
Applied sciences
Atrazine
Atrazine - analysis
Biological and medical sciences
Crop production
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Groundwaters
Herbicides
Herbicides - analysis
Natural water pollution
Pollution
Soil and water pollution
Soil Pollutants - analysis
Soil science
Water Movements
Water Pollutants, Chemical - analysis
Water Supply
Water treatment and pollution
Zea mays
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Summary:At the Mississippi Agricultural and Forestry Experiment Station, located at Holly Springs, the movement of atrazine and alachlor in shallow groundwater was examined under upland corn production. Both emulsifiable-concentrate and controlled-release formulations of each herbicide were used, and two tillage practices, no-till and conventional tillage, were considered. Concentrations of both herbicides decreased in shallow groundwater with increasing time after application. For initial groundwater-producing rainfall events, the emulsifiable-concentrate formation produced higher groundwater concentrations than the controlled-release formulation, and concentrations tended to be higher under no-till than under conventional tillage. In addition, weed counts in the plots receiving the emulsifiable-concentrate formulation were significantly higher than in the controlled-release plots in all years of the study.
ISSN:0007-4861
1432-0800
DOI:10.1007/s001280098