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Title:Trends of atrazine loss in NE Indiana at the catchment scale from 2006-15
Author(s):Gonzalez, Javier; Livingston, Stan
agricultural chemicals
Abstract:Pesticides control weeds, insects, and fungi to maintain productivity in agricultural systems to supply food and fiber to the growing population of the world; however, some pesticides may impair the environment. The trends of atrazine loss, the most common herbicide to control broadleaf weeds in corn in the US Midwest, was studied in a 193 km2 watershed in NE Indiana with 74% of the area dedicated to agriculture. From 2006 to 2015, daily samples were collected and analyzed for atrazine. The results show that the annual loading of atrazine decreased by 8.5 kg/year (p=0.067). However, the flow-weighted mean concentration (FWMC) of atrazine did not change (p=0.390). Also, the results indicated that the monthly FWMC exceeded the atrazine Maximum Concentration Level (3 ppb) in May and June, when the herbicide is applied.
Issue Date:2019-05-22
Series/Report:2019 Emerging Contaminants in the Environment Conference (ECEC19)
Genre:Conference Paper / Presentation
Date Available in IDEALS:2019-05-31

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