A stewardship program was conducted in the Youngs Creek Watershed located in northeastern Missouri.  Majority (~68%) of this 28.2 square mile watershed is composed of agricultural fields, and it is located within the central claypan USDA Major Land Resource Area 113, an area known for its potential agricultural runoff vulnerability. Adoptable and effective stewardship measures were identified and implemented to reduce atrazine residues exiting the watershed outlet in surface water.  Cultural and structural best management practices were tracked at the farm level through aerial field imaging and annual one-on-one grower interviews.  Atrazine residues were reduced through education, outreach and information exchange activities within the watershed.  Reduction in residues appear to correlate with label education activities and decreased average watershed use rates, increased no-till adoption, and increased use of a two-pass herbicide application system.

Atrazine stewardship in a Missouri watershed

248th National Meeting (2014)

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