Submitted to: Proceedings of American Chemical Society National Meeting
Publication Type: Abstract Only
Publication Acceptance Date: May 14, 2008
Publication Date: August 18, 2008
Citation: Potter, T.L., Bosch, D.D., Strickland, T.C. 2008. Tillage-system Impact on Surface Runoff and Interflow Transport of Selected Herbicides at the Field Scale [abstract]. Proceedings of American Chemical Society National Meeting 8/17-21/2008, Philadelphia, Pennsylvania. Technical Abstract: Worldwide interest in conservation-tillage (CsT) of agricultural soils is increasing. Potential benefits include reductions in erosion and surface runoff of agrichemicals, increases in soil organic carbon content, and more efficient water use. However, net benefits on soil water availability and the potential for negative consequences due to leaching of agrichemicals remain poorly documented. For the past ten years our research group has focused on field-scale assessment of strip-tillage management in the Southern Atlantic Coastal Plain (USA) during rotational cotton and peanut production. Strip-tillage (ST) is a form of CsT which involves planting into strips tilled in cover crop surface mulch. ST is favored by farmers in the region. In this presentation we describe measurements of surface runoff and interflow transport of cotton preemergence herbicides. Generally CsT management contributed to reduced surface runoff but increased edge-of-field subsurface losses. Implications will be discussed in the context of the South Georgia landscape.