Surface Water Quality Impacts of Conservation Tillage Practices on Burley Tobacco Production Systems in Southwest Virginia |
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| Authors: | Brian L. Benham Megan K. Laird Blake B. Ross David H. Vaughan Danny R. Peek |
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| Affiliation: | 1. Biological Systems Engineering Department, Virginia Tech, 209 Seitz Hall, Blacksburg, VA, 24061, USA
2. Southern Piedmont Ag Research and Extension Center, Virginia Tech, Blacksburg, VA, USA
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| Abstract: | A plot-scale, rainfall-simulation study measured edge-of-field pollutant losses from conventional-till, strip-till, and no-till treatments in a burley tobacco production system. The field experiment results show that the conventional-till treatment yielded more total runoff than strip- and no-till treatments. Compared to the conventional-till treatment, both no-till and strip-till reduced the total mass losses of total suspended solids (TSS), total nitrogen (TN), total Kjeldahl nitrogen (TKN), nitrate (NO-N), ammonia (NH3-N), total phosphorus (TP), orthophosphate (PO4-P), and the insecticide chlorpyrifos in runoff. Although statistical analyses indicated that there was no significant difference between the no-till and strip-till practices, the no-till practice consistently yielded less edge-of-field pollutant loss than the strip-till practice. This research reinforces the body of knowledge documenting the effectiveness of conservation-tillage practices in reducing edge-of-field pollutant losses. |
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