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  1. Using GLEAMS to Select Environmental Windows for Herbicide Application in Forests

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    Author(s): M.C. Smith; J.L. Michael; W.G. Koisel; D.G. Nealy
    Date: 1994
    Source: In: Campbell, K.L.; Graham, W.D.; Bottcher, A.B., eds. Proceedings of the environmental sound agriculture conference; 1994 April 20-22; Orlando, FL. St.Joseph, MI: American Society of Agricultural Engineers: 506-512
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (148 KB)

    Description

    Observed herbicide runoff and groundwater data from a pine-release herbicide application study near Gainesville, Florida were used to validate the GLEAMS model hydrology and pesticide component for forest application. The study revealed that model simulations agreed relatively well with the field data for the one-year study. Following validation, a modified version of GLEAMS was applied using a 50 year climatic record to determine the periods (windows) for least water quality degradation within the Forest Service's recommended application window for best vegetation control. The pesticide component of GLEAMS was modified to simulate up to 245 pesticides simultaneously. Four herbicides commonly used in the region to control competing vegetation were represented in the model study. Within the application windows for each herbicide, the best application dates, or "environmental" windows were determined to minimize environmental effecfects for each location. Results of the simulation study are tabulated in the paper for use in the forest industry.

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    Citation

    Smith, M.C.; Michael, J.L.; Koisel, W.G.; Nealy, D.G. 1994. Using GLEAMS to Select Environmental Windows for Herbicide Application in Forests. In: Campbell, K.L.; Graham, W.D.; Bottcher, A.B., eds. Proceedings of the environmental sound agriculture conference; 1994 April 20-22; Orlando, FL. St.Joseph, MI: American Society of Agricultural Engineers: 506-512

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