Submitted to: Soil Science Society of America Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: September 1, 2007
Publication Date: November 8, 2007
Citation: Yates, S.R. 2007. S1 34841: simple analytical solutions to pesticide volatilization from soil with a change in surface condition. . Soil Science Society of America Annual Meeting. Paper No. 182-7 Technical Abstract: An analytical solution describing the fate and transport of volatile pesticides applied to soils has been developed. Two application methods can be simulated: point-source applications such as idealized shank or a hot-gas injection method and a more realistic shank-source application method that includes a vertical pesticide distribution in the soil domain including a soil fracture caused by a shank. The solutions allow determination of the volatilization rate and other information that could be important to understanding pesticide movement and in the development of regulations. The solutions can be used to characterize differences in emissions relative to changes in the soil degradation rate, surface barrier conditions, application depth, and soil packing. In some cases, simple algebraic expressions are provided that can be used to obtain the total emissions and total soil degradation. The solutions provide a consistent methodology for determining the total emissions and can be used with other information, such as field and laboratory experimental data, to support the development of fumigant regulations. The uses of the models are illustrated by several examples.