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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/26/4/JEQ0260041072
Last checked: 12/12/2016
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| Publication Type:
| Refereed |
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| Author(s): | Wang, D.;
Yates, S. R.;
Gan, J. |
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| Author Affiliation: | Soil Physics and Pesticides Res. Unit, U.S. Salinity Laboratory, 450 West Big Springs Road, Riverside, CA 92507-4617 |
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| Title: | Temperature effect on methyl bromide volatilization in soil fumigation |
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| Section: | Organic Chemicals in the Environment
Other records with the "Organic Chemicals in the Environment" Section
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| Source: | Journal of Environmental Quality. Vol. 26, No. 4, July/August 1997, p. 1072-1079. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Temperatures; Methyl bromide; Gases; Inhibitors; Soil fumigation; Volatility; Atmosphere; Environmental effects
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| Abstract/Contents: | "Recent interest in characterizing methyl bromide emission has focused in field and laboratory measurements, which are expensive to conduct and very time consuming. Predicting methyl bromide volatilization with numerical or analytical modes has been limited to idealized situations without considering environmental conditions such as diurnal temperature change. It has been found that temperature can strongly affect methyl bromide volatilization under field conditions. To quantitatively characterize temperature effect, we adopted a two-dimensional numerical model that can solve simultaneous equations of water, heat, and solute transport (including both liquid and vapor phases). Functional relationships were established between temperature and methyl bromide liquid-gas phase partition coefficient or the Henry's constant, diffusion coefficient in soil air space, and the permeability of polyethylene tarp. To test the model, soil properties and boundary conditions from Yates et al. (1996a,b,c) were used. The model prediction was completely independent of the field measurement. The model simulation by considering diurnal variations of soil temperature predicted the cumulative emission that agreed well with the measured flux density. Comparable results were also obtained for methyl bromide concentration in the soil profile. The key advantage of this model is its ability od describing diurnal variations in methyl bromide emission flux. Based on the temperature effect of temporal variations of methyl bromide emission, we believe that small sampling intervals are needed to determine the dynamic nature of methyl bromide emission under field conditions, especially during the first 24 h application." |
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| Language: | English |
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| References: | 32 |
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| See Also: | Other items relating to: MEBR |
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| Note: | Equations
Figures
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wang, D., S. R. Yates, and J. Gan. 1997. Temperature effect on methyl bromide volatilization in soil fumigation. J. Environ. Qual. 26(4):p. 1072-1079. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/26/4/JEQ0260041072
Last checked: 12/12/2016
Requires: PDF Reader
Notes: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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