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Mechanism of Trifluralin Diffusion in Silt Loam Soil

Published online by Cambridge University Press:  12 June 2017

L. E. Bode ,
C. L. Day ,
M. R. Gebhardt  and
C. E. Goering
L. E. Bode
Affiliation:
U.S. Dep. of Agr., U.S. Delta States Agr. Res. Center, Stoneville, MS 38776; Agr. Res. Serv., U.S. Dep. of Agr. and Agr. Engr. Dep., Univ. of Missouri, Columbia, MO 65201
C. L. Day
Affiliation:
U.S. Dep. of Agr., U.S. Delta States Agr. Res. Center, Stoneville, MS 38776; Agr. Res. Serv., U.S. Dep. of Agr. and Agr. Engr. Dep., Univ. of Missouri, Columbia, MO 65201
M. R. Gebhardt
Affiliation:
U.S. Dep. of Agr., U.S. Delta States Agr. Res. Center, Stoneville, MS 38776; Agr. Res. Serv., U.S. Dep. of Agr. and Agr. Engr. Dep., Univ. of Missouri, Columbia, MO 65201
C. E. Goering
Affiliation:
U.S. Dep. of Agr., U.S. Delta States Agr. Res. Center, Stoneville, MS 38776; Agr. Res. Serv., U.S. Dep. of Agr. and Agr. Engr. Dep., Univ. of Missouri, Columbia, MO 65201
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Abstract

Diffusion of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) through Mexico silt loam soil was measured in diffusion cells under laboratory conditions. Radiolabeled herbicide was extracted from each sample and counted by liquid scintillation. Fick's Second Law with a constant diffusion coefficient adequately describes trifluralin diffusion regardless of concentration or diffusing time. Solution diffusion increases directly with bulk densities to 1.1 g/cm3 and then decreases. Vapor diffusion is decreased approximately 50% for every 10% decrease in air-filled porosity. Vapor diffusion contributes the major portion of total diffusion at bulk densities of less than 1.2 g/cm3. For bulk densities between 1.2 and 1.4 g/cm3, the magnitudes of vapor and solution diffusion are similar.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 5 , September 1973 , pp. 480 - 484
Copyright
Copyright © 1973 Weed Science Society of America 

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References

Literature Cited

1. Clarke, A. L. and Graham, E. R. 1958. Zinc diffusion and distribution coefficients in soil as affected by soil texture, zinc concentration and pH. Soil Sci. 105:409–417.CrossRefGoogle Scholar
2. Crank, J. 1956. The mathematics of diffusion. Oxford Clarendon Press, Oxford, England. 121 pp.Google Scholar
3. Ehlers, W., Letey, J., Spencer, W. F., and Farmer, W. J. 1969. Lindane diffusion in soils: 1. Theoretical considerations and mechanism of movement. Soil Sci. Soc. Amer. Proc. 33:501–504.Google Scholar
4. Graham-Bryce, J. 1969. Diffusion of organophosphorus insecticides in soils. Agr. Food Chem. J. 20:489–494.Google Scholar
5. Hartley, G. S. 1964. Herbicide behavior in the soil. Part I – Physical factors and action through the soil. Pages 111–161 in Audus, L. J., ed. The physiology and biochemistry of herbicides. Academic Press, N.Y. Google Scholar
6. Helling, C. S. 1970. Movement of s-triazine herbicides. Residue Rev. 32:175–210.Google ScholarPubMed
7. Jackson, R. D. 1964. Water vapor diffusion in relatively dry soil: I Theoretical considerations and sorption experiments. Soil Sci. Soc Amer. Proc. 28:172–176.Google Scholar
8. Jackson, R. D. 1965. Water vapor diffusion in relatively dry soil: IV Temperature and pressure effects on sorption diffusion coefficients. Soil Sci. Soc. Amer. Proc. 29:144–148.CrossRefGoogle Scholar
9. Lindstrom, F. T., Boersma, L., and Gardner, H. 1968. 2,4-D Diffusion in saturated soil. A mathematical theory. Soil Sci. 106:107–113.Google Scholar
10. Millington, R. J. 1959. Gas diffusion in porous media. Science 30:100–102.CrossRefGoogle Scholar
11. Millington, R. J. and Shearer, R. C. 1970. Diffusion in aggregated porous media. Soil Sci. 3:372–377.CrossRefGoogle Scholar
12. Porter, L. K., Kemper, W. D., Jackson, R. D., and Stewart, B. A. 1960. Chloride diffusion in soils as influenced by moisture content. Soil Sci. Soc. Amer. Proc. 24:460–463.Google Scholar
13. Spencer, W. F., Cliath, M. M., and Farmer, W. J. 1969. Vapor density of soil-applied dieldrin as related to soil-water content, temperature, and dieldrin concentration. Soil Sci. Soc. Amer. Proc. 33:509–511.CrossRefGoogle Scholar
14. Upchurch, R. P. 1966. Behavior of herbicides in soils. Residue Rev. 16:46–85.Google Scholar