Full TGIF Record # 36833
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Web URL(s):https://dl.sciencesocieties.org/publications/jeq/pdfs/25/1/JEQ0250010005
    Last checked: 12/14/2016
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Publication Type:
i
Refereed
Author(s):Veeh, R. H.; Inskeep, W. P.; Camper, A. K.
Author Affiliation:Veeh and Camper: Center for Biofilm Eng., College of Eng., Montana State Univ., Bozeman, MT 59717-0398; Inskeep: Dp of Plant, Soil, and Environ. Science, Montana State Univ., Bozeman, MT
Title:Soil depth and temperature effects on microbial degradation of 2,4-D
Section:Reviews and Analyses
Other records with the "Reviews and Analyses" Section
Source:Journal of Environmental Quality. Vol. 25, No. 1, January/February 1996, p. 5-12.
Publishing Information:Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
# of Pages:8
Keywords:TIC Keywords: Soil depth; Degradation; Temperatures; 2,4-D; Carbon
Abstract/Contents:"Numerous soil factors and climatic conditions affect the degradation rate of pesticides in soils. A major soil factor influencing herbicide degradation is the composition and abundance of the microbiota, which has been shown to vary considerably with soil depth. Another important variable affecting microbial growth and degradation kinetics is temperature. Soil samples from 0- to 30-, 30- to 60-, and 60- to 120-cm depths of two Montana soils were placed in reaction flasks and treated with ^D^]1Id]4C-labeled 2,4-D at representative field use rates at temperatures of 10, 17, and 24°C. A carrier gas was used to continuously evacuate evolved ^D^]1^D^]4CO^D^[2 into NaOH traps as a measure of 2,4-D degradation. Comparisons of the effects of soil depth and temperature were made by fitting experimental data to both first-order and logistic kinetic models. Degradation rates of 2,4-D decreased significantly with increasing soil depth and were positively correlated with bacterial plate counts. Effects of temperature on degradation rate constants were adequately described using the Arrhenius equation. Degradation rates of 2,4-D and bacterial enumerations were postiviely correlated with changes in soil organic C as a function of soil depth. These results support the idea that changes in organic C with soil depth could be used as a parameter for estimating changes in degradation rate as a function of soil depth. Efforts to model the transport of 2,4-D in soils should account for variation in degradation rate as a function of soil depth and temperature."
Language:English
References:46
See Also:Other items relating to: 2, 4 - D in Turf
Note:Figures
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Veeh, R. H., W. P. Inskeep, and A. K. Camper. 1996. Soil depth and temperature effects on microbial degradation of 2,4-D. J. Environ. Qual. 25(1):p. 5-12.
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Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/25/1/JEQ0250010005
    Last checked: 12/14/2016
    Requires: PDF Reader
    Notes: Item is within a limited-access website
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