[Parameters: Topic='AGRICULTURE', Term='SOILS', Variable_Level_1='SOIL ABSORPTION']
Determination of the Environmental Fate and Transport of Methyl BromideEntry ID: USDA0574
Abstract: The primary objective of "Determination of the Environmental
Fate and Transport of Methyl Bromide" is to determine soil
reactions, the transport characteristics, volatile emissions and
mass partitioning of methyl bromide to assess the environmental
impacts of the agricultural use of methyl bromide. This research
will provide the necessary information to determine,
scientifically, the environmental ... effects from the agricultural
use of methyl bromide.
Collection Organization: University of California, Riverside
Collection Methodology: Field experiments have been conducted to
quantity methyl bromide emissions. The field studies were
conducted on a 10-acre plot; the plot was covered with a tarp
for the first experiment, and the soil left bare for the second
experiment. The results of the first experiment, in which a mass
balance was conducted, indicated that approximately 40% of the
applied methyl bromide volatilized into the atmosphere. Very
preliminary analyses of the data from the second (non-tarped)
experiment indicate that approximately 30-40% of the applied
methyl bromide volatilzed. Laboratory column studies have
demonstrated that methyl bromide emissions can be siginificantly
reduced by the addition of water to soil.
Collection Frequency: Ongoing.
Update Characteristics: Ongoing.
Data Center: University of California, Riverside
Dissemination Media: Available in hard copy publications.
Access Instructions: Contact the data center
Access Restrictions: None
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Start Date: 1993-01-01Stop Date: 1996-12-31
AGRICULTURE > AGRICULTURAL CHEMICALS > PESTICIDES
AGRICULTURE > SOILS > SOIL ABSORPTION
AGRICULTURE > SOILS > SOIL MOISTURE/WATER CONTENT
ATMOSPHERE > AIR QUALITY > EMISSIONS
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES > METHYL BROMIDE
LAND SURFACE > SOILS > SOIL ABSORPTION
LAND SURFACE > SOILS > SOIL CHEMISTRY
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > METHYL BROMIDE
Quality Standard scientific protocols used; EPA Best Lab Practices
standards applied where possible in analysis.
Role: TECHNICAL CONTACT
Email: mvyates at ucrac1.ucr.edu
University of California College of Agricultural Sciences Soil and Environmental Sciences 135 Bourns Hall
Province or State: CA
Postal Code: 92521
Gan, J., Yates, S.R., Spencer, W.F. and Yates, M.V. 1994.
Automated headspace analysis of fumigants 1,3-dichloropropene
and methyl isothiocyanate on charcoal sampling tubes. J.
Chromatography A 684:121-131.
Gan, J., Yates, S.R., Anderson, M.A., Spencer, W.F., Ernst,
F.F., and Yates, M.V. 1994. Effects of soil properties on
degradation and sorption of methyl bromide in soils. Chemosphere
Gan, J., Yates, S.R., Spencer, W.F., and Yates, M.V.
Optimization of analysis of methyl bromide on charcoal sampling
tubes. J. Agric. and Food Chem., in press.
Yates, S.R., Ernst, F.F., Gan, J., and Spencer, W.F..
Quantifying methyl bromide losses from agricultural fields.
Creation and Review Dates
DIF Creation Date: 2005-09-12
Last DIF Revision Date: 2007-06-29