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United States Department of Agriculture

Agricultural Research Service

Title: PREDICTING AND INTERPRETING FIELD BEHAVIOR OF FUMIGANTS USING CONTROLLED EXPERIMENTATION - MODEL EXTRAPOLATION APPROACH

Authors
item Gan, J. - U.C. RIVERSIDE
item YATES, SCOTT
item Wang, Dong
item Ernst, F. - U.C. RIVERSIDE
item Jury, W. - U.C. RIVERSIDE

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: June 15, 1996
Publication Date: N/A

Technical Abstract: Because of the involvement of numerous processes, field studies to monitor fumigants volatilization are extremely expensive to conduct, and the results are often difficult to comprehend. Experiments under controlled conditions may be used to aid both the design and results interpretation of field studies. A series of column experiments were completed in which 1,3-D or methyl bromide was applied at various depths under different surface (tarped or untarped) or soil (different soil types, water content or bulk density) conditions. The measured volatilization rate was then extrapolated to field-like scenarios using gas transport models. The results indicate the optimal conditions under which fumigants volatilization may be drastically minimized and provide information with which the variation from previous field studies may be adequately explained.

Last Modified: 8/27/2014
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