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United States Department of Agriculture

Agricultural Research Service

Title: Gas Diffusion in Soil: Model Calibration Using Data Collected During a Field Scale Fumigation Study

item Mutziger, A - UC RIVERSIDE
item Yates, Scott
item Wang, Dong

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

Technical Abstract: Methyl Bromide (MeBr) was injected into a non-covered Greenfield sandy loam field using a tractor with two shanks spaced 1.68 m apart. The depth of injection was 0.68 m and the rate of injection was 330 kg MeBr ha(super -1). MeBr concentrations in the soil air were determined for a two month period after the injection. Although these data were too sparse to completely describe the transport and transformation of MeBr shortly after the injection, they serve as calibration points for model optimization. Presented material will include comparisons between measured and modeled MeBr concentrations in the soil profile. Exposure data will also be presented as concentration-time (CT) curves with depth.

Last Modified: 4/22/2015
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