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Soil Persistence of Dinitramine

Published online by Cambridge University Press:  12 June 2017

J. A. Poku  and
R. L. Zimdahl
J. A. Poku
Affiliation:
Weeds Res. Lab., Dep. Bot. and Plant Pathol., Colorado State Univ., Ft. Collins, 80523
R. L. Zimdahl
Affiliation:
Weeds Res. Lab., Dep. Bot. and Plant Pathol., Colorado State Univ., Ft. Collins, 80523
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Abstract

The effects of soil temperature, moisture, and herbicide concentration on the rate of degradation of dinitramine (N 4,N 4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) were measured in clay loam and sandy loam in the laboratory. In sandy loam, the rate of degradation increased with increasing temperature. In clay loam, the rate of degradation increased from 10 to 30 C and decreased at 40 C. Soil moisture content influenced the rate of degradation in the following order: 22>11>>2.2% (air-dry) for clay loam and 12.0 = 6.0>>0.5% (air-dry) for sandy loam. First-order half-lives ranged from 3.2 at 30 C to 47 weeks at 10 C in clay loam, and 2.3 at 40 C to 31 weeks at 10 C in sandy loam. Applications in 2 yr did not cause buildup of dinitramine in the field. A mathematical model was used in an attempt to correlate laboratory and field data.

Keywords

Soil degradationkinetic analysistemperaturemoistureherbicide concentration

Information

Type
Research Article
Information
Weed Science , Volume 28 , Issue 6 , November 1980 , pp. 650 - 654
Copyright
Copyright © Weed Science Society of America 

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