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The Fate of Oryzalin Applied to Straw-mulched and Nonmulched Soils

Published online by Cambridge University Press:  12 June 2017

Philip A. Banks  and
Edward L. Robinson
Philip A. Banks
Affiliation:
Agron. Dep., Univ. of Georgia, Athens, GA 30602
Edward L. Robinson
Affiliation:
Plant Physiol., South. Piedmont Conserv. Res. Ctr., Agric. Res. Serv., U.S. Dep. Agric., Watkinsville, GA 30677
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Abstract

Field experiments to compare the loss of oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) from straw-mulched and nonmulched soils indicated that oryzalin disappeared more rapidly in soils covered by straw in 1980 and 1981 but not in 1982. It appeared that greater rainfall in 1982 was responsible for this difference. Straw mulch on the soil at the time of application reduced the amount of oryzalin reaching the soil surface after subsequent rains or irrigation. Straw levels of 2250 or 4500 kg/ha, when present at the time of treatment, reduced oryzalin concentration in the soil by approximately 15 or 43%, respectively, following 1.3 cm of water applied by sprinkle irrigation. Increasing the straw levels above 4500 kg/ha did not significantly affect the amount of oryzalin detected in the soil beneath the straw mulch.

Keywords

Conservation tillageno-tilldouble-croppingwheatsoybeans
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 2 , March 1984 , pp. 269 - 272
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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