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Movement and Persistence of Picloram in Pasture Soils of Nebraska

Published online by Cambridge University Press:  12 June 2017

C. J. Scifres ,
O. C. Burnside  and
M. K. McCarty
C. J. Scifres
Affiliation:
Crops Research Division, Agr. Res. Ser., U. S. Dep. of Agr., Lincoln, Nebraska
O. C. Burnside
Affiliation:
Department of Agronomy, University of Nebraska, and Crops Research Division, Agr. Res. Ser., U. S. Dep. of Agr., Lincoln, Nebraska
M. K. McCarty
Affiliation:
Department of Agronomy, University of Nebraska, and Crops Research Division, Agr. Res. Ser., U. S. Dep. of Agr., Lincoln, Nebraska
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Abstract

More 4-amino-3,5,6-trichloropicolinic acid (picloram) was detected in soil samples by soybean (Glycine max (L.) Merr., var. Ford) bioassay when the herbicide was applied in the fall than when it was applied in the spring to several pasture types. Downward movement was greater in sandy loam than in silty clay loam. Dissipation of picloram was greatest in the upper 12 inches regardless of soil type. More picloram was detected in the 24 to 36-inch depth from plots treated 1, 2, or 3 years before sampling than in plots sampled the year of treatment. This indicated downward movement into the subsoil.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 486 - 488
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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