Document Type

Article

Publication Date

1-1990

Abstract

Herbicide desorption isotherms may be affected by the amount of nondesorbable herbicide present in soil. Nondesorbable alachlor (as determined after methanol extraction) generally increased on a Waukegan silt loam (Typic Hapludolls) and a Ves clay loam (Udic Haplustolls) during five 0.01 M CaCl₂ desorptions. Atrazine was totally extracted with methanol from the Waukegan soil after one desorption using 0.01 M CaCl₂. However, after five desorptions with 0.01 M CaCl₂ an average of 5.5 and 15.5% of the total recovered atrazine from two atrazine application rates was methanol nondesorbable from the Waukegan and Ves soils, respectively. Freundlich desorption isotherms adjusted for nondesorbable herbicide accounted for as much as 71% of the difference between adsorption and desorption isotherms. Only a portion of the hysteresis observed can be attributable to nondesorbable herbicide.

Publication Title

Weed Science

Volume

38

Issue

1

First Page

74

Last Page

80

Format

application/pdf

Language

en

DOI of Published Version

10.1017/S0043174500056149

Publisher

Cambridge Core

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S.

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