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Comparison of Different Soil Leaching Techniques with Four Herbicides

Published online by Cambridge University Press:  12 June 2017

Chu-Huang Wu  and
P. W. Santelmann
Chu-Huang Wu
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74074
P. W. Santelmann
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74074
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Abstract

Herbicide mobility in soils was compared by three laboratory methods. The Rf values calculated from soil thin-layer chromatography correlated closely with those obtained from soil thick-layer chromatography (r = 0.96). Herbicides leached slightly further in slotted column chromatography as compared with the other methods. The working hours required to conduct a study with each method were in the increasing order of thin-layer, thick-layer, and column chromatography. However, the thin-layer method required the longest waiting times, followed by the column and thick-layer chromatography. If radioactive herbicides are not available or obtainable, the thick-layer chromatography is simplest and quickest. The relative mobility of herbicides studied was fluometuron [1,1-dimethyl-3-(α,α,α-trifluoro-m-tolyl)urea] > napropamide [2-(α-naphthoxy)-N,N-diethylpropionamide] > terbutryn [2-(tert-butyl-amino)-4-(ethylamino)-6-(methylthio)-s-triazine] > trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine). Less herbicide mobility was observed in heavier soil than in sandy soil.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 6 , November 1975 , pp. 508 - 511
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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