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Soil Science Society of America Journal Abstract -

Influence of Water Flux and Porous Material on the Movement of Selected Herbicides1


This article in SSSAJ

  1. Vol. 32 No. 5, p. 629-633
    Received: Dec 14, 1967
    Accepted: June 3, 1968

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  1. J. M. Davidson,
  2. C. E. Rieck and
  3. P. W. Santelmann2



The rate at which two substituted urea herbicides move through a water-saturated glass bead and uniformly packed soil column depends upon the water flux or average pore velocity. A 200-ml slug of 0.01N CaSO4 solution containing either fluometuron (3-(m-trifluoromethylphenyl)-1,1-dimethylurea) or diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) was introduced at one end of a 30-cm long column at a specific flux and the herbicide displaced through a column with 0.01N CaSO4 at the same water flux. Effluent samples collected every 5-ml show fluometuron and the chloride ion to mix in a similar manner at the two fluxes studied. Experimental and calculated effluent concentration distributions did not agree when fluometuron was retained by the porous material.

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