Summary
The uptake of five herbicides by the dead roots of six plant species was investigated and it is concluded that the process involved was probably adsorption. The adsorptive capacity of the dry matter of roots was lower than soil organic matter but was of a similar order of magnitude. It is suggested that in some cases adsorption might provide a significant pathway by which herbicides are taken up by the living plant. It seems unlikely that adsorption by roots will normally exert much influence on the herbicide concentration in the soil solution.
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Tames, R.S., Hance, R.J. The adsorption of herbicides by roots. Plant Soil 30, 221–226 (1969). https://doi.org/10.1007/BF01349511
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DOI: https://doi.org/10.1007/BF01349511