Summary
In sand-culture experiments in pots it was shown that various crops react to minute applications of iodide or iodate. The vegetative growth of spinach, white clover, fodderbeet, tomatoes, perennial ryegrass, turnips (aerial parts), barley, flax, wheat and mustard was favourably influenced by iodine. No distinctly positive effect was observed, however, with buckwheat. The development of oats and to a lesser extent of the roots of turnips was hindered at all the rates of application used.
In general, iodate had a more favourable effect on growth than iodide, particularly in the initial stages of development. This may be due partly to the fact that plants absorb iodate more slowly than iodide, since during early life plants are highly sensitive to an overdosage of iodine.
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Borst Pauwels, G.W.F.H. Iodine as a micronutrient for plants. Plant Soil 14, 377–392 (1961). https://doi.org/10.1007/BF01666295
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DOI: https://doi.org/10.1007/BF01666295