Abstract
SOIL, climate, time of sampling and other factors influence the mineral composition of plants, and the same species can contain a wide range of inorganic ions. In spite of these variations several workers1–3, using different plants, claimed that the sum of the cations (expressed in m.equiv./100 g dry material) of a particular plant is constant. McCalla and Woodford4 found that the ratio of total cations : total anions in wheat was constant and later Bear5 showed that, for lucerne, at any pH when ions were expressed in m.equiv./100 g: It is not known if silicon should be included, and Dijkshoorn6, using perennial ryegrass, obtained a constant = 0.5 when silicon was omitted.
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References
Van Italie, Th. B., Soil Sci., 46, 175 (1938).
Wallace, A., Toth, S. J., and Bear, F. E., J. Amer. Soc. Agron., 40, 80 (1948).
Woodbridge, C. G., Canad. J. Agric. Sci., 35, 350 (1955).
McCalla, A. G., and Woodford, E. K., Plant Physiol., 13, 695 (1938).
Bear, F. E., Agron. J., 42, 176 (1950).
Dijkshoorn, W., Neth. J. Agric. Sci., 5, 81 (1957).
Iler, R. K., The Colloid Chemistry of Silica and Silicates, 11 (Cornell Univ. Press, Ithaca, New York, 1955).
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CUNNINGHAM, R. Cation–Anion Relationships in Italian Ryegrass (Lolium multiflorum). Nature 196, 1230–1231 (1962). https://doi.org/10.1038/1961230a0
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DOI: https://doi.org/10.1038/1961230a0
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