Abstract
THE translation from Russian into English of a series of pioneering papers by K. K. Gedroiz was in a large measure responsible for focusing attention on the importance of the cation exchange process and the colloidal complex in the interpretation of the properties of soils. A German translation has now appeared of an important paper in which Gedroiz surveys the more recent work, especially in the U.S. Bureau of Soils, the Sudan, and Russia, on the composition and properties of the inorganic colloidal matter of soils, and then attempts to build up a system of soil classification based on the chemical composition of the adsorbing complex. In the present stage of our ignorance of the nature of the soil organic matter, Gedroiz restricts himself to the inorganic colloidal matter. He raises doubts as to the wisdom of the present tendency to identify this colloidal matter with the clay of mechanical analyses, and would prefer to use 0.25μ as the upper limit for particle size of colloidal clay instead of 2μ.
Der adsorbierende Bodenkomplex: und die adsorbierten Bodenkationen als Grundlage der genetischen Bodenklassifikation.
Prof. K. K. Gedroiz. Nach der 2 Auflage des Originals aus dem Russischen übersetzt von H. Kuron. (Sonderausgabe aus den Kolloidchemischen Beiheften, herausgegeben von Prof. Dr. Wo. Ostwald.) Pp. viii + 112. (Dresden und Leipzig: Theodor Steinkopff, 1929.) 5 gold marks.
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Der adsorbierende Bodenkomplex: und die adsorbierten Bodenkationen als Grundlage der genetischen Bodenklassifikation . Nature 126, 803 (1930). https://doi.org/10.1038/126803a0
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DOI: https://doi.org/10.1038/126803a0