洪積層土壌の化学的性質(第1報)

概要

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In this paper the authors investigated the chemical properties of the allitic soils. The results were summarized as follows. (1) The SETA soils; The uncultivated soils have higher acidity than the cultivated soils. The cultivated top-soil has still a negative charge at pH 3.5,and the pH-ζ curve has the remarkable min-value. The min-value of pH-ζ curve on the cultivated top-soils is more eminent than that on the uncultivated top-soils. The pH-ζ curves have not the min-value on either of subsoils. The amount of soluble aluminium in the cultivated soils is smaller than that in the uncultivated soils at same pH. (2) The TAIZANJINO soils; The cultivated and uncultivated top-soils haven't the min-value of negative charge in pH-ζ curve, as a result of the rotted materials seem to be much accumulated under the condition of cold weather and the amount of calcium is lack. It seems that these subsoils have the properties of top-soil, owing to the calcium removed from top-soil to the subsoil. (3) Thus we should think, through the maturity of one's own process, these two uncultivated soils turn into what of alike properties.
1953-10-01