Characterization of Red and/or Yellow Colored Soil Materials in the Southwestern Part of Japan in Terms of Lithology and Degree of Weathering
Open Access
- 1 September 1985
- journal article
- research article
- Published by Taylor & Francis Ltd in Soil Science and Plant Nutrition
- Vol. 31 (3), 403-410
- https://doi.org/10.1080/00380768.1985.10557447
Abstract
Based on chemical and mechanical compositions and quartz content of red and/or yellow colored soil materials in the southwestern part of Japan, lithology index (LI) and weathering index (WI) were derived using a multivariate statistical method (factor analysis). The variables used for factor analysis are Fe2O3/Al2O3, TiO2/Al2O3, Fe2O3+Al2O3+Quartz, Si(non-quartz)/(Fe2O3 + Al2O3), CaO + MgO + K2O3, MgO/K2O3 and Quartz/Sand, all of which represent certain different aspects of weathering and/or Iithological characteristics. Since LI and WI are mutually independent, it is possible to evaluate the effect of the degree of weathering on the characteristics of red and/or yellow colored soil materials independently from that of lithology.Keywords
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