GENESIS OF SOILS DERIVED FROM VARIOUS TYPES OF PARENT ROCK IN SOUTHWESTERN JAPAN : I. Morphological and General Characteristics
スポンサーリンク
概要
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Twelve soil profiles, derived from various types of parent rock and developed under the forest vegetation in the southwestern part of Japan, were selected for the study. Macro- and micro-morphological and general physico-chemical characteristics were investigated. Although the presence of a clay skin as the symptom of clay illuviation was not evident in most of the soil profiles from the field observations, many soils showed an increase in clay content in the B horizon. The ratio of fine clay to total clay was significantly larger in the B horizon than in the A horizon. In addition, oriented clay occupying 1% or more of the cross sectional area was observed in the B horizon of many soils based on the micromorphological study. Thus, some of the clay-enriched B horizons could be qualified as "argillic," while some others occurred through both in situ clay formation in the course of weathering and the addition of younger material to the surface. According to the system of U. S. Soil Taxonomy, the six soils, half of the total number of the soils examined, which showed an argillic horizon, were classified into Ultisols or Alfisols.
- 社団法人日本土壌肥料学会の論文
著者
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Kyuma Kazutaka
Faculty Of Agriculture And The Center For African Area Studies Kyoto University
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MIURA Kenzo
Faculty of Agriculture and The Center for African Area Studies, Kyoto University
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ARAKI Shigeru
Faculty of Agriculture and The Center for African Area Studies, Kyoto University
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Miura Kenzo
Faculty Of Agriculture And The Center For African Area Studies Kyoto University
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Araki Shigeru
Faculty Of Agriculture And The Center For African Area Studies Kyoto University
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