CLAY MINERALOGICAL COMPOSITION OF VIETNAM SOILS DERIVED FROM DIFFERENT PARENT ROCKS
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概要
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Clay mineralogy of Vietnam soils was examined. Surface soils were collected from agricultural land at the sites different in parent rocks in four out of seven agro-economic zones. The soils derived from alluvium and sandstone were light clay, clay loam or sandy clay loam in texture, and the clay fraction was composed of mica and kaolinite with or without chlorite. In addition, the mica/vermiculite/smectite mixed-layer mineral was found in the soils collected from the Red River Delta region, while vermiculite-chlorite intergrade was detected in the soils collected in the North Midland and Mountainous region. The soils derived from limestone were of heavy-clay texture, and the clay fraction consisted predominantly of kaolinite. The soils derived from basalt were of heavy-clay texture, and the clay mineralogical composition was different with relief. The clay fraction of Ferralsols on the hillside was composed of kaolinite, whereas that of Luvisols on the terrace comprised smectite and halloysite(7Å).
- 日本粘土学会の論文
著者
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Tra H
Laboratory Of Soil Science Department Of Agricultural Chemistry Division Of Agriculture Kyushu Unive
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Tra Ho
Laboratory Of Soil Science Department Of Agricultural Chemistry Division Of Agriculture
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EGASHIRA Kazuhiko
Laboratory of Soil Science, Division of Soil Science and Plant Production, Department of Plant Resou
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THANH NGUYEN
Department of Agrochemistry and Soil Science, Faculty of Land and Water Resources Management, Hanoi
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Thanh Nguyen
Department Of Agrochemistry And Soil Science Faculty Of Land And Water Resources Management Hanoi Ag
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Egashira Kazuhiko
Laboratory Of Soil Science Department Of Plant Resources Faculty Of Agriculture Kyushu University
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