Making-up and practical application of the clay mineralogical map of cultivated soils in Nagasaki prefecture [Japan]
1997
Egashira, K. (Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture) | Nakashima, S. | Isoda, M.
The clay mineralogical map of cultivated soils of Nagasaki prefecture was prepared based on the analytical data of the clay content and clay mineralogical composition of surface soils of paddy fields, upland fields, and lands under perennial crops throughout the prefecture. Following eight categories were used as mapping units: smectite-dominant, smectite-abundant, chlorite/mica/vermiculite/intergrade mineral-type(I), chlorite/mica/vermiculite/intergrade mineral-type(II), kaolin mineral-type(I), kaolin mineral-type(II), mixture of smectite-dominant, smectite-abundant, chlorite/mica/vermiculite/intergrade mineral-type(I) and kaolin mineral-type(I), and noncrystalline/layersilicate mineral-type. Clay mineralogical characteristics of 9 soil regions in Nagasaki prefecture were clearly indicated in the clay mineralogical map. The map was useful in the land use planning, soil management, manuring practice, prevention of environmental pollution, and prediction of landslide-prone area in respective regions
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