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The purpose of this study is estimating the foliage biomass in a natural deciduous broad-leaved forest area dominated by Siebold's beech (Fagus crenata Blume) from topographical factors using a geographic information system (GIS). The study was carried out in Kamikawa Village, Niigata Prefecture in central Japan. First, 23 plots were selected in the area and four litter traps were set in each plot...
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