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Shigehiro Ishizuka
Department of forest soils, Forestry and Forest Products Research Institute
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Naoyuki Yamashita
Department of forest soils, Forestry and Forest Products Research Institute
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Nagaharu Tanaka
Department of forest soils, Forestry and Forest Products Research Institute
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Kazuhito Morisada
Department of forest soils, Forestry and Forest Products Research Institute
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Kimihiro Kida
Department of forest soils, Forestry and Forest Products Research Institute Present Address: Tohoku Research Center, Forestry and Forest Products Research Institute