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Yuka OTSUKA
Graduate School of Agriculture, Hokkaido University
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Yoko WATANABE
Hokkaido University Forests, FSC, Hokkaido University
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Tomizo FUKUI
Hokkaido University Forests, FSC, Hokkaido University
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Haruhiro MAMIYA
Hokkaido University Forests, FSC, Hokkaido University
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Eishi FUJITO
Hokkaido University Forests, FSC, Hokkaido University
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Tsutom HIURA
Hokkaido University Forests, FSC, Hokkaido University
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Takayoshi KOIKE
Research Faculty of Agriculture, Hokkaido University