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Taketo OBITSU
Faculty of Agriculture, Hokkaido University
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Toshio MOROOKA
Faculty of Agriculture, Hokkaido University
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Seiji KONDO
Faculty of Agriculture, Hokkaido University
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Junjiro SEKINE
Faculty of Agriculture, Hokkaido University
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Masahiko OKUBO
Faculty of Agriculture, Hokkaido University
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Yasushi ASAHIDA
Faculty of Agriculture, Hokkaido University