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*akira sakuma
Department of Agriculture, Hokkaido Univ.
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makoto watanabe
Research Faculty of Agriculture, Hokkaido Univ.
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tadashi watanabe
Department of Planning and Finance, Teshikaga Town Office
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ayumu wakamatsu
Department of Planning and Finance, Teshikaga Town Office
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hideyuki saito
Research Faculty of Agriculture, Hokkaido Univ.
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masato shibuya
Research Faculty of Agriculture, Hokkaido Univ.
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takayoshi koike
Research Faculty of Agriculture, Hokkaido Univ.