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*Keisuke Obase
Graduate school of agriculture, Hokkaido university
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Yutaka Tamai
Graduate school of agriculture, Hokkaido university
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Takashi Yajima
Graduate school of agriculture, Hokkaido university
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Toshizumi Miyamoto
Graduate school of agriculture, Hokkaido university
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Adikari Yoganath
Graduate school of agriculture, Hokkaido university