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Hyun-Kyung KANG
National Institute for Agro-Environment Sciences Sang Myung University, Korea
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Toshiya OHKURO
National Institute for Agro-Environment Sciences
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Seiko NIKKUNI
Faculty of Agriculture, Niigata University
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Tadao AODA
Faculty of Agriculture, Niigata University
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Hiroyuki ARITA
Faculty of Agriculture, Niigata University