Affiliation: | 1. Faculty of Agriculture, Niigata University, 2-8050 Igarashi, Niigata, 950-2181, Japan 2. Department of Agro-Environmental Science, Takushoku University, Hokkaido Junior College, 4558 Menu, Fukagawa, 074-8585, Japan 3. Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, 020-8550, Japan 4. Niigata Agricultural Research Institute, 857 Nagakura, Nagaoka, 940-0826, Japan
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