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Toshimi KUSUME
Hokkaido Central Agricultural Experiment Station Hokkaido Green-Bio lnstitute
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Tetsuo TAMADA
Hokkaido Central Agricultural Experiment Station Research Institute for Bioresources, Okayama University
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Hiroshi HATTORI
Hokkaido Central Agricultural Experiment Station
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Toshio TSUCHIYA
Hokkaido Central Agricultural Experiment Station
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Katsuteru KUBO
Usu Agricultural Extension Center
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Hideo ABE
Hokkaido Prefectural Donan Agricultural Experiment Station
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Shigetou NAMBA
Graduate School of Agricultural and Life Sciences, the University of Tokyo
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Tsuneo TSUCHIZAKI
Koibuchi College of Agriculture
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Kunihei KISHI
Tachikawa College of Tokyo
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Satoshi KASHIWAZAKI
National Agriculture Research Center