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渡辺 祐志, 上野 達, 山神 正弘, 東田 修司. "20-26 土壌窒素診断に基づいた秋まきコムギの窒素施肥(20.肥料および施肥法)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 45.0 (1999) 219