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岡山 清司, 吉野 喬, 小々高 薫, 飯田 周治. "7-14 水田土壌における珪酸の可溶化(第4報) : 土壌溶液の溶存珪酸濃度に及ぼす可溶珪酸・固定力の影響(7.水田土壌の肥沃度)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 28.0 (1982) 107