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湯本 利信, 松尾 英俊. "3E・2 水田土壌の生産力に関する研究 : 土壌水中の珪酸について(予報)(土壌肥沃度(水田土壌の肥沃度))." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 10.0 (1964) 117