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李 香珍, 谷 昌幸, 高井 章弘, 大舘 あき子, 梅津 一孝, 倉持 勝久. "27 牛糞尿の堆肥化に伴う腐植物質の光学的特性の変化(北海道支部講演会, 2005年度各支部会講演要旨)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 52.0 (2006) 239