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山田 寧直, 島 武男, 平山 裕介. "2 細粒質灰色低地土の牛ふん堆肥連用畑における窒素の動態 : 第1報 堆肥連用4~5年日の窒素の収支(九州支部講演会,2014年度各支部会)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 61.0 (2015) 287