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長谷川 進, 野村 琥. "5-4 十勝地方における大豆栽培の土壌肥料学的研究(第2報) : 窒素の供給時期の差異が生育・収量に及ぼす影響(5.植物の無機栄養および養分吸収)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 24.0 (1978) 56