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By: Niisima, YType: ArticleIn: The journal of the College of Agriculture, Tohoku Imperial University, Sapporo, Japan = Tohoku Teikoku Daigaku Noka Daigaku kiyoVolume: 3Series:Issue:Date: 1909Page Range: 109--179Publication Info: Sapporo, Japan, The University, 1908-1917Subjects: