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By: Oguma, KanType: ArticleIn: The journal of the College of Agriculture, Tohoku Imperial University, Sapporo, Japan = Tohoku Teikoku Daigaku Noka Daigaku kiyoVolume: 5Series:Issue:Date: 1913Page Range: 149--163Publication Info: Sapporo, Japan, The University, 1908-1917Subjects: