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By: Lima, Ana Lúcia da Silva - Zanella, Fábio - Schiavinato, Marlene Aparecida - Haddad, Célio F. B.Type: ArticleIn: Acta Botanica BrasilicaVolume:Series:Issue:Date: 2006-09-01Page Range:Publication Info:Subjects: leaf life span nitrogen fixation nitrogen resorption efficiency nitrogen resorption proficiency nitrogen-use efficiency