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  1. By: Alfaia, Sônia Sena.
    Type: Article
    In: Instituto Nacional de Pesquisas da Amazônia
    Date: 1997-06-01
    Publication Info: Instituto Nacional de Pesquisas da Amazônia
    Subjects: Amazônia Central  caupi (Vigna unguiculata L.)  latossolo amarelo  Nitrogênio 15