Soares, B.L. Ferreira, P.A.A. Oliveira-Longatti, S.M. de Marra, L.M. Rufini, M. Andrade, M.J.B. de Moreira, F.M. de S. Cowpea symbiotic efficiency, pH and aluminum tolerance in nitrogen-fixing bacteria Subjects--Topical Terms: FEIJÃO DE CORDARHIZOBIUMFIXAÇÃO DE NITROGENIO