The strain BR 3351 was isolated from cowpea (Vigna unguiculata) nodules cultivated in soil from Amazon Rain Forest of Brazil. The strain was described as Bradyrhizobium manausense.
The strain BR 3262 was isolated from cowpea (Vigna unguiculata) nodules cultivated in soil from Atlantic Forest Region of Brazil. The strain is efficient for cowpea biological nitrogen fixation and is