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The numbers of culturable diazotrophic endophytic bacteria (CDEB) from roots, stems and leaves of sugarcane submitted to organic, inorganic or no fertilization were compared. In order to determine the size of the N 2 fixing populations, the Most Probable Number technique (MPN) was used. The quantification of diazotrophic bacteria by using the acetylene reduction assay (ARA) was more accurate...
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