Bacteria MIC MBC Rhizobium A1 1 ppm 8 ppm Rhizobium A3 1 ppm 8 ppm Azotobacter PHB+ 1 ppm 8 ppm E.coli 2 ppm  8 ppm

Table 2: MIC and MBC assay of Ag NPs on different strains of Rhizobium, Azotobacter and E.coli.