In order to investigate the effect of vermicompost and biofertilizers on yield and yield components of common millet, an experiment was carried out in split-factorial in randomized complete block design with four replications. The main plots were two levels of vermicompost, and sub plots were a factorial combination of incubation with mycorrhiza and Azotobacter. The results showed that incubation of G. intraradices significantly increased the 100- grains weight and biological yield, while incubation of G. mosseae not increased these yield components in comparison with control. 100-grains weight of plants that incubated with A. chroococcum significantly higher than those not incubated with A. chroococcum. In addition, effect of mycorrhiza and Azotobacter in presence of vermicompost was greater. In addition, biological yield was higher when mycorrhiza applied along with Azotobacter and vermicompost. Grain yield of plants that incubated with A. chroococcum significantly higher than those not incubated with A. chroococcum. Also, effect of Azotobacter in presence of vermicompost was greater. The highest and the lowest harvest index were observed in control and vermicompost + Azotobacter treatments, respectively. Colonization of G. intraradices and G. mosseae showed different response to presence of vermicompost. G. intraradices showed higher colonization when applied along with vermicompost, while G. mosseae was not influenced by vermicompost levels. Colonization of G. intraradices and G. mosseae were higher in presence of Azotobacter.
