Effect of Azorhizobium and vam inoculation on fertilizer economy and yield of maize (Zea mays L.).

A field experiment was conducted in 2005–06 on maize variety PMH-1 with dual inoculation of Azorhizobium and VAM (Glomus fasciculatum) along with application of formononetin. The seeds inoculated with Azorhizobium and VAM and treated with formononetin showed positive interactions for germination, percent mycorrhizal infection, N and P contents, total chlorophyll and other growth parameters as compared to control. Azorhizobium +VAM + formononetin treatment increased nitrogenase activity of treated plant roots. A 22.1 per cent increase in grain yield over control was observed by the dual inoculation and formononetin treatment.