Central Potato Research Institute, Shimla, 171 001, (HP).
Field experiments during 2000 at Shimla for assessing the utility of growth promoting bacteria, Azotobacter & Vermicompost for potato production indicated that Bacillus cerus (A) and Bacillus subtilis (B) separately increased the tuber yield of potato from 115 to 268 q/ha and was at par with 100% NPK treatment. Vermicompost @ 5 t/ha increased the tuber yield by 34 to 65 q/ha. The increase in yield was more when optimum NPK dose of fertilizer was applied. Inoculation of seed tubers with Azotobacter in the absence of N increased the tuber yield by 68 q/ha and the effect of Azotobacter decreased gradually as the dose of N was increased.
