Role of biofertilizers in relation to nitrogen levels on growth and yield of wheat (Triticum aestivum l.)

A field experiment was conducted during rabi seasons of 2005–06 and 2006–07 to find out the efficacy of biofertilizer in relation to nitrogen levels on growth, yield attributes, grain yield and economics of wheat. Treatments were consisted of four levels of biofertilizers (control, Azotobacter, Azospirillum in alone and both as combination) and four levels of nitrogen (125, 100, 75 and 50% N of recommended dose). The 16 treatments were tested in R. B. D. with three replications. Among the biofertilizers, combined use of Azotobacter+Azospirillum gave superior growth, yield attributes, grain yield, net income and B: C ratio followed by Azotobacter and Azospirillum as alone, but the lowest was in control. While in case of nitrogen levels, better growth, yield attributes, grain yield, net income and B: C ratio were obtained in75% N of R. D., followed by 100 and 125% but minimum was in 50%. It was also noted that combined application of biofertilizer with 75% N of R. D. proved to be better in both the years.