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A field experiment was conducted on rice seed production in rice-wheat cropping system to find out the effect of application of biofertilizers and urea on the grain yield and quality attributes of rice varieties at the research farm of Indian Agricultural Research Institute, New Delhi, India during 2 wet seasons of 2006-08. The experimental treatments included three rice varieties, viz.’Pusa 44’,’Pusa Basmati 1’and’Pusa 1121’and six nutrient management practices, viz. T1: Absolute control (NOP0 KO); T2: Recommended dose of nitrogenous fertilizer (N120); T3: 75% of recommended dose of nitrogen; T4: 75% of recommended dose of nitrogen+ Azolla@ 1.0 t/ha; T5: 75% of recommended dose of nitrogen+ Blue Green Algae@ 2 kg/ha and T6: 75% of recommended dose of nitrogen+ Blue Green Algae@ 2 kg/ha+ Azolla@ 1.0 t/ha. In addition to these treatments, standard recommended dose of P and K were applied to all …