The field experiments was conducted at the Instructional Farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Coochbehar, West Bengal, India during 2011-2012. The objective was to assess the effect of chemical free bio-accelerated and conventional farming system on growth, yield attributes, yield, nutrients uptake, quality and microbial population of green gram. The farm is situated at 26 o 19'86"N latitude and 89 o 23'53"E longitude at an elevation of 43.0 m above mean sea level. Results revealed that the growths, yield attributes, quality and microbial population of green gram were recorded higher in chemical free bio-accelerated compared to the conventional farming system. From the pooled data the highest yield was recorded under bio-accelerated farming (1500 kg ha-1) compared to the conventional farming system (1375 kg ha-1). The highest moisture percentage recorded under conventional farming (65.37%) than bio-accelerated farming system (63.35%). The nitrogen (50.40 and 73.88 kg ha-1), phosphorus (10.53 and 11.32 kg ha-1) and potassium (67.68 and 123.60 kg ha-1) uptake by crop was recorded highest under the conventional farming compared to bio-accelerated farming system. The application jiwanmrita recorded significantly higher number of microbial population in the soil of bio-accelerated farming than the conventional farming system. From the pooled data analysis showed 62.50 microbes in bio-accelerated and 39.75 microbes in conventional farming before sowing which increased up to 97.25 microbes and decreased to 31.94 microbes in bio-accelerated and Conventional farming system. Among the chemical free bio-accelerated farming system pest incidence was found to be lower as compared to the conventional farming system.

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