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On the basis of the findings of the present investigation conducted during rabi season of the year 2002–03 and 2003–04, it is concluded that application of 75% RDF fertilizers, 25 t/ha. FYM & Azotobacter + PSB innoculation proved best in respect of B:C ratio. The results of the present investigation clearly reveal that about 25% nutrient required by onion crop could be supplemented by making effective combination of chemical fertilizers with FYM and biofertilizer.