The supplementation effect of chemical fertilizers with biofertilizers for knolkhol crop var. G-40 was carried out under field conditions at Vegetable Experimental Farm, SKUAST-Jammu during autumn and winter season of 2007. The experiment comprised of seven treatments including control. The increased knob diameter, weight and corresponding yield were recorded for the plots receiving seedling dip in Azotobacter culture, soil application with mycorrhiza strain Glomus clarum and poultry manure with superiority over control by 98,40 and 40 percent respectively. The seasonal results indicated that the treatments of biofertilizers, mycorrhiza and organic manures were ineffective in mid-winter season when temperatures were severely low. However, treatments receiving Azotobacter showed significantly positive effect on growth rate irrespective of season. Thus, the application of Azotobacter as seedling treatment to the plants was found best for getting higher yield and earliness which is prerequisite for high intensity cropping system.
Biofertilizers, INM, Knolkhol
