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Present investigation was carried out to study the effects of fertilizer application and soil test values on yield and nutrient status in garlic crop and to generate information for targeted yield and maximum economic yield. The field experiments were conducted at the research farm of Jawahar Lal Nehru Krishi Vishwa Vidyalaya, Jabalpur during 2009-10. Inductive methodology was followed in which fertility gradients were created and garlic (var. G-323) was grown with varied levels of fertilizers (NoPoKo, N;PIK) and N2P2K2, where N,PIK; represents 150, 150, 60 kg ha1 of N, P2Os and K2O respectively). The initial nutrient status and nutrient availability after harvest of crop was determined. The nutrient concentration and uptake were computed at harvest. These values were used to derive the nutrient requirement and targeted yield equation for garlic crop. The results of the present investigation revealed that, for production of one quintal of garlic bulb requires 2.23 kg N, 0.87 kg P and 2.02 kg K. The nutrient utilization efficiency of N, P and K from soil source was found 12, 66 and 26 percent respectively whereas the per cent utilization of primary nutrient applied through fertilizer was found 41, 36 and 51 percent for N, P and K, respectively. The fertilizers adjustment equations were derived for N, P and K with and without manure for garlic crop to achieve the targeted yield.
Key words: Target Yield, nutrient use efficiency, nutrient requirement, fertilizer adjustment equation