An experiment was set up at the research farm of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Banglaadesh during the period of August 2013 to January 2014 to find out the efficacy of liquid fertilization (Magic Growth) on the performance of Kataribhog rice and to calculate how much urea can be saved without the reduction of grain yield. The experiment was accommodated with the split plot design with two levels of liquid fertilization viz., no liquid fertilization (Lo), Liquid fertilization with Magic Growth applied at 30, 45 and 60 DAT (L1), and four levels of nitrogen fertilizer viz., no nitrogen fertilizer (N0), 50% recommended nitrogen fertilizer (N50), 75% recommended nitrogen fertilizer (N75) and 100% recommended fertilizer (N100 ). The liquid fertilizer and nitrogen fertilizer doses were assigned to the main plot and sub-plot, respectively. Liquid fertilization (L1) treatment provided greater grain yield compared to no liquid fertilization treatment (L0) in all nitrogen levels. Furthermore, with the increment of nitrogen level the grain yield was increased up to N100 compared to no liquid fertilization treatment (L0), but in the application of liquid fertilization treatment (L1), grain yield was increased up to N75 and thereafter decreased in N100dose application. Moreover, Liquid fertilization with Magic Growth along with 75% of the recommended nitrogen fertilizer increased 10.5% grain yield with a saving of 25% of the recommended nitrogen fertilizer compared to recommended practice.
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