The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to delineate proper management of water and fertilizer to obtain maximum yield of Boro rice. Two levels of water management viz. (i) SRI water management (moist soil, water at field capacity) and (ii) BRRI water management (5-6cm standing water), and five fertilizer management practices viz. (i) BRRI fertilizer managements (120, 60, 40, 10, 5 kg N, P205, K20, S and Zn kg had, respectively), (ii) cowdung @ 10 t had, (iii) poultry manure @ 5 t had, (iv) 50% of BRRI recommended fertilizer + 50% of the cowdung, (v) 50% BRRI recommended fertilizer + 50% poultry manure were arranged in split-plot design with three replications. The results showed that SRI water management produced higher grain and straw yields than that of BRRI water management. Number of total tillers hill-1, bearing tillers hill-1, total spikelets panicle-1 and sterile spikelets panicle-1 gave similar trends to that of grain and straw yields. BRRI recommended fertilizer management produced the highest grain yield and the second highest grain yield was obtained in 50% of the BRRI recommended fertilizer + 50% of the poultry manure. The lowest grain yield was obtained in cowdung @ 10 t had. In terms of interaction, SRI water management in combination with BRRI fertilizer management produced the highest grain yield and the second highest grain yield was obtained in BRRI water management x BRRI fertilizer management and in SRI water management x 50% BRRI fertilizer management + 50% of the poultry manure. The lowest grain yield was found in BRRI water management x cowdung @ 10 t had.