The research work was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh. The experimental field belongs to the non-calcareous dark grey floodplain soil under the Agro-ecological Zone of the Old Brahmaputra Floodplain (AEZ-9) (UNDP and FAO, 1988) located at 24.75° N latitude and 90.50°E longitude at an elevation of 18 m above the sea level. The field was a medium high land with flat and well drained condition with the pH value, organic matter, total nitrogen, available phosphorus (P2O5) and potassium of the soil ranged from 5.9-6.5, 0.93%, 0.13%, 16.3 ppm and 0.28%, respectively (Rahman, 2018). The experiment consists of two factors; Factor A: rice cultivars viz. BRRI dhan34, BINAdhan13 and Kalizira; Factor B: nutrient management viz. Control (no application of manures and fertilizers), recommended dose of inorganic fertilizer (i.e. 150, 95, 70, 60, 12 kg ha-1 of Urea, TSP, MoP, Gypsum, Zinc Sulphate, respectively) (FRG, 2012), vermicompost (i.e. Organic carbon 11.4-13.5%, Nitrogen 0.84-1.58%, Phosphorous 0.56-1.51%, potassium 0.80-0.90%, Sulfur 0.52-0.55%, Zinc 0.01%, Calcium 0.68-0.72%) @ 3 t ha-1, 25% less than recommended dose of inorganic fertilizer vermicompost @ 1.5 t ha-1, 50 % less than recommended dose of inorganic fertilizer + vermicompost @ 3 t ha-1. The experiment was laid out in randomized complete block design with three replications. The size of the unit plot was 10 m2 (4 m × 2.5 m). The sprouted seeds were sown in the nursery bed on 10 July 2017. The main field was prepared by power tiller with three times ploughing and cross ploughing followed by laddering. The land was fertilized as per treatment specifications. The whole amount of manures and triple superphosphate, muriate of potash, gypsum and zinc sulphate were applied at final land preparation as per treatment. Urea was applied in three equal splits at 15, 30 and 45 days after transplanting (DAT). The seedlings were uprooted and immediately transferred to the main field on 10 August, 2017. Seedlings were transplanted at the rate of three seedlings hill-1, maintaining a spacing of 25 cm× 15 cm. Intercultural operations were done as and when necessary. When 80-90% of the panicles turned into golden yellow color, the crop was assessed to attain maturity. Five hills (excluding border hills and central 2.0 m × 2.5 m harvest area) were selected randomly from each unit plot for recording data. An area of central 2.0 m × 2.5 m was selected from each plot to record the yield of grain and straw. The three varieties were harvested at different dates. Harvesting of BRRI dhan34, Binadhan-13 and Kalizira were done on 10 December, 23 December and 31 December 2017, respectively. Grains were then sun dried at 14% moisture level and cleaned. The straw was also sun dried properly. Finally, the yield of grain and straw plot-1 were recorded and converted to t ha-1. Data were collected on plant height (cm), number of total tillers plant-1, number of effective tillers plant-1, panicle length (cm), number of grains panicle-1, number of sterile spikelets panicle-1, 1000-grain weight (g), grain yield (t ha-1), straw yield (t ha-1), harvest index (%). The collected data were compiled and tabulated in proper from and subjected to statistical analysis. Data were analyzed using the analysis of variance technique with the help of computer package program MSTAT-C and mean differences were adjudged by Duncan’s Multiple Range Test (DMRT) (Gomez and Gomez, 1984).