A field experiment was conducted at the farm of Agricultural Training Institute (ATI), Khadim Nagar, Sylhet during kharif-1 season from April to August in 2014 to seethe effect of cowdung, NPK and Rhizobium inocula on growth, nodules number and yield of summer mungbean (var. Binamoog-8) in acid soil. The experiment was composed of seven treatments viz. T1= Control (without Rhizobiuminocula and fertilizers), T2 =Cowdung (CD), T3 =CD+RI, T4 = NPK, T5 = NPK+RI, T6 = 1/2(NPK)+RI and T7 = Rhizobium inocula (RI). The experiment was laid out in a randomized complete block design (RCBD) with three replications. The nutrients N, P and K were applied @ 14, 14 and 17.5 kg ha-1 from the sources of urea, TSP and MP, respectively; CD was applied @ 8 t ha-1 and RI was applied @ 45 g kg-1, as seedinoculant. The data on growth, yield and yield contributing parameters were collected at different intervals of mungbean plant from 30 days after sowing to until final harvest at 15 days interval. The initial and post-harvest soils were collected and analyzed. The treatments had significant effects on all the growth, yield and yield parameters of mungbean at different sampling dates.