The experiments were conducted at farmers’ field of Tukerbazer, Sylhet in T. aman season 2011 and Boro season 2012. Eight treatment combinations were tested in T. aman season viz. T1= Control, T2= Agro-Sar Organic (ASO) @ 750 kg ha-1, T3= STB (Soil Test Based), T4= T2+50% STB, T5= T2+ 60% STB, T6= T2+ 70% STB, T7= T2+ 80% STB and T8= T2+ T3. The experiment was laid out in a randomized complete block design with three replications having unit plot size of 4 m × 3 m. Fertilizer doses on STB were 93 kg N, 17 kg P, 36 kg K and 13 kg S ha-1 and was applied as urea, TSP, MoP and gypsum, respectively. BRRI dhan31 was used as test crop. Thirty day old 2-3 seedling hill-1 were transplanted with 20 cm × 20 cm spacing. Ten treatment combinations were tested in Boro season viz. T1= Fertilizer Recommendation Guide (FRG) 2005 dose: NPKSZn @ 123, 26, 60, 13 & 4 kg ha-1, T2= Agro meal plus @ 300 kg ha-1, T3= T2+ N, P, K, S @ 74, 16, 60 and 8 kg ha-1, T4= ASO @ 740 kg ha-1, T5= T4+ NPKS @ 74, 16, 60 and 8 kg ha-1, T6= Agro-Sar (Organo-chemical) (ASOC) @ 740 kg ha-1, T7= T6+ NPKS @ 74, 18, 36 and 8, T8= Raj Jaibo Sar @ 790 kg ha-1, T9 = T8+ NPKS @ 74, 20, 54 and 9 kg ha-1, and T10= Control (No fertilizer). Raj Jaibo Sar is a organic fertilizer. The experiment was laid out in a randomized complete block design with three replications having unit plot size of 5 m × 4 m. BRRI dhan29 was used as test crop. Forty days old 2-3 seedling hill-1 were transplanted with 20 cm × 20 cm spacing. Soil texture,pH, organic matter, available P and S, exchangeable K, Na, Ca and Mg were determined following standard methods (Black, 1965; Jackson, 1962; Walkley and Black, 1935; Olsen et al., 1954 and Pageet al., 1982). For both experiments TSP, MoP, Gypsum, and Agro-Sar were applied at final land preparation. Urea was applied into three equal splits, 1/3 basal, 1/3rd maximum tillering stage and the remaining 1/3rd at panicle initiation stage. Necessary intercultural operations were done as and when required. At maturity, the crop was harvested from 5 m2 area for grain and straw yield and grain yield was adjusted to 14% moisture content. The plant height, tiller no., panicle no., sterile spikelet and filled grain production, grain and straw yield were recorded. Finally economic analyses were done for net benefit and marginal rate of return.