The study area is located in the wetland basin area of Brahmanbaria district of Bangladesh under the Sylhet basin of Surma-Kusiyara alluvium. The four soil series studied to evaluate its agricultural potentialities were Balanganj, Phagu, Nasirnagar and Nabinagar. GPS have been used to locate the geographical position of the soil samples. Balaganj series is located at 24º06'494" N to 91º07'622" E in the medium highland phase. It is seasonally shallowly flooded, poorly drained soils developed in mixed textured alluvium occupying in the gently sloping ridges. These are mixed grey and dark brown, friable, silt loam to loam subsoil with strong to moderate subangular blocky structure and patchy to continuous grey cutans on ped faces. Phagu series located at 24º 05'572" N to 91º08'384" E in the slope of basin and is poorly drained, seasonally deeply flooded soils developed in the basins and basin margins of Surma-Kusiyara floodplain. These have a grey to dark grey, clay sub-soil usually with strong prismatic and angular blocky structure and continuous grey or dark grey cutans along the ped faces. Nasirnagar series is located at 24º05"914" to 91º06'643" E in the nearly level basin sites. It comprises seasonally very deeply flooded, very poorly drained, moderately fine textured soils developed in the Titas valley of the Sylhet basin. These have a dark grey to very dark grey, mottled brown, silty clay loam sub soil. Nabinagar series is located at 24º07'966" N to 91º08'161" E in the basin depressions. It comprises seasonally very deeply flooded, very poorly drained soils developed in fine textured alluvium on the Titas valley of the Sylhet basins. They have a very dark grey, silty clay to clay and A horizon with common brown mottles overlying a silt loam to silty clay loam oxidized substratum. The area under study forms a part of the-Bengal-basin filled with quaternary sediments. The materials of the surface area are of recent to sub-recent age and estimated to be of around 200 years according to an estimate. The lithology of the recent and sub recent alluvia dominated by silt and clay size particles. Soil samples were collected, air dried, grinded and screened through sieve. The samples were analyzed for pH, organic matter, N, P, K, Ca, Mg, S, B, Cu, Zn, Fe and Mn. pH of soils was determined at a soil-water ratio 1.0 : 2.5 using a pH meter and the organic carbon content of soils was determined volumetrically by wet oxidation method as described by Jackson. The total nitrogen in soils was determined by Kjeldahl’s method as described by Jackson. Available phosphorous was determined by Olsen method. Ammonium acetate extract was prepared and the exchangeable Ca, Mg, K were determined from the extracts. Available sulphur was determined by a spectrophotometer after developing turbidity with barium chloride. Boron was determined by Azomethine-H reagent buffer solution, Zn, Cu, Fe and Mn were extracted with DTPA solution. Soil physical attributes were assessed in the field using standard field methodology. Sylhet basin is a vast depressed area lying between the Surma-Kushiyara floodplain and the Old Brahmaputra floodplain. The relief comprises of high river levees surrounding extensive basins, the centres of which stay wet through the dry season. The whole area are subject to flash floods and most of the land are deeply or very deeply flooded in the monsoon season. The difference in the elevation between river banks and haor centres varies from five meters or more. Clays predominate in the basins, with peat in some basin centres. Surma-Kushiyara floodplain is formed by the sediments brought in by the rivers draining into the Meghna catchment area from the Northern and Eastern hills. It comprises alternate narrow long ridges and deep narrow inter-ridge depressions with some broad basins. The relief is generally smooth, comprising broad ridges and basins, but it is locally irregular along river channels. The study area has a pronounced tropical monsoon climate. Total annual rainfall is 2420 to 2430 mm. Excess of rainfall over evaporation during rainy season have been recorded in an estimate. There is plenty of rainfall during monsoon and most of this rainfall occurs during the months of May, June and July. The highest and lowest mean temperatures are 33.5 and 12.30C, respectively in the months of May to January. The summer begins at the end of March and merged with the rainy season which continues up to September. The main rivers in the study sites are the Meghna, The Dhaleswar, the Titas, the Bansi, the Baliaguri, the Pagla, the Saldah and the Buri. The Meghna river flows along the margin area. The Meghna is navigable throughtout the year. All other rivers are navigable during the rainy season only. The Titas taking off from the Meghna several kilometers north of Bhairab bazaar has meandered through the study area and finally has joined the Meghna again near Nabinagar Upazila several kilometers downstream of Bhairab bazaar. Several creeks during draining Tripura hills join the Titas river. Normally, the floodlevel of the Meghna river starts rising from May due to increased discharge of its tributaries and discharges are usually at their highest level from July to September; from November it starts receeding and finally touches lowest discharges in January-March. Creeks draining the Tripura hills swell rapidly and flows for a few days at a time after heavy pre-monsoon rainfall in its catchment areas i. e., Tripura hills. The Sylhet basin is subdivided into the Surma-Kusiayara floodplain and Titas floodplain because of its lower elevation receives run-off from the Tripura hills, neighbouring piedmont apron and adjoining Old Meghna estuarine floodplain as well as spillings from the Meghna river. In the rainy season, it becomes an enormous lake more than 12 feet deep. Deep flooding, sudden rise of flood level and current water prevent the cultivation of kharif crops in most of the area. However, boro rice is extensively grown because large areas remain wet for most or all of dry season.