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On account of evaluating and mapping the spatial distribution of some selected physicochemical attributes of soil including the percentage of sand, silt and clay, textural class, soil reaction (pH), electrical conductivity (EC), and organic matter contents over a period of last 20 years, an investigation was carried out at cyclone-afflicted Shyamnagar sub-district, Satkhira, Bangladesh. Particle size analysis was examined by following the hydrometer method, whereas pH and EC were determined instrumentally. The carbon content of the soils was examined volumetrically by the wet-oxidation method. The amount of sand was less than the silt and clay fractions in the studied sites. Silt contents were significantly increased for over 20 years. Consequently, siltation has been taken place for the last two decades. Soil salinity was associated with the development of silt texture, altered from clay loam texture. The field moisture contents were observed to be increased (52%) which attributed to the increase of clay content with depth. Investigation revealed a very slow to moderate soil permeability class. An incremental trend (4.55% to 27.27%) of pH and EC (12.25 to 46.40 mS/cm) was noticed in the present study in contrast to the study of 1996.  Alongside, corresponding spatial variability maps of the selected chemical soil properties were plotted by applying the Inverse distance weighting (IDW) interpolation method. Results demonstrated the southern, southeastern, and southwestern corners of the study area were experienced greater clay content, alkalinity, and significant depletion of organic matter. This situation might become worsened in near future. Moreover, the adoption of several effective countermeasures should be taken in this cyclone-affected soil to alleviate the soil salinity, improve soil health, and thereby deal with a more variable climate.

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The use of bricks in construction work is increasing in Bangladesh is increasing day by day. Pabna is a growing city with a large population. As a result, numerous brick fields have been established in Pabna Municipality and the adjacent areas. As a result, brickfield smoke emissions are increasing daily. Various socio-economic, environmental, and health-related issues have emerged. However, no initiatives were taken to preserve the air quality of Pabna. In Pabna, Bangladesh, the research looks into the effects of Brickfields' smoke emissions on socioeconomic circumstances and human health. This study determines which diseases are caused by air pollution, as well as the social and economic effects of the brickfields on Pabna municipality. In addition, the air quality index (AQI) has been determined by the study. This research was utilized to spur the development of future studies aimed at reducing and controlling the air pollution concerns related to brickfields in this area. It is also anticipated that the survey would help develop future control strategies for creating a pollution-free environment in Pabna, Bangladesh. The influence of brickfield-related smoke on human health and socioeconomic situations will be investigated in this study. Finally, the research will give suggestions based on stakeholder input to assist authorities in developing a viable, long-term strategy for the future.

Effects of various organic manures on the growth, performance and biomass production of Mahogany seedlings, an experiment was carried out in the net house of the Department of Soil, Water and Environment, University of Dhaka. Nine types of manures, viz. Kazi, ACI, Payel, BGF-1, Mazim, SK, Supermill, Sebok, Sufola organic manures were used separately at the rate of 12 ton/ha. Another dose of NPK inorganic fertilizer was used at the rate of 5kg/ha N, 3 kg/ha P, 3 kg/ha K respectively. Height, leaf area, and fresh and dry weights of leaf varied significantly (p≤ 0.5) and increased with time. Maximum leaf number (41.33 no./plant) and branch (6.33 no./plant) was found in Payel compost but maximum N concentration (2%) in leaf was obtained in Sebok treatment. Highest plant height (48.33 cm), leaf area (204.766 cm2/plant), girth (3.067 cm/plant), fresh weight (37.79g/plant), dry weight (9.16 g/plant), and length of petiole (6.33 cm) were recorded in Supermill treatment at harvest. Results showed that the overall best growth performance of seedlings was achieved in Supermill compost. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(2): 19-26