Browsing by Author "Alam, M. S."

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A Study on Bangladesh Power System Fault Level Management
(IEEE, 2020-01-30) Kabir, M. A.; Alam, M. S.; Alam, Mohammad Khurshed
Future's generation and load planning of Bangladesh illustrates rapid development of power system in upcoming year which shows many new generating stations as well as transmission lines are going to be installed. This implies that the fault current level at substation buses will further increase and forces transformers, switchgear and other equipment to operate near their thermal or stability limit. Due to the expansion and more interconnected grid system the fault current levels increase beyond the capabilities of the existing equipment. So, this is the high time to put attention on fault level management of Bangladesh power system. There are different passive techniques like current limiting reactor (CLR), neutral grounding policy (NGR), network & bus splitting to retain the fault current within a acceptable range. This paper takes two substations of Bangladesh power system of higher fault level under consideration and discusses about the different passive techniques to reduce the fault level. Here the load flow and short circuit studies were carried out using Digsilent PowerFactory software to find the way to manage the fault level of Bangladesh power system.
A Study on Measuring the 222Rn in the Buriganga River and Tap Water of the Megacity Dhaka
(PLOS ONE, 2023-05-23) Alam, M. S.; Siraz, M. M. Mahfuz; A. M., Jubair; Das, S. C.; Bradley, D. A.; Khandaker, Mayeen Uddin; Tokonami, Shinji; Shelley, Afroza; Yeasmin, Selina
Radon (222Rn), an inert gas, is considered a silent killer due to its carcinogenic characteristics. Dhaka city is situated on the banks of the Buriganga River, which is regarded as the lifeline of Dhaka city because it serves as a significant source of the city’s water supply for domestic and industrial purposes. Thirty water samples (10 tap water from Dhaka city and 20 surface samples from the Buriganga River) were collected and analyzed using a RAD H2O accessory for 222Rn concentration. The average 222Rn concentration in tap and river water was 1.54 ± 0.38 Bq/L and 0.68 ± 0.29 Bq/L, respectively. All the values were found below the maximum contamination limit (MCL) of 11.1 Bq/L set by the USEPA, the WHO-recommended safe limit of 100 Bq/L, and the UNSCEAR suggested range of 4–40 Bq/L. The mean values of the total annual effective doses due to inhalation and ingestion were calculated to be 9.77 μSv/y and 4.29 μSv/y for tap water and river water, respectively. Although all these values were well below the permissible limit of 100 μSv/y proposed by WHO, they cannot be neglected because of the hazardous nature of 222Rn, especially considering their entry to the human body via inhalation and ingestion pathways. The obtained data may serve as a reference for future 222Rn-related works.
Analysis of natural convective heat transport in homocentric annuli containing nanofluids with an oriented magnetic field using nonhomogeneous dynamic model
(Springer, 2017-02-28) Uddin, Md. Jashim; Rahman, M. M.; Alam, M. S.
In this paper, the time-dependent natural convective heat transport in homocentric annuli containing nanofluids accompanying an oriented magnetic field using a nonhomogeneous dynamic mathematical model is numerically investigated. The analysis is carried out for four different shapes of inner walls such as triangular, square, elliptical and cylindrical. The outermost cylindrical boundary of the annulus is regarded at an unvarying low temperature and undifferentiated thermal condition on the inner surface of the annulus is considered. A finite element method is implemented for finding the solutions to the nanofluid equations of the problem. The magnetite iron oxide–kerosene nanofluid has been taken to gain insight into the thermal fields and concentration levels in terms of isotherms and isoconcentrations, respectively. The local Nusselt number distributions along the interior and exterior boundaries have been displayed for various flow parameters of the problem. To find the best performer, the average Nusselt number enhancements are demonstrated varying four different shapes of inner wall for ten sorts of nanofluids compared to that of base fluids. Results show that the dispersion of local Nusselt number decreases with the increase in the nanoparticle diameter and Hartmann number, whereas it enhances with the increase in the measure of nanoparticle by volume, magnetic field inclination angle and Rayleigh number. It is also found that the inner shape of the annulus significantly affects the thermal flow as well as the Nusselt number. Full Text Link: https://doi.org/10.1007/s00521-017-2905-z
Assessing Radioactivity in Soil in the Vicinity of Steel Production Industries
(Taylor & Francis Group, 2023-12-12) Siraz, M. M. Mahfuz; Alam, M. S.; Mahmud, Jubair Al; Rashid, Md. Bazlar; Hossain, Z.; Elrahim, Elrashed Abd; Osman, Hamid; Khandaker, Mayeen Uddin; Yeasmin, S.
The steel production process results in the emission of naturally occurring radioactive and toxic heavy metals, which are inherent in the raw materials employed as the initial components. To assess the public exposure through atmospheric dispersions of such radiotoxic metals originating from the production plants and the disposal of associated wastes in nearby landfills, a pioneering study was conducted to assess the radioactivity in forty-four soil samples collected from the environs of sixteen different steel mills in the megacity of Dhaka, Bangladesh, using high-purity germanium (HPGe) γ-ray spectrometry. The results indicated activity ranges of 6 ± 1 to 37 ± 3 Bq/kg, 6 ± 1 to 45 ± 4 Bq/kg, and 101 ± 9 to 470 ± 45 Bq/kg for 226Ra, 232Th, and 40K, respectively, in the soil samples. Radiological hazard parameters were assessed, and none surpassed the recommended limits set by various international organisations. These results underscore that soil samples obtained from the vicinity of the steel mills do not present an immediate and significant risk to the local community in terms of radiation hazards. Nevertheless, given the observed physical alterations in the soil samples, likely resulting from chemical reactions with pollutants released from the steel mills, it is advisable to refrain from using the examined soil samples for agricultural or construction purposes. This study aims to establish a foundational dataset, serving as a crucial reference for the upcoming commissioning of the Rooppur Nuclear Power Plant in the fiscal year 2024–25. This study advocates for the adoption of a systematic and regular monitoring programme to assess radiation levels in the vicinity of steel production industries across the country.
Convective flow of nanofluid along a permeable stretching/shrinking wedge with second order slip using Buongiorno’s mathematical model
(IJAAMM, 2016-01-10) Alam, M. S.; Haque, M. M.; Uddin, Md. Jashim
In this paper we have studied an unsteady two-dimensional laminar forced convective hydrodynamic heat and mass transfer flow of nanofluid along a permeable stretching/shrinking wedge with second order slip velocity using Buongiorno’s mathematical model. Using appropriate similarity transformations, the governing non-linear partial differential equations are reduced to a set of non-linear ordinary differential equations which are then solved numerically using the function bvp4c from MATLAB for different values of the parameters. Numerical results for the nondimensional velocity, temperature and nanoparticle volume fraction profiles as well as local skin-friction coefficient, local Nusselt number and local Sherwood number for different material parameters such as wedge angle parameter, unsteadiness parameter, Lewis number, suction parameter, Brownian motion parameter, thermophoresis parameter, slip parameter and Biot number are displayed in graphically as well as tabular form and discussed them from the physical point of view. The obtained numerical results clearly indicate that the flow field is influenced significantly by the second order slip parameter as well as surface convection parameter.
Evaluation of Radioactivity in Soil and Rock Samples From an Undiscovered Sea Beach in the Southeastern Coastline of Bangladesh and Associated Health Risk
(Springer, 2023-08-10) Siraz, M.M. Mahfuz; Kamal, Md Hossain; Khan, Zulfiqar Hasan; Alam, M. S.; Mahmud, Jubair Al; Rashid, Md Bazlar; Khandaker, Mayeen Uddin; Osman, Hamid; Yeasmin, S.
This study marks the first-ever assessment of radiological hazards linked to the sands and rocks of Patuartek Sea Beach, situated along one of the world's longest sea beaches in Cox' Bazar of Bangladesh. Through the utilization of an HPGe detector, a comprehensive analysis of the activity concentrations of 226Ra, 232Th, and 40 K was conducted, and their activity ranged from 7 to 23 Bq/kg, 9-58 Bq/kg, and 172-340 Bq/kg, respectively, in soils, and 19-24 Bq/kg, 27-39 Bq/kg, and 340-410 Bq/kg, respectively, in rocks. Some sand samples exhibited elevated levels of 232Th, while the rock samples displayed higher levels of 40 K compared to the global average. The radiological hazard parameters were assessed, and no values surpassed the recommended limits set by several international organizations. Hence, the sands and rocks of Patuartek sea beach pose no significant radiological risk to the residents or tourists. The findings of this study provide crucial insights for the development of a radiological baseline map in the country, which is important due to the commissioning of the country's first nuclear power plant Rooppur Nuclear Power Plant. The data may also stimulate interest in the rare-earth minerals present in the area, which is important for the electronics industry, thorium-based nuclear fuel cycles.
Evaluation of Transfer Factors of 226Ra, 232Th, and 40K Radionuclides from Soil to Grass and Mango in the Northern Region of Bangladesh
(Springer, 2023-04-17) Siraz, M. M. Mahfuz; Das, S. K.; Mondol, M. S.; Alam, M. S.; Mahmud, Jubair Al; Rashid, Md. Bazlar; Khandaker, Mayeen Uddin; Yeasmin, S.
Bangladesh is a rapidly developing country, which is vulnerable to various types of pollution due to the large-scale industrial and associated human activities that might potentially affect the locally harvested foodstuffs. Therefore, the transfer factor is an essential tool to assess the safety of foodstuffs due to the presence of natural radioactivity in environmental matrix and/or strata. This is a first study of its kind conducted in a well-known region for mango farming in Bangladesh, measuring the uptake of naturally occurring radioactive materials (NORMs) by grass and mango from soil to assess the ingestion doses to humans. The HPGe gamma-ray detector was used to determine the concentrations of NORMs in samples of soil (20), grass (10), and mango (10), which were then used to calculate the transfer factors of soil to grass and soil to mango. Average activity concentrations of 226Ra, 232Th, and 40K in associated soil samples (47.27 ± 4.10, 64.49 ± 4.32, 421.60 ± 28.85) of mango and 226Ra and 232Th in associated soil samples (45.07 ± 3.93, 52.17 ± 3.95) of grass were found to exceed the world average values. The average transfer factors (TFs) for mango were obtained in the order of 40K(0.80) > 226Ra (0.61) > 232Th (0.31), and for grass, it shows the order of 40K (0.78) > 232Th (0.64) > 226Ra (0.56). However, a few values (3 mango samples and 3 grass samples) of the estimated TFs exceeded the recommended limits. Moreover, Bangladesh lacks the transfer factors for most of the food crops; therefore, calculation of TFs in the major agricultural products is required all over Bangladesh, especially the foodstuffs produced near the Rooppur Nuclear Power Plant, which is scheduled to be commissioned in 2023.
FEMALE LABOUR WAGE AND THEIR WAGE GAP WITH MALE COUNTERPART IN SOME SELECTED AREAS OF BANGLADESH
(Sher-e-Bangla Agricultural University Research System (SAURES), Dhaka, Bangladesh, 2013-07) Sannyashi, P. R.; Haque, S.; Yasmin, F.; Alam, M. S.
This study addressed the nature and extent of female wage labour and the wage gap with their male counterpart in the selected areas of Sirajgonj and Dhaka Districts of Bangladesh. There were four categories of labour. Farm survey method was used to collect primary data from the field labour and the rice mill worker and labour of construction work at few villages under Royganj, Tarash, and Salanga Upazilas of Sirajgonj and Dhaka district for the study. ANOYA and ANCOYA Models were used for analyzing the data set. It is noted that, the female labour's working hours/day, working days/week are much less than male labour that is why wage of female labours is much lower than the male labours in selected areas of Bangladesh. It is also noted that the wage rate is much lower in the case of female workers. The major findings of the study indicated the way of increasing income of female labour depends on the reduction of the wage gap (I 239Tklmonth).Therefore, the study firmly concluded with the recommendation that the wage (tklhr) of female worker should increase rationally for ensuring the equal treatment of both male and female.
Fundamentals of nanofluids: evolution, applications and new theory
(Elsevier, 2016) Uddin, Md. Jashim; Kalbani, Khamis S. Al; Rahman, M. M.; Alam, M. S.; Al-Salti, N.; Eltayeb, Ibrahim
In the past decade, quick developments in nanotechnology have created quite a lot of prospect for the scientists and engineers to check up. Nanofluid is one of the amazing consequences of such progression. Nanofluids are engineered by suspending nanoparticles with average sizes below 100 nm in traditional heat transfer fluids such as water, oil, and ethylene glycol etc. Nanofluids are considered to offer important advantages over conventional heat transfer fluids. A very small amount of guestnanoparticles, when dispersed uniformly and suspended stably in base fluids, canprovide dramatic improvements in the thermal properties of host fluids. Stable and highly conductive nanofluids are produced by generally, one-step and two-step production methods. Both approaches to creating nanoparticle suspensions suffer from agglomeration of nanoparticles, which is a key issue in all technology involving nanopowders. In trying to understand the unexpected discoveries and so to overcome the limitations of classical models, a number of investigators have proposed new physical concepts, mechanisms, and developed new models for enhancing the transport properties. In the present work, wide-ranging fundamental evolution of nanofluids have been discoursed thoroughly by sketching out a gargantuan depiction of the diminutive biosphere of nanofluids through a brief review of some chronological foremost milestone such as the concepts of nanofluids, the preparations and performances of nanofluids, conductivity, viscosity and density correlations of nanofluids, and potential applications and benefits of nanofluids. Also, different kinds of modeling and very important slip mechanisms of constructing heat transfer modeling of nanofluids have been discussed comprehensively in this study. Furthermore, we have established new mathematical equations theoretically for electrical conductivity and thermophoretic velocity in nanofluids as well as nanoparticles mass flux equation due to Brownian diffusion and thermal diffusion which can be used for general transport nanofluids modeling. Our results of thermal diffusion coefficient are also justified by the experimental findings.
Influence of magnetic field and thermophoresis on transient forced convective heat and mass transfer flow along a porous wedge with variable thermal conductivity and variable Prandtl number
(IJAAMM, 2016-05-12) Rahman, ATM. M.; Alam, M. S.; Uddin, Md. Jashim
In this paper, the influence of magnetic field and thermophoresis on unsteady two-dimensional forced convective heat and mass transfer flow of a viscous, incompressible and electrically conducting fluid along a porous wedge in the presence of the temperature-dependent thermal conductivity and variable Prandtl number have been studied numerically. The governing nonlinear partial differential equations have been transformed into nonlinear ordinary one by introducing a similarity transformation. The transformed ordinary differential equations are solved for similar solutions by applying Nachtsheim- Swigert shooting iteration technique along with the Runge-Kutta integration scheme. Comparison with beforehand published work is performed and excellent agreement is found. Results for the dimensionless velocity, temperature, concentration, thermophoretic velocity and thermophoretic particle deposition velocity are presented for various parametric conditions. The numerical results show that the thermophoretic particle deposition velocity significantly influenced by the magnetic field parameter. Moreover, it is found that the rate of heat transfer significantly influenced by the variation of the thermal conductivity and Prandtl number. Thus, in any physical model where thermal conductivity of the fluid is temperature dependent, the Prandtl number within the boundary layer must be treated as variable rather than constant.
Investigations of Natural Convection Heat Transfer in Nanofluids Filled Horizontal Semicircular‐Annulus using Nonhomogeneous Dynamic Model
(Columbia International Publishing, 2016-11-05) Uddin, Md. Jashim; Alam, M. S.; Al‐Salt, N.; Rahman, M. M.
In this paper, the problem of unsteady convective flow of nanofluid in a horizontal semicircular‐annulus using nonhomogeneous dynamic mathematical model has been investigated. The outer wall of the annulus is considered a colder wall and the inner is maintained at three different temperatures (constant, quadratic and sinusoidal) while two other walls are thermally insulated. The Galerkin weighted residual finite element method has been employed to solve the governing partial differential equations after converting them into non‐ dimensional form using suitable transformation of variables. In the numerical simulations, the cobalt‐ kerosene nanofluid has been taken to gain insight into the flow, thermal fields as well as concentration levels of nanofluids. Local Nusselt number and temperature gradient magnitude on the hotter and colder wall are displayed as line graphs. The average Nusselt number for cobalt‐ kerosene nanofluid is displayed as line graphs for different flow parameters including amount, shape and size of nanoparticles. Also, the average Nusselt number is presented as a bar diagram for 12 types of nanofluids. The result shows that 1‐20 nm size nanoparticles are uniform and stable in the solution. The average Nusselt number increases significantly, as nanoparticle volume fraction, Rayleigh number increases and nanoparticle diameter decreases. Sinusoidal heating inner wall of annulus exhibits higher heat transfer rate. Average Nusselt number of cobalt‐ kerosene nanofluid is much higher than that of other 11 types of nanofluids which are studied in the present analysis. Full Text Link: doi:10.7726/ajhmt.2016.1024
Natural Convective Heat Transfer Flow of Nanofluids Inside a Quarter-Circular Enclosure Using Nonhomogeneous Dynamic Model
(Springer, 2017-05) Uddin, Md. Jashim; Alam, M. S.; Rahman, M. M.
In this paper, we have studied the problem of two-dimensional transient convective flow and heat transfer in nanofluids in a quarter-circular-shaped enclosure using newly proposed nonhomogeneous dynamic mathematical model. The round wall of the enclosure is maintained at constant low temperature and the variable thermal condition on the bottom heated wall is considered, whereas the vertical wall is regarded as adiabatic. The enclosure is permeated by an inclined uniform magnetic field. The Galerkin weighted residual finite element method has been employed to solve the governing nondimensional partial differential equations. The result shows that 1- to 10-nm-sized nanoparticles are uniform and stable in the solution. The external magnetic field and its direction control the flow pattern of nanofluid significantly. The average Nusselt number increases significantly, as nanoparticle volume fraction, magnetic field inclination angle and Rayleigh number increase. Average Nusselt number of cobalt–kerosene nanofluid is much higher than other 17 types of nanofluids which are studied in the present analysis. The flow behaviors and the heat transfer rates of 18 types of nanofluids have been presented for the scientific and engineering community to become familiar with such nanofluids and apply them in practical applications. Full Text Link: https://doi.org/10.1007/s13369-016-2330-0
Numerical Study Of Transient Hydromagnetic Forced Convective Slip Flow Over A Porous Rotating Disk With Thermophoresis
(JNEEA, 2015-11-04) Rahman, M. M.; Alam, M. S.; Uddin, Md. Jashim; Vajravelu, K.; Rahman, M. M.
This paper deals with the problem of unsteady, laminar forced convective heat and mass transfer flow of a viscous incompressible fluid with thermophoresis due to a porous rotating disk in the presence of partial slip and magnetic field. The numerical simulation is carried out for the solution of nonlinear partial differential equations by applying Nachtsheim–Swigert shooting iteration technique along with sixth-order Runge–Kutta iteration scheme. Comparison with previously published work for the steady case is performed and results are found to be in excellent agreement. The effects of the model parameters on the dimensionless velocity (radial, tangential and axial), temperature, and concentration fields are displayed graphically. The local skin-friction coefficient (radial and tangential) and the local Nusselt number are also calculated and tabulated. The obtained results show that the axial thermophoretic velocity is increased with the increasing values of the thermophoretic coefficient and the thermophoresis parameter. The results also show that the applied magnetic field and the slip parameter strongly control the flow, heat and mass transfer characteristics.
Radioactivity in Soil and Coal Samples Collected From the Vicinity of the Coal-Fired Thermal Power Plant and Evaluation of the Associated Hazard Parameters
(Taylor & Francis Group, 2023-03-29) Siraz, M. M. Mahfuz; Dewan, Md. Jafor; Chowdhury, Md. I. A.; Al Mahmud, Jubair; Alam, M. S.; Rashid, Md. Bazlar
This research assesses radioactivity in soil and coal samples around the Barapukuria coal-fired thermal power plant using a high-purity germanium detector. The range of activity of 226Ra, 232Th, and 40K in the studied soil samples were 14–75, 16–112, and 132–460 Bqkg−1, respectively and the respective activity in coal samples ranged from 14–30, 16–39 and 72–182 Bqkg−1. The majority of the hazard indices (absorbed dose rate, gamma index, effective dose and excess lifetime cancer risk) were higher than the world average, which shows that long-term exposure to terrestrial ionising radiation is not safe for coal miners and the local community. The presence of minerals like monazite and zircon, granitic type parent rock, bottom ash discharged adjacent on lowlands, fly ash deposition, different geochemical and physicochemical properties, dominant wind directions, the artificial contamination, meteorological conditions, leaching caused by rainwater- may have a crucial influence on NORM distributions. The quantitative results of this study have important implications for planning a larger and more modern coal-fired power plant, and this study’s findings inspire municipal officials to restrict and monitor the release of fly ash nearby coal-fired power plants. In addition, it is essential to monitor the health of individuals (workers and locals) near the power plant.
STATUS OF FRUIT SEED TRADE IN BANGLADESH AND TRADERS' PRACTICE FOR SEED QUALITY
(Sher-e-Bangla Agricultural University Research System (SAURES), Dhaka, Bangladesh, 2010-01) Chowdhury, M. S. M.; Hossain, I.; Ali, M. R.; Alam, M. S.
Seed is the vital component in the production of quality planting materials (QPM). A survey was carried out in 260 upzilla under 52 districts of Bangladesh during 2005-06 to study the status of seed trade of different fruit species in the country. The survey revealed that more than 20 fruit species traded in 531 seed stores and a total of 16288.10 kg seeds were sold out amounting Tk. 35.90 million. Variations in different fruit seeds traded in surveyed districts of Bangladesh were also observed. Significant number of seed traders expressed their awareness about the deterioration of seed due to attack of pathogens but did not take any measurement to protect their seeds. The present investigation showed that considerable amount of seeds of fruit species are being traded every year. as such, the issue of fruit species demands attention of the concerned authorities to take necessary action.
Unsteady MHD free convective heat transfer flow along a vertical porous flat plate with internal heat generation
(IJAAMM, 2014-12-17) Alam, M. S.; Haque, M. M.; Uddin, Md. Jashim
In this study, a similarity analysis is made for an unsteady two-dimensional MHD free convective and heat transfer flow of a viscous incompressible fluid along a vertical flat plate with internal heat generation/absorption. The governing time-dependent boundary-layer equations are reduced to non-linear ordinary differential equations by introducing a similarity transformation. The obtained similarity equation for both steady and unsteady cases have been compared with previously published work and excellent agreement is found. The resulting local similarity equations for the unsteady flow have been solved numerically by applying Nachtsheim-Swigert shooting iteration technique along with sixth order Runge-Kutta integration scheme. Numerical results for the dimensionless velocity and temperature profiles as well as the local skin-friction coefficient and local Nusselt number are displayed both by graphically and numerically for different values of the physical parameters entering into the problem.The significance of the physical parameters on the flow field is discussed in detail.The results shows that the velocity profile and the temperature profile is much pronounced with the increasing value of heat generation and unsteadiness parameter but the opposite effect can be found for suction parameter and Prandlt number. Also, the result shows that the values of skin-friction and wall heat transfer are strongly influenced by unstediness and heat generation parameter.
Vertical distributions of radionuclides along the tourist-attractive Marayon Tong Hill in the Bandarban district of Bangladesh
(Daffodil International University, 2023-02-10) Siraz, M. M. Mahfuz; Roy, Debasish; Dewan, Md. Jafor; Alam, M. S.; Jubair A. M.; Rashid, Md. Bazlar; Khandaker, Mayeen Uddin; Bradle, D. A.; Yeasmin, S.
This is the first attempt in the world to depict the vertical distribution of radionuclides in the soil samples along several heights (900 feet, 1550 feet, and 1650 feet) of Marayon Tong hill in the Chittagong Hill Tracts, Bandarban by HPGe gamma-ray spectrometry. The average activity concentrations of 232Th, 226Ra, and 40K were found to be 37.15 ± 3.76 Bqkg−1, 19.69 ± 2.15 Bqkg−1, and 347.82 ± 24.50 Bqkg−1, respectively, where in most cases, 232Th exceeded the world average value of 30 Bqkg−1. According to soil characterization, soils ranged from slightly acidic to moderately acidic, with low soluble salts. The radium equivalent activity, outdoor and indoor absorbed dose rate, external and internal hazard indices, external and internal effective dose rates, gamma level index, and excess lifetime cancer risk were evaluated and found to be below the recommended or world average values; but a measurable activity of 137Cs was found at soils collected from ground level and at an altitude of 1550 feet, which possibly arises from the nuclear fallout. The evaluation of cumulative radiation doses to the inhabitants via periodic measurement is recommended due to the elevated levels of 232Th.This pioneering work in mapping the vertical distribution of naturally occurring radioactive materials (NORMs) can be an essential factual baseline data for the scientific community that may be used to evaluate the variation in NORMs in the future, especially after the commissioning of the Rooppur Nuclear Power Plant in Bangladesh in 2024.
YIELD PERFORMANCE OF TEN MUNGBEAN GENOTYPES AT MAGURA
(Sher-e-Bangla Agricultural University Research System (SAURES), Dhaka, Bangladesh, 2011) Sultana, N.; Alam, M. S.
With a view to study the performance of summer mungbean genotypes in respect of yield and yield attributes, an experiment was carried out in the experiment Held of Bangladesh Institute of Nuclear Agriculture sub-station at Magura during the period from February 2006 to May 2006. The experimental treatment comprised often genotypes viz. N4J-207, N4.1-210, N2M-402, EiJ-603, EJ-60S, E2M-SII, E.I-913, Binarnoog-S, Binamoog-7 and Barimoog-S. Among the genotypes, last three were widely cultivated varieties and the rest seven were advanced mutants. The experiment was laid out in Randomized Complete Block Design (RCBD) with tour replications. The results indicated that the plant height, number of branches plant"], TDM plant"], number of pods plant"], pod length, number of seeds plant"], lOOO-seedweight, seed yield plant"], seed yield m"l and harvest index varied significantly among the genotypes. It was observed that the highest plant height (4S.S3 em) and maximum number of branches (9.75) were produced by the genotype EjJ-603, but maximum number of pods plant"] (2S.40) and number of seeds plant"] (176.00) were produced by the genotype N4J-207. The genotype Barimoog-5 produced the highest pod length (7.S7 em) and lOOO-seed weight (47.00 g). Maximum total dry matter (20.96 g) was produced by the genotype N2M-402. The genotype N4J-207 produced maximum seed yield/plant (6.69 g), seed yield/m2 and the maximum harvest index (47.67%). The mutant N4J-207 may be released after few more trials in farmers' Held for commercial cultivation.