Browsing by Author "RAHMAN, MD. HABIBUR"

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AN ASSESSMENT OF CURRENT STATE AND FUTURE POTENTIAL OF BIOFLOC TECHNOLOGY IN PANCHAGARH DISTRICT
(HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200, BANGLADESH, 2024-12) RAHMAN, MD. HABIBUR
The present study was conducted to know the current state and future potential of biofloc technology in the Panchagarh district that cover five upazilas such as Panchagarh sadar, Tentulia, Debiganj, Boda and Atwari starting from July to December 2022. The study was done by analyzing socio-demographic characteristics, farming practices, and challenges faced by local farmers. Data were collected from 55 biofloc farmers through surveys and interviews. The findings revealed that 62.5% of respondents were young farmers aged between 21-30 years, with 40.5% having graduated from formal education systems. The majority (80.58%) hailed from nuclear families, while 74.54% did not hold any organizational membership. Fish culture (30.58%) and biofloc farming (20.32%) were identified as major occupations. Biofloc culture was predominantly practiced by farmers with 7 to 12 months of experience (51.58%), although 70.35% lacked formal training before initiating farming. Most farms (56.36%) operated on areas less than one decimal, with 55.58% having one or two tanks constructed primarily from cement (83.63%). Groundwater was the main water source (92.48%), and partial water exchange practices were widely adopted. Farmers used synthetic probiotics such as Pond Care (40.8%), Protox Aqua (22.81%), Aqua photo (17.32%), Dellomax (10.94%) and Ecopond (6.13%). The preferred tank shapes were rectangular (50.85%) and circular (35.6%), with a depth ranging between 4 to 6 feet. Despite challenges such as technical (50%) and financial (22.75%) difficulties, biofloc farmers reported fish production rates of 301-400 kg per cycle in 38.12% of cases. Diseases, particularly fungal (45.9%) and bacterial (34.5%), posed significant threats. Total harvesting was preferred by 61.82% of farmers, and most sales (52.72%) were made to wholesalers. The findings highlight the promising but challenging adoption of biofloc technology in the district. Investments in farmer training, disease management, and financial support can foster sustainable aquaculture practices and enhance productivity in Panchagarh.
CREDIT MANAGEMENT POLICY & PERFORMANCE ANALYSIS OF JANATA BANK LIMITED
(2016) RAHMAN, MD. HABIBUR
The Janata Bank Limited is one of the leading public banks operating in Bangladesh. This internship report is prepared by me which was my three months efforts to work under this bank. All sorts of necessary efforts have been made to make the report as authentic as possible. All the aspects of credit and risk management of JBL like; rules, regulations activities, approval processes of loan, credit operation dept. And also credit collection department, various product diversity and their facilities and recovery process of different types of loan etc have been attached to this report. Finally some recommendations are started for mending the problem, so if the authority concerned to my recommendations, they might get a positive result. Lastly I am really grateful to almighty Allah for letting me prepare such as report.
Effect of different transplanting dates on the yield and yield components of Binadhan-14 (Oryza sativa L.) under climatic conditions in Bangladesh
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. MONJURUL; ISLAM, MD. SHAHIDUL; RAHMAN, MD. HABIBUR; SAHA, MAMATA; BIR, MD. SHAHIDUL HAQUE; SOHEL, MD. MEHEDI HASAN; LEE, JEUNG JOO; PARK, KEE WOONG
Binadhan-14 (Oryza sativa L.) is a late transplanting rice variety with high yield potential, developed for boro season by BINA in 2013. Effects of different transplanting dates to yield of Binadhan-14 were assessed at three locations in Bangladesh during boro season in 2014-15. BRRI dhan 28 was used as a check variety. At each location, one month old seedlings were transplanted at five different dates with 15-day intervals between February 1 and April 1, 2015. A randomized complete block design with three replications was used to lay out plots in the experiment. Transplanting dates significantly influenced grain yield and yield contributing parameters, such as plant height, panicles per hill, panicle length and filled grains per panicle, except for 1000-grain weight. The highest grain yields were obtained when the rice was transplanted on February 1 and 15, 2015. The highest yield of Binadhan-14 was obtained at Rangpur (6.75 t/ha), followed by Mymensingh (6.25 t/ha) and Magura (5.90 t/ha). Results of this study suggest that February 1 to 15 would be the best time to transplant Binadhan-14 as a late transplanting boro variety under the climatic conditions in Bangladesh.
Effect of different transplanting methods on yield of Binadhan-14 (Oryza sativa L.) at late boro season under climate change
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. MONJURUL; RAHMAN, MD. HABIBUR; ISLAM, MD. SHAHIDUL; SAHA, MAMATA; KAMRUZZAMAN, MD.; BIR, MD. SHAHIDUL HAQUE; ROH, SUG-WON; PARK, KEE WOONG
To find out the suitable planting method under climate change on the yield and yield attributes of late boro rice in Bangladesh, an experiment was conducted at Bangladesh Institute of Nuclear Agriculture (BINA) farms at boro season of 2014-15. Three different sowing methods viz., direct seeding with sprouting seed & without sprouting seed and transplanting were practised to evaluate Binadhan-14 along with one check BRRI dhan 28. Due to climate change, water level goes downwards, government wants to replace boro areas as late boro to minimize irrigation water and keep the water level constant. In this study, Binadhan-14 showed higher grain yield than BRRI dhan 28. Comparative effect of transplanting method, the highest grain yield was produced in transplanting method. Direct seeding was seven days earlier than transplanted rice. However, considering crop duration direct seeding with sprouting seed will be effective by sacrificing grain yield.
Effect of herbicides on weed infestation and yield in boro rice
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. SHAHIDUL; ISLAM, MD. MONJURUL; RAHMAN, MD. HABIBUR; BIR, MD. SHAHIDUL HAQUE; LEE, JEUNG JOO; PARK, KEE WOONG
A field experiment was conducted at the agronomy field of the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh, under wet land condition during December 2014 to May 2015. The aim was to see the effects of the weed control treatments on crop growth and yield in boro rice. Five selected herbicides (Metsulfuron-methyl 20 WG at 50 g/ha, pretilachlor 500 EC at 988 ml/ha, bensulfuran methyl 4%+acetachor 14% 18 WP at 800 g/ha, pyrazosulfuron-ethyl 10 WP at 125 g/ha and butachlor 5G at 25 kg/ha) were tested along with two hand weedings. Population density, fresh and dry weight of weed were taken. Eight weed species belonging to five families, namely, Echinochloa colonum, Paspalums crobiculatum, Monochoria vaginalis, Leersia hexandra L., Scirpus mucronatus L., Digitaria sanguinalis, Cyperus rotundus and Eclipta alba Hassk were found to grow in the experimental plots. Among the weed control treatments highest grain yield (5.73 t/ha) was produced with the treatment pyrazosulfuron-ethyl 10 WP at 125 g/ha followed by two hand weedings (5.50 t/ha). The increased yield due to application of herbicide contributed mainly from increasing the number of total tillers per plant, effective tillers per plant, filled grains per panicle and 1000-seed weight (g). Maximum benefit : cost ratio with pyrazosulfuron-ethyl 10 WP at 125 g/ha suggested that this herbicidal treatment could be used as an alternative when labour was a limiting factor in producing transplant boro rice.
HEAT TRANSFER PERFORMANCE OF COOLING TOWER WITH NANOFLUIDS
(Research and Development Wing, MIST, 2025-07) RAHMAN, MD. HABIBUR
Cooling towers are evaporative heat transfer devices in which atmospheric air cools warm water with direct contact between the air and the water by evaporating cooling of water. The main objective of this study is to analysis the cooling tower performance, with induced draft cooling tower and finding out the effect of adding nanofluids of Al Oxide (Al2O3), Zn Oxide (ZnO), and Ti Oxide (Ti2O3) with base fluid as water. This was done by establishing experimental set up supported with computer program and varying the quality of circulating fluids by adding together at different ratio. Recently large numbers of experiments have been carried out to evaluate the effect of nanofluid in enhancement of the heat transfer rate in various heat exchangers. The heat transfer enhancement using nanofluid mainly depends on type of nanoparticles, size of nanoparticles, shape of nanoparticles, and type of base fluid and concentration of nanoparticles in the base fluid. Therefore, this study deals with several experimental investigation of the thermal performance of a prototype mechanical wet cooling tower with a counter flow arrangement. Different volume concentrations ranging from 0.18 to 0.50 vol. % of stable Al Oxide (Al2O3), Zn Oxide (ZnO), and Ti Oxide (Ti2O3) nanoparticles of 80, 35, and 70 nm diameter were considered. Water was taken as a base fluid, and the experiment was carried out at 60, 70, and 80 °C, respectively, in laboratory conditions. The study revealed that an increase in the volume concentration of the nanofluids increased the cooling range, cooling efficiency, convective heat transfer coefficient, tower characteristic called number of transfer unit (NTU), and effectiveness of the cooling tower compared with water at the same mass flow rate and inlet temperature. However, increasing the volume concentration increased the viscosity of the nanofluids, leading to an increase in friction factor. From the result it has been obtained a comparative study on terms of tower characteristics (kav/L), water to air flow ratio (L/G), efficiency, range, percentage of make-up water and evaporation heat loss are presented in graphical form. The graph shows that the performance of cooling tower is affected by the type of cooling tower and the quality of circulating fluids. The graphical analysis shows the cooling tower characteristics and efficiency decreases with an increase in (L/G), the induced draft cooling tower shows better performance than natural draft cooling tower. It is revealed that at higher volume concentration of nanofluid, cooling range would increase by 29% at low flow rates which is also vi accompanied by the heat lost by water, and thereby, average increase in efficiency is 27% at temperature 80°C. This happens more significantly with Al2O3 and ZnO nanoparticles when they are added in base fluid with different ratios. For instance, for 0.18% volume concentration of ZnO, at an inlet water temperature of 66.4 °C and water/air (L/G) flow ratio of 1.93, the cooling range increased by 3.62%, cooling efficiency increased by 33.3%, and NTU increased by 50.5% compared with fresh water (FW). Prediction of thermal performance is necessary for thermo-fluid engineering applications as well as manufacturing industries. Hence, the validation of the developed mathematical model in this study has been carried out by making comparison of the measured and predicted thermal performance. This study presents an intelligent approach based on fuzzy expert system (FES) of a cooling tower. FES links between volumetric concentration (VC), mass flow rate of liquid to air ratio (L/G) and flow rate (FR) and cooling efficiency (CE) and range (CR). To validate the mathematical model, the thermal performance in terms of cooling efficiency (CE) and cooling range (CR), L/G and liquid flow rate are measured on the developed cooling tower and compared with the predicted ones. Values are obtained from experiments on an induced draft cooling tower with nanofluids in different VC of 0%, 0.06%, 0.18% and 0.30%, respectively. The efficiency of nanofluids slightly increases about 5.04–8.82% with the growth of VC related to water at the highest value of L/G. Whereas, the efficiency significantly increased about 11–50% with the increase of VC at the lowest value of L/G. FES model has been developed for the prediction of cooling efficiency and range with nanofluid in different VC. For instance, in case of CE, the mean of measured (experiment) and predicted (FES) values have been found as 15.84% and 15.90%, respectively. Similarly, for CR, the values have been found as 3.30°C and 3.28°C, respectively. The correlation coefficients of cooling efficiency and cooling range are found as 0.961, and 0.997, respectively. The mean relative error of measured and predicted values from the FES model on cooling efficiency and cooling range are found as 9.0 % and 5.87 %, respectively. For all parameters, the relative error of predicted values are found to be less than the acceptable limits of 10 %. The goodness of fit of the prediction values from the FES model on cooling efficiency and cooling range are found as 0.960 and 0.987, respectively, which are found to be close to 1.0 as projected. The results indicate that there is less variability of the measured data and predicted data vii of the counter flow induced draft cooling tower with water and with nanofluids in different volume concentration. It also indicates that the predicted data over the measured data has a good agreement and thus substantiates the validity of the mathematical model. In this study, according to assessment principles of predicted performance of the developed fuzzy expert system based intelligent model has been found to be valid. It is an innovative adaption leading to technological capacity building which has a remarkable contribution to enhance the machine life, better-efficient outcome and friendly to the aquatic and environmental system.
INCIDENCE AND CONTROL OF THRIPS TABACI (THYSANOPTERA: THRIPIDAE) ON ONION USING NEEM LEAF EXTRACTS
(HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR., 2016-12) RAHMAN, MD. HABIBUR; Professor Dr. Md. Alamgir Hossain
The experiment was conducted to study the incidence of onion thrips, Thrips tabaci (Lindeman) in field conditions and mortality also tested using three different solvent (acetone, petroleum benzene and distilled water) extracts of neem leaf powder in the laboratory of the Department of Entomology, HSTU, Dinajpur during the period from November, 2015 to April, 2016. Results showed that the highest number of thrips was observed at the end of March, 2016 while the lowest was 3.93 due to heavily rainfall on 29 March, 2016. The average number of nymphs per plant was 4.91 when plant height was 39.49 cm then the number of nymphs increased up to 20.37 when the plant height was 42.78 cm. The maximum number of thrips (20.37) was observed at the end of March, 2016 when the mean number of leaves per plant was 4.11. The number of thrips per plant was negatively correlated with leaves per plant and plant height. Weather parameters (temperature, humidity and rainfall) had great influence on incidence of onion thrips population. In case of temperature, thrips population gradually increased with increasing average temperature at a certain level. On the other hand, thrips population decreased with increasing relative humidity and rainfall (cm). Among the tested extracts, acetone extract of neem leaf powder provided the highest mortality (33.67%) while the extract with distilled water caused the lowest mortality (12.33%). In case of control treatment, no mortality of thrips was found. The lowest LDso values of acetone extract of neem leaf powder at 1, 2, 3, 4 and 5 HAT indicated that acetone extract possessed the highest toxic effects. Acetone extract was highly toxic to nymphs of onion thrips and which provided 100% mortality within 5 hours after exposure. The LT so (h) values of acetone extract (1.56) provided best performance among the tested extract. It is revealed from the results that plant height, number of leaves and weather parameters have influence on incidence of onion thrips population. It is also revealed that acetone extract of neem leaf powder performed well to check the T. tabaci infestation.
INCIDENCE AND CONTROL OF THRIPS TABACI (THYSANOPTERA: THRIPIDAE) ON ONION USING NEEM LEAF EXTRACTS
(HAJEE MOHAMMOD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, 2016-12) RAHMAN, MD. HABIBUR; Professor Dr. Md. Alamgir Hossain
The experiment was conducted to study the incidence of onion thrips, Thrips tabaci (Lindeman) in field conditions and mortality also tested using three different solvent (acetone, petroleum benzene and distilled water) extracts of neem leaf powder in the laboratory of the Department of Entomology, HSTU, Dinajpur during the period from November, 2015 to April, 2016. Results showed that the highest number of thrips was observed at the end of March, 2016 while the lowest was 3.93 due to heavily rainfall on 29 March, 2016. The average number of nymphs per plant was 4.91 when plant height was 39.49 cm then the number of nymphs increased up to 20.37 when the plant height was 42.78 cm. The maximum number of thrips (20.37) was observed at the end of March, 2016 when the mean number of leaves per plant was 4.11. The number of thrips per plant was negatively correlated with leaves per plant and plant height. Weather parameters (temperature, humidity and rainfall) had great influence on incidence of onion thrips population. In case of temperature, thrips population gradually increased with increasing average temperature at a certain level. On the other hand, thrips population decreased with increasing relative humidity and rainfall (cm). Among the tested extracts, acetone extract of neem leaf powder provided the highest mortality (33.67%) while the extract with distilled water caused the lowest mortality (12.33%). In case of control treatment, no mortality of thrips was found. The lowest LDso values of acetone extract of neem leaf powder at 1, 2, 3, 4 and 5 HAT indicated that acetone extract possessed the highest toxic effects. Acetone extract was highly toxic to nymphs of onion thrips and which provided 100% mortality within 5 hours after exposure. The LT so (h) values of acetone extract (1.56) provided best performance among the tested extract. It is revealed from the results that plant height, number of leaves and weather parameters have influence on incidence of onion thrips population. It is also revealed that acetone extract of neem leaf powder performed well to check the T. tabaci infestation.
MANAGEMENT OF FOOT AND ROOT ROT DISEASE OF CHICKPEA (Cicer arietinam)
(Dept. of Plant Pathology, 2017-12) RAHMAN, MD. HABIBUR
MICROPROPAGATION OF SALT TOLERANT EXOTIC POTATO GENOTYPES AND THEIR IN VITRO BIOASSAY
(Department of Biotechnology, Sher-e-Bangla Agricultural University, 2016-12) RAHMAN, MD. HABIBUR
In vitro bioassay of nine exotic potato genotypes namely CIP102, CIP106, CIP111, CIP 117, CIP 120, CIP124, CIP127, CIP 136 and CIP 139 was conducted for salinity tolerance at Tissue Culture Lab, Tuber Crops Research Center (TCRC), Bangladesh Agricultural Research Institute (BARI), Gazipur-1701. Single node and root tip segments of these genotypes were cultured in MS media supplemented with 0.0 (control), 80, 100, 120, 140 and 160 mM NaCl. In case of in vitro shoot bioassay, CIP 139 was found as the most salt tolerant with the highest plant height (9.67 cm), number of nodes (9.50), number of leaves (13.60), number of roots (8.00), length of root (6.50 cm), fresh weight of shoot (509.0 mg) and fresh weight of root (205.60 mg) at 160 mM NaCl (14.61 dSm ). On the other hand, CIP 106 was found as the most salinity sensitive at 120 mM NaCl (10.96 dSm -1 ) producing minimum plant height (7.17 cm), number of nodes (6.50), number of leaves (12.50), number of roots (9.70), length of roots (5.10 cm), fresh weight of shoot (572.3 mg) and fresh weight of root (244.4 mg) followed by CIP 136, CIP 117 and CIP 111 at same salinity level. However, CIP 127, CIP 102 and CIP 124 genotypes showed very good performance up to 140 mM NaCl (12.78 dSm -1 -1 ). In vitro root bioassay also revealed the highest salinity tolerance of CIP 139 up to 160 mM NaCl, CIP 127 and CIP 102 up to 140 mM NaCl as well as CIP 106 up to 120 mM salinity level. The root tips of experimented potato genotypes were not significantly affected up to 120 mM salinity level in comparison with control where CIP 120 was found as the lowest tolerant up to 120 mM salinity level in MS media. Among the 0.0 (control), 0.1, 0.5, 1.0 and 1.5 mg /L IBA concentrations supplemented with MS media 1.0 mg/ L was found best for rooting with early root initiation (6.57 days) and well development (10.48 days), highest root length (8.63 cm), 2 highest root number (17.25) and maximum fresh weight of root (332.22 mg). Interestingly, there was no significant differences between 0.5 and 1.0 mg/L IBA for in vitro root induction and development in the experimented CIP potato genotypes.
RESPONES OF SOME AROMATIC RICE VARIETIES TO SALTSTRESS
(DEPARTMENT OF AGRONOMY, 2015-06) RAHMAN, MD. HABIBUR
A pot experiment with six aman rice varieties viz. BRRI dhan34, BRRI dhan38, Binadhan-9, Binadhan-13, Kalijira and Rajbhogh was conducted at the experimental shed of the Department of Agronomy, Sher-e Bangla Agricultural University, Dhaka during the period of June- December, 2014 to investigate the effect of salinity on the growth, physiology and yield of some aromatic rice under different salt stress condition. The experiment was carried out with five salt stress treatments viz. control (N 0 ), 25 mM (N 25 ), 50 mM (N ), 75 mM (N 75 ) and 100 mM (N ). Salt stresses significantly reduced the plant height and tiller hill -1 100 of six varieties at all growth duration. Leaf relative water content (RWC) and chlorophyll (chl) content also reduced due to salt stress. At harvest, salt stresses reduced the effective tiller hill -1 , number of filled grain panicle -1 , 1000 grain weight, grain yield and straw yield of six varieties. Binadhan-9 and BRRI dhan38 performed better under saline condition. On the other hand, local variety Kalijira did not perform well under saline condition. 50
RESPONSE OF TOMATO TO DIFFERENT PLANT GROWTH REGULATORS
(DEPARTMENT OF AGRICULTURAL BOTANY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY , DHAKA -1207, 2018-06) RAHMAN, MD. HABIBUR
An experiment was carried out at the research farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2017 to March 2018 to study the response of tomato to different plant growth regulators. The experiment consisted of seven (7) treatments viz. (1) T = Control, (2) T 2 = 20 ppm Gibberellic Acid (GA 3 ), (3) T = 100 μM Salicylic Acid (SA), (4) T 4 = 10 μM Methyl Jasmonate (MeJA), (5) T 3 5 = 20 ppm GA + 100 μM SA, (6) T 6 = 20 ppm GA 3 + 10 μM MeJA and (7) T = 100 μM SA + 10 μM MeJA. The experiment was laid out in Randomized Complete Block Design (RCBD) with five replications. Results revealed that the treatment, T 7 (20 ppm GA ) showed the highest plant height (81.63 cm) but the highest number of leaves plant 3 -1 (53.58) and SPAD value (53.08) were obtained from the treatment, T 6 (20 ppm GA + 10 μM MeJA) at 65 days after transplanting (DAT).The lowest values of this parameter were found with control (T 3 ) treatment. The highest numbers of flower cluster -1 (6.78), number of fruits cluster -1 (4.54) were observed from the treatment, T 5 (20 ppm GA + 100 μM SA). Separately, the highest number of flower cluster plant (9.77), fruit diameter (15.02 cm), single fruit weight (51.86 g), number of fruits plant (36.40), fruit weight plant -1 (kg) (1.90 kg), fruit weight plot -1 (16.76 kg) and fruit yield ha -1 (69.85 t) were found from the treatment, T 6 -1 3 (20 ppm GA + 10 μM MeJA). The lowest number of flower clusters plant -1 (6.75), number of flower cluster -1 (5.55), fruit length (7.63 cm) and fruit diameter (11.70 cm), number of fruits plant -1 (30.25), fruit weight plant -1 (1.56 kg), fruit weight plot (13.91 kg) and fruit yield ha -1 (57.94 t) were observed from the treatment, T (Control). Therefore, these experimental results concluded that GA along with MeJA gave the highest fruit yield of tomato than sole application of GA or together application of GA along with SA under the edaphic and climatic conditions of Sher-e-Bangla Agricultural University (SAU). 3 3 3 1 3 3 1 2 -1 -1 1
Soil carbon pools and dynamics in the Sal forests of Bangladesh
(© University of Dhaka, 2026-04-20) RAHMAN, MD. HABIBUR
Carbon (C) concentrations in different Sal forests of Bangladesh have not yet been estimated to explore their C storage potential. The present study compared the C pools among three selected Sal forests located in Madhupur, Lalmai and Singra to examine the effect of management intensity on C stocks. A total of 19 plots (each 10 m × 10 m for tree, 5 m × 5 m for shrubs and 0.5 m × 0.5m for herbs in size), 9 from Madhupur forest and each 5 from the other two forests, were established to collect data on plant composition, plant DBH and organic C concentrations. Allometric method was used to estimate C concentrations for both aboveground and belowground parts of juvenile and adult tree plants of the selected plots. Wood biomass was converted to C content by multiplying the value with the van Bemelen factor (1.724). Litter biomass C, soil organic C and fine root C were determined during winter (December) and summer (May) of 2016. Seasonal variation in culturable soil bacterial colony counts was also studied in three replicated plots selected from Madhupur Sal forest. The results showed that woody C concentration was significantly (p = 0.0156) higher in Lalmai (552.46±64.09 t/ha) and Singra forests (547.13±62.43 t/ha) than in Madhupur Sal forest (354.03±38.43 t/ha). The mean DBH of Sal tree at breast height was significantly (p = 0.022) higher in Lalmai (38.84±2.12 cm) and Singra (37.36±1.97 cm) forests than in Madhupur forest (30.72±1.93 cm). On the other hand, fine root C and soil C were determined at three different depths: 0-10 cm, 10-20 cm and 20-30 cm. The litter and fine root dry biomass were converted to C content and expressed as tonnes C per hectare area. Soil C content was calculated using the bulk density method. The decomposition of Sal leaf litter and seasonal changes in bacterial communities were studied to explain the observed temporal changes in biomass C content in the study area. The decomposition rate (mass loss and N mineralization rate) of Sal leaf litter was studied by incubating leaf litter with soil collected from three selected Sal forests following a reciprocal experimental design where each Sal leaf litter was incubated with soil collected from three Sal forests. The number of bacterial colonies was compared in summer, monsoon, late autumn and winter seasons in a plot of Madhupur Sal forest. Litter biomass C was significantly higher in May compared to December, although the effect of forest was not significant. Fine root biomass C was significantly affected by forest type (p < 0.0001) and depth (p < 0.0001) where the maximum amount was found in Madhupur sal forest and the lowest in Lalmai Sal forest and 0-10 cm depth showed the highest value among the three selected Sal forests. Soil C content was significantly affected by both forest type (p < 0.0001) and depth (p < 0.05) where the value was higher in Singra National Park, followed by Madhupur Sal forest and Lalmai Sal forest, however, the highest value was recorded at 10 cm depth, followed by 20 cm and 30 cm depth. Nitrogen mineralization rate was significantly affected by soil type and the mean value was higher in Lalmai Sal forest. For fast-growing bacteria, the number of small- sized colonies was higher in late autumn but lower in winter, while the number of large-sized colonies was higher in winter but lower in late autumn. For slow-growing bacteria, the number of smallsized colonies was higher in late autumn but lower in winter, while the number of large-sized colonies was higher in winter but lower in late autumn. This study suggests that long-term forest conservation may be an effective method for increasing C stocks in forest ecosystems. Result also suggest to consider assessment of C stocks of temporal scale for more accurate estimation of C dynamics.
STUDENT RESULT PREDICTION USING DATA MINING TECHNIQUE
(Daffodil International University, 2018-11-03) ISLAM, MD.MARUF; RAHMAN, MD. HABIBUR
The intent of the research paper is to presents a brief review of the use of a large amount of student data that was kept by the educational institutions. Using the data mining technique student result can be predicted from these data. The purpose of this research paper is to provide an overview of how an educational institution can predict the student result, what tools are used on this purpose, what kind of data is needed for the prediction, how students can visualize their current progress and also can see their predicted result. Finally, this paper will propose a recommended system for the students and the institutions to improve the student progress depending on some specific data such as, predict the student final grade depending on the student’s assignment, presentation, attendance, quiz, mid, final mark on a particular subject and suggested some predictive modeling such as Decision tree, Naïve Bayes. Compare the predictive modeling with each other and also find out the impact the various variable in student result prediction.
SURVEY AND MOLECULAR DETECTION OF FRUIT FLY SPECIES OF GUAVA IN BANGLADESH AND ITS INTEGRATED MANAGEMENT
(DEPARTMENT OF ENTOMOLOGY, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, SHER-E-BANGLA NAGAR, DHAKA-1207, BANGLADESH, 2021-06) RAHMAN, MD. HABIBUR
Fruit fly is one of the major insect pests of fruits and vegetables in the world. Fruit flies belong to the family Tephritidae (Order: Diptera) are considered as a very destructive group of insects that cause enormous economic losses in agriculture, especially in a wide variety of fruits, vegetables, and flowers. The identification and management of fruit flies in guava orchard is complex and complicated. The purpose of this study was morphological identification, molecular detection of the most invasive species of fruit flies attacking the vulnerable stage of guava fruit and their management with some promising control options. A survey was conducted at four intensive guava growing regions of Bangladesh (North, Central, South & Hill tracts) to evaluate the extent of infestation of fruit flies, losses due to its infestations, farmer’s interest, and management of fruit fly. It revealed that more than 90 percent farmers were young, and 27 percent landless farmers were involved in guava farming at surveyed locations. However, female farmers involvement was comparatively low. Most popular guava variety was Thai payara and 31 percent area was covered by this promising variety. Other two popular local varieties were viz., Shorupkati and kanchannagar. Almost 20-25 percent yield loss was reported due to fruit fly attack. Fruit fly infestation was observed at ninety seven percent guava orchards in different surveyed locations. Guava farmers mainly used polybag to reduce the fruit fly infestation. Eighty-five percent guava farmer usually practiced trap with pheromone and polybag simultaneously. In morphometric study, examined the species identification of fruit flies infesting guava in Bangladesh. Oriental fruit fly (Bactrocera dorsalis Hendel) was found as the major species which covered seventy eight percent of total fruit fly population and other species were melon fly (Zeugodacus cucurbitae), pumpkin fruit fly (Zeugodacus tau), peach fruit fly (Bactrocera zonata) and. Dacus longnicornis. Data analyses based on five fruit fly taxa revealed moderate performance of this genetic marker COI. BLAST analysis revealed that the observed species showed 98-100% homology with the sequence of Bactrocera dorsalis, Zeugodacus cucurbitae, Zeugodacus tau, Bactrocera zonata and Dacus longnicornis, respectively. Present study investigated the population genetic diversity and structure of 35 populations and haplotype distribution of fruit fly in Bangladesh sampled throughout 12 geographical populations. The population genetic diversity and haplotype distribution study results revealed low genetic diversity of fruit fly of four different species in sampled areas. Significantly negative departures from zero for Tajima’s D neutrality tests values also support population expansions. To find out the effective and sustainable management technique to improve the guava production by reducing the fruit fly infestation, a study was conducted at on-station and Farmers’ field of Savar and Gazipur of Dhaka district and Sher-e-Bangla Agricultural University for testing and rearing the collected sample. Tretment T (Wrapping of twig and fruits with micro nets) showed the higher level of mean number 129.67 of healthy fruit and weight 42.79 g of healthy fruits but the lowest number reduction over control per fruit was obtained from wrapping of twig and fruits with micro nets treated plot. The total fruit yield 34.23 t/ha was significantly higher in the plots treated with the components of T viii 4 which was statistically similar to Male Annihilation Technique (MAT).
THE INFLUENCE OF PLANT AGE ON THE INCIDENCE OFRED RUST (Cephaleuros parasiticus karst.) OF TEA
(Dept. of Plant Pathology and Seed Science, 2013-12) RAHMAN, MD. HABIBUR
An experiment was conducted on red rust disease of tea in different tea estate of Sylhet region. The survey area included Bangladesh Tea Research Institute (BTRI) farm at Srimangal in Moulvibazar district, Ghazipore Tea Estate in Kulaura, Marina Tea Estate in Kulaura, Bejoya Tea Estate in Kulaura, Baraoorah Tea Estate in Srimangal, Moulvibazar district, Lackatora Tea Estate in Sylhet, Malnichora Tea Estate in Sylhet, Burjan Tea Estate in Sylhet, Momenchora Tea Estate in Sylhet district and Chundeeche Tea Estate in Habiganj district. The experiment was conducted during April to July 2013. The objective of the study was to investigate the effect of age on the incidence and severity of red rust. Variation was observed among different estate on the incidence and severity of red rust caused by the algal pathogen Cephaleuros parasiticus. Comparatively higher disease incidence and severity was observed in mature plants as compared to young plants. Disease incidence in mature plants varied from 74 to 94% with the average disease incidence in mature plants was 86.16%. Where incidence in younger plants varied from 70 to 91%. The average disease incidence in younger plant was 81.13%.The highest amount of Red rust was observed in Lackatoorah tea estate. The variation in disease incidence and severity was not significant in all cases.
USE OF ICT BY THE FISHERMEN FOR FISH FARM MANAGEMENT IN SELECTED AREAS OF DAUDKANDI UPAZILLA UNDER CUMILLA DISTRICT
(DEPARTMENT OF AGRICULTURAL EXTENSION AND INFORMATION SYSTEM, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2020-12) RAHMAN, MD. HABIBUR
ABSTRACT The study was conducted to determine the extent of use of ICT by the fishermen for fish farm management, to determine the extent to which the selected factors influence fish farmer’s use of ICT for fish farm management and to identify the barriers are faced by the fish farmers in using ICT tools for fish farm management in selected areas of Daudkandi upazilla under Cumilla district. Two unions namely Baro para and Gouripur of Daudkandi upazilla were randomly selected as research area under Cumilla district. Data were collected from 103 randomly selected fish farmers from the study areas, through personal interview by the researcher himself during October 25 to November 25, 2020. Data were analyzed by Multiple Regression analysis using SPSS 25.0. Age, education, fish farm size, fish farming experience, communication exposure, fisheries training received, ICT possession, usefulness of use ICT tools were the selected variables for the study. Data indicates that that majority of the respondents’ (38.8%) use of various ICT were found less while one-third of them 33% use moderately. A little more than one-fourth of the respondents (28.2%) use ICT tools for fish farm management. Majority (86.4%) of the fish farmers in the study area were of middle to young aged This study found that middle to young aged fish farmers is more interested and engaged in fish farming and their high use of ICT in fish farming. (63.1%) of the fish farmers’ education level varied from primary to secondary levels. Thus, it can be said that the high education level, more interested and used of ICT for fish farming. Concerning the barrier, ‘high cost of ICT tools’ was most frequently reported by fish farmers followed by ‘lack of ICT training and ICT infrastructure. Findings revealed that, level of education, communication exposure and ICT possession had positive and significant contribution to the use of ICT for fish farm management which constitutes 67.4% (R 2 = 0.674) of the variances. Thus, the study concludes with the recommendation to enable favorable environment to promote use of ICT tools in receiving fish farming information.