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Dr. Chayan Kumer Saha is a Professor at the Department of Farm Power and Machinery, Bangladesh Agricultural University, Bangladesh where he has been involved in teaching & research for last twenty years. He graduated from Bangladesh Agricultural University, with BSc Agricultural Engineering in 2000. He earned two master’s degree; one in MS in Farm Power and Machinery from Bangladesh Agricultural University, Bangladesh and other in MSc in Agricultural & Bioresource Engineering with Nuffic scholarship from Wageningen University and Research Center (WUR), the Netherlands. He earned his PhD in Environmental Technology from Aarhus University, Denmark and completed his post-doc research under the Department of Engineering for Livestock Management, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany with Alexander von Humboldt fellowship. He was a visiting scholar in Asian Institute of Technology (AIT), Thailand and Purdue Agricultural Air Quality Laboratory, Purdue University, USA. He received Global Research Impact Award 2019 & 2020 consecutively, in recognition of outstanding global research impact by Bangladesh Agricultural University Research System (BAURES), Bangladesh. He is a life member of Institute of Engineers- Bangladesh, Bangladesh Biogas Development Foundation (BBDF) & Bangladesh Society of Safe Food (BSSF) and member of American Society of Agricultural & Biological Engineers (ASABE) & United Kingdom of Controlled Environment User’s Group.
To reduce human drudgery and the risk of labor shortages in the Asian developing countries, the appropriate introduction of agricultural machinery, especially combine harvesters, is an urgent task. Custom hiring services (CHSs) are expected to contribute to making paddy harvesters prevalent in developing countries; however, the economic performance has been rarely quantified. The study was carried out to precisely evaluate the machine performance attributes of medium and large combine harvesters using the real-time kinematic (RTK) global navigation satellite system (GNSS) and to estimate the economic performance of CHSs of paddy harvesters in Japan, as a typical case of Asian countries. The financial profitability was evaluated by four major indicators: net present value, benefit–cost ratio, internal rate of return, and payback period. The financial indicators showed that both types of harvester could be considered financially viable. Thus, the investment in combine harvesters can be highly profitable for CHS business by a local service provider and custom-hire entrepreneur, providing a great opportunity to use a combine harvester without initial investment by general farmers. The findings demonstrated the high feasibility of CHSs of paddy harvesters in Japan, while they highlighted that further study is needed to estimate the feasibility of CHS in the other Asian developing countries.
Kamrul Hasan; Takashi Tanaka; Rostom Ali; Chayan Saha; Monjurul Alam. Harvester Evaluation Using Real-Time Kinematic GNSS and Hiring Service Model. AgriEngineering 2021, 3, 363 -382.
AMA StyleKamrul Hasan, Takashi Tanaka, Rostom Ali, Chayan Saha, Monjurul Alam. Harvester Evaluation Using Real-Time Kinematic GNSS and Hiring Service Model. AgriEngineering. 2021; 3 (2):363-382.
Chicago/Turabian StyleKamrul Hasan; Takashi Tanaka; Rostom Ali; Chayan Saha; Monjurul Alam. 2021. "Harvester Evaluation Using Real-Time Kinematic GNSS and Hiring Service Model." AgriEngineering 3, no. 2: 363-382.
Converting organic waste into energy through anaerobic digestion is gaining popularity day by day. The reactor temperature is considered as one of the most vital factors for the digestion process. An experiment was conducted in the Biogas Laboratory of Green Energy Knowledge Hub at Bangladesh Agricultural University (BAU) to examine the influence of temperature on anaerobic digestion of cow-dung. Laboratory-scale continuous stirred tank reactors with a working volume of 15 L were operated for a 30-day retention time. The reactors were set at 20 °C, 25 °C, 30 °C, 35 °C, 40 °C and 45 °C, respectively to determine the effect of temperature on anaerobic digestion performance. Different parameters like total solids, volatile solids, pH, volatile fatty acids, ammonia nitrogen, total nitrogen, biogas production rate and methane concentration were examined. Among all the reactors, the reactor at 40 °C temperature produced maximum biogas (312.43 L/kg VS) and methane yields (209.70 L/kg VS), followed by the reactors at 35 °C and 30 °C, respectively. Statistical analysis of the obtained experimental results using Minitab® (State College, PA, USA) showed that the optimum process performance in terms of methane yield and volatile solid degradation is achieved at a reactor temperature of 35.82 °C.
Rajesh Nandi; Chayan Kumer Saha; Shiplu Sarker; Sanaul Huda; Monjurul Alam. Optimization of Reactor Temperature for Continuous Anaerobic Digestion of Cow Manure: Bangladesh Perspective. Sustainability 2020, 12, 8772 .
AMA StyleRajesh Nandi, Chayan Kumer Saha, Shiplu Sarker, Sanaul Huda, Monjurul Alam. Optimization of Reactor Temperature for Continuous Anaerobic Digestion of Cow Manure: Bangladesh Perspective. Sustainability. 2020; 12 (21):8772.
Chicago/Turabian StyleRajesh Nandi; Chayan Kumer Saha; Shiplu Sarker; Sanaul Huda; Monjurul Alam. 2020. "Optimization of Reactor Temperature for Continuous Anaerobic Digestion of Cow Manure: Bangladesh Perspective." Sustainability 12, no. 21: 8772.
Airflow inside naturally ventilated dairy (NVD) buildings is highly variable and difficult to understand due to the lack of precious measuring techniques with the existing methods. Computational fluid dynamics (CFD) was applied to investigate the effect of different seasonal opening combinations of an NVD building on airflow patterns and airflow rate inside the NVD building as an alternative to full scale and scale model experiments. ANSYS 2019R2 was used for creating model geometry, meshing, and simulation. Eight ventilation opening combinations and 10 different reference air velocities were used for the series of simulation. The data measured in a large boundary layer wind tunnel using a 1:100 scale model of the NVD building was used for CFD model validation. The results show that CFD using standard k-ε turbulence model was capable of simulating airflow in and outside of the NVD building. Airflow patterns were different for different opening scenarios at the same external wind speed, which may affect cow comfort and gaseous emissions. Guiding inlet air by controlling openings may ensure animal comfort and minimize emissions. Non-isothermal and transient simulations of NVD buildings should be carried out for better understanding of airflow patterns.
Chayan Kumer Saha; Qianying Yi; David Janke; Sabrina Hempel; Barbara Amon; Thomas Amon. Opening Size Effects on Airflow Pattern and Airflow Rate of a Naturally Ventilated Dairy Building—A CFD Study. Applied Sciences 2020, 10, 6054 .
AMA StyleChayan Kumer Saha, Qianying Yi, David Janke, Sabrina Hempel, Barbara Amon, Thomas Amon. Opening Size Effects on Airflow Pattern and Airflow Rate of a Naturally Ventilated Dairy Building—A CFD Study. Applied Sciences. 2020; 10 (17):6054.
Chicago/Turabian StyleChayan Kumer Saha; Qianying Yi; David Janke; Sabrina Hempel; Barbara Amon; Thomas Amon. 2020. "Opening Size Effects on Airflow Pattern and Airflow Rate of a Naturally Ventilated Dairy Building—A CFD Study." Applied Sciences 10, no. 17: 6054.
Southern Delta of Bangladesh is lagging behind in adoption of agricultural machinery due to its agro-ecological characteristics in contrast with the rest of the country. Agriculture in this region is characterized by low productivity due to salinity, water logging, limiteduse of modern technologies, inadequate control over water resources and repeated crop losses due to natural calamities like cyclone, tidal surge, flood, etc. Harvesting is one of the areas that need machinery intervention for reduction of cost, time and losses. Three types of harvesting machines namely reaper, mini-combine and small to medium size combine harvesters are available options for paddy harvesting in Bangladesh. The main objective of the study was to identify appropriate paddy harvesting machines forsouthern delta of Bangladesh. The experiments were conducted to evaluate the technical and economic performances of reaper (Model: Vikyno AR 120), mini combine harvester (Model: 4LBZ-110) and combine harvester (Model-AG600GA) in compared to manual harvesting of paddy. The result shows that effective field capacity of the combine harvester was 0.45 ha/h in comparison to reaper (0.22 ha/h) and mini-combine harvester (0.09 ha/h). Cost savings of combine harvester was 61% over manual harvesting compared to reaper (45%) and mini-combine harvester (51%). Similarly, combine harvester saves 70% labor over manual harvesting. The estimated BCR (Benefit Cost Ratio) and pay-back period of combine harvester were 1.62 and 2.08 year, respectively. The average total harvesting loss of combine harvester was found 1.62% which was significantly less than manual harvesting (6.36%). In addition to this, harvesting of 100% shattered paddy, even in water logged and wet conditions are possible by combine harvester. But, reaper and mini-combine harvester cannot harvest paddy in such conditions. Due to climate prone vulnerability, it is also necessary to harvest large area of paddy within short time. Therefore, combine harvester would be an appropriate option for harvesting paddy in southern delta of Bangladesh. Based on these findings, the government of Bangladesh comes up with a program to popularize three thousand units small to medium size combine harvester and two thousands units of reaper with 60% subsidy in the country by 2020-21 fiscal year.
Kamrul Hasan; Rostom Ali; Chayan Saha; Monjurul Alam. Sustainable Paddy Harvesting Solution for the Southern Delta of Bangladesh. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 2020, 1 .
AMA StyleKamrul Hasan, Rostom Ali, Chayan Saha, Monjurul Alam. Sustainable Paddy Harvesting Solution for the Southern Delta of Bangladesh. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020. 2020; ():1.
Chicago/Turabian StyleKamrul Hasan; Rostom Ali; Chayan Saha; Monjurul Alam. 2020. "Sustainable Paddy Harvesting Solution for the Southern Delta of Bangladesh." 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 , no. : 1.
Agricultural mechanization in southern delta of Bangladesh is lagging behind in comparison to rest of the country due to soil salinity, natural disaster like cyclone, tidal surge etc. Introduction of mechanical rice transplanting in this region is necessary for reducing labor, time and cost ofcrop production, thereby increasing cropping intensity and yield. Field experiments were conducted by the Feed the Future and USAID, USA sponsored project “Appropriate Scale Mechanization Innovation Hub (ASMIH)-Bangladesh” during 2017 to 2019 in Aman and Boro seasons at Dumuria, Wazirpur, Subarnachar and Kalapara Upazilas of Khulna, Barishal, Noakhali and Patuakhali districts, respectively located in the southern delta of Bangladesh. The mechanical rice transplanter was found technically suitable in the above mentioned areas. Custom hiring service provision of mechanical rice transplanter to farmers was identified as one of the viable options. However, financial viability of the provision needs to be assessed. At this end, FAO developed RuralInvest tool was used. The RuralInvest is a financial decision making software developed by FAO to assess the sustainability of rural invest projects. The duration of the custom hiring service project was considered 6 years with farmer‘s own investment, where the direct beneficiarywas1 entrepreneur family and indirect beneficiaries were 40 farm families. The annual inflation rate was considered as 6%.The result showed that the internal rate of return (IRR), net present value (NPV) and payback period of rice transplanter custom hiring service provision were 34.20%, USD 6071 and 2.47 years, respectively. The NPV indicates that custom hiring service provider of the machine can havepositive return and the project is said financially viable because IRR (34.2%) of rice transplanter custom hiring service provision was greater than the bank interest rate (9%). Therefore, the rice transplanter custom hiring service provision would have been a viable and sustainable business propositionfor the existing and potential custom hiring service providers in the southern delta of Bangladesh.
Surajit Sarkar; Ashik- E- Rabbani; Chayan Saha; Monjurul Alam. Assessment of Custom HiringService Provision for Rice Transplanter in the Southern Delta of Bangladesh using RuralInvest Tool. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 2020, 1 .
AMA StyleSurajit Sarkar, Ashik- E- Rabbani, Chayan Saha, Monjurul Alam. Assessment of Custom HiringService Provision for Rice Transplanter in the Southern Delta of Bangladesh using RuralInvest Tool. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020. 2020; ():1.
Chicago/Turabian StyleSurajit Sarkar; Ashik- E- Rabbani; Chayan Saha; Monjurul Alam. 2020. "Assessment of Custom HiringService Provision for Rice Transplanter in the Southern Delta of Bangladesh using RuralInvest Tool." 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 , no. : 1.
Drying is an essential post-harvest operation before storing and processing of paddy. Delayed drying incurs post-harvest and quality losses of paddy. BAU-STR dryer using rice husk briquette as a heat source was developed earlier by the Feed the Future, USAID and ADMI, University of Illinois at Urbana-Champaign, USA sponsored Post Harvest Loss Reduction Innovation Lab (PHLIL)-Bangladesh project to overcome the problems. LPG (Liquefied Petroleum Gas) is a clean gas which is available in all over Bangladesh and could be a clean and easy source of producing hot air for BAU-STR dryer. The objective of this study was to develop LPG based heating system and conduct technical and economical performances of BAU-STR dryer. The experiment was conducted during 25 November, 2019 to 11 December, 2019 (Aman season) at the workshop of the Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh. Paddy variety BRRI dhan49 was collected from the BAU farm to conduct the experiment. LPG heating system was developed for BAU-STR dryer using locally available LPG cylinder and burner incorporated in modified local stove. The dryer performance was evaluated by setting two different heating units (rice husk briquette and LPG based) and two blowers (Vietnamese and locally manufactured blowers) combination. Treatment 1 (T1), treatment 2 (T2) and treatment 3 (T3) were briquette plus locally manufactured blower, LPG plus Vietnamese blower, and LPG plus locally manufactured blower, respectively for the study. Each treatment was repeated for 3 times. The temperature was maintained at 42±0.5˚C for drying paddy. The moisture removal rate was found 2%MC/hr, 2%MC/hr and 2.1%MC/hr for T1, T2 and T3, respectively. The drying efficiency was found 53.92±1.58%, 64.11±2.9% and 68.97±0.38% for T1, T2 and T3, respectively. The operating cost was estimated 0.78 BDT/kg, 1.13 BDT/kg and 0.89 BDT/kg for T1, T2 and T3, respectively. Average milling recovery was 75.54±1.92%, 75.99±1.44% and 75.51±1.12% for T1, T2 and T3, respectively. It is evident from the technical, financial and milling quality analyses that the BAU-STR dryer using LPG as a clean heating source with locally manufactured blower would be best option for the farmers, seed producers and small traders in Bangladesh.
Chayan Saha; A.S.M. Younus Bhuiyan Sabbir; Surajit Sarker; Monjurul Alam. Development and Evaluation of LPG Based Heating System for BAU-STR Dryer. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 2020, 1 .
AMA StyleChayan Saha, A.S.M. Younus Bhuiyan Sabbir, Surajit Sarker, Monjurul Alam. Development and Evaluation of LPG Based Heating System for BAU-STR Dryer. 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020. 2020; ():1.
Chicago/Turabian StyleChayan Saha; A.S.M. Younus Bhuiyan Sabbir; Surajit Sarker; Monjurul Alam. 2020. "Development and Evaluation of LPG Based Heating System for BAU-STR Dryer." 2020 ASABE Annual International Virtual Meeting, July 13-15, 2020 , no. : 1.
Anisur Rahman; Chayan Saha; Lu Feng; Henrik B. Møller; Monjurul Alam. Anaerobic digestion of agro-industrial wastes of Bangladesh: Influence of total solids content. Engineering in Agriculture, Environment and Food 2019, 12, 484 -493.
AMA StyleAnisur Rahman, Chayan Saha, Lu Feng, Henrik B. Møller, Monjurul Alam. Anaerobic digestion of agro-industrial wastes of Bangladesh: Influence of total solids content. Engineering in Agriculture, Environment and Food. 2019; 12 (4):484-493.
Chicago/Turabian StyleAnisur Rahman; Chayan Saha; Lu Feng; Henrik B. Møller; Monjurul Alam. 2019. "Anaerobic digestion of agro-industrial wastes of Bangladesh: Influence of total solids content." Engineering in Agriculture, Environment and Food 12, no. 4: 484-493.
Press mud (PM), generated from sugar mills, and poultry droppings (PD) are treated as waste materials and may be a solution for a country’s energy deficit in that their anaerobic co-digestion can produce high-value bio-energy in the form of biogas. Both a batch experiment and continuous experiments in continuous stirred tank reactor (CSTR) were conducted to determine the optimal temperature from the mesophilic temperature regimes in terms of methane yield. Also studied was the variability of other major parameters at varying temperatures with co-digestion of PM and PD in microbial consortia. The average highest ultimate methane yield and specific methane yields were 325 and 260 normalized litre per kg volatile solids (NL kg−1 VS) for the batch and continuous experiments, respectively. The maximum average specific methane yields were obtained at 35–45 °C, as expected, but yields did not differ significantly. The rate of methane production was relatively lower at temperatures of less than 35 °C and significant yield differences were found among temperatures of 35, 30, 25 and 20 °C. The results show that the temperature influenced the anaerobic digestion performance significantly. The optimum temperature was predicted using MINITAB-18 software according to the best-fit regression models, and modeling showed the optimal temperature was 44 °C.
Anisur Rahman; Henrik B. Møller; Chayan Saha; Monjurul Alam. The effect of temperature on the anaerobic co-digestion of poultry droppings and sugar mill press mud. Biofuels 2019, 1 -9.
AMA StyleAnisur Rahman, Henrik B. Møller, Chayan Saha, Monjurul Alam. The effect of temperature on the anaerobic co-digestion of poultry droppings and sugar mill press mud. Biofuels. 2019; ():1-9.
Chicago/Turabian StyleAnisur Rahman; Henrik B. Møller; Chayan Saha; Monjurul Alam. 2019. "The effect of temperature on the anaerobic co-digestion of poultry droppings and sugar mill press mud." Biofuels , no. : 1-9.
Batch assays were performed under a stressed condition during the anaerobic digestion process to assess the effect of component proportions on the quantity and pattern of biochemical methane yield of two sets of mixtures, consisting of poultry droppings (PD) with sugarcane bagasse (SB) and press mud (PM) for set A and PD with sugar beet roots and tops (SBRT) and PM for set B. Augmented simplex centroid design was used to design the mixture composition for the anaerobic co digestion. The reactor performances were assessed under identical conditions using cumulative methane yield (CMY) and percentage volatile solids destruction (PVSD) as the criteria. The maximum volume of methane were obtained 48.5 NL CH4 kg−1 VS at mixture proportion of 66.67% of PM, 16.665% of PD and 16.665% of SB for set A and 44 NL CH4 kg−1 VS at mixture proportion of 50% of PM and 50% of PD for set B. Synergistic effect were observed by adding a greater proportion of PM for both the sets of A and B. Antagonistic effect were obtained by adding a greater proportion of SB for set A and a higher proportion of SBRT for set B. Response surface methods and modeling were used to find out optimum mixture combinations for maximizing the methane production. From the optimization plots, the use of PD having the antagonistic effect was found for both the sets of A and set B.
Anisur Rahman; Chayan Saha; Alastair James Ward; Henrik Bjarne Møller; Monjurul Alam. Anaerobic co-digestions of agro-industrial waste blends using mixture design. Biomass and Bioenergy 2019, 122, 156 -164.
AMA StyleAnisur Rahman, Chayan Saha, Alastair James Ward, Henrik Bjarne Møller, Monjurul Alam. Anaerobic co-digestions of agro-industrial waste blends using mixture design. Biomass and Bioenergy. 2019; 122 ():156-164.
Chicago/Turabian StyleAnisur Rahman; Chayan Saha; Alastair James Ward; Henrik Bjarne Møller; Monjurul Alam. 2019. "Anaerobic co-digestions of agro-industrial waste blends using mixture design." Biomass and Bioenergy 122, no. : 156-164.
The study was aimed to isolate, identify, and characterize common indicator bacteria, including Escherichia coli, Salmonella spp., and Staphylococcus spp. in manure and bio-slurry samples of different livestock farms and biogas plants of Bangladesh. A total of 114 samples of manure and bio-slurry were collected from different livestock farms and biogas plants in Bangladesh. The total viable count (TVC), E. coli, Salmonella spp., and Staphylococcus spp. counts were determined by the spread plate technique method. Isolation and identification were performed by colony characteristics, staining, biochemical tests, and, finally, by using PCR. Antibiotic susceptibility test of the isolated bacteria was tested against commonly used antibiotics by using the disk diffusion method. The mean TVC, E. coli, Salmonella spp., and Staphylococcus spp. counts were ranged from 8.19-10.75, 5.2-6.96, 5.81-6.87, 5.68-7.68 in manure samples and 7.26-8.65, 3.82-5.2, 4-5.54, 3.14-5.9 log cfu/gm in bio-slurry, respectively. In anaerobic digester after 30 days digestion, the presence of E. coli, Salmonella spp., and Staphylococcus spp. varied from 0-5.11, 0-4.84, and 0-5.59 log cfu/gm at 25°C, 27°C, 29°C, and 45°C temperature. Above-mentioned bacteria were absent in bio-slurry collected from anaerobic digester after 60 days digestion at environmental temperature. Bacterial counts were reduced significantly in both household slurry pits and experimental anaerobic digester. Antibiotic susceptibility results revealed that multidrug-resistant indicator bacteria were present in the bio-slurry samples. Our findings conclude that the microbial load after treatment of animal manure via anaerobic digestion (Biogas plant) was grossly reduced and the reduction of bacterial pathogen depends on the duration and temperature of digestion.
Ashraful Islam; Proteek Biswas; Abdullah Al Momen Sabuj; Zobayda Farzana Haque; Chayan Saha; Monjurul Alam; Tanvir Rahman; Sukumar Saha. Microbial load in bio-slurry from different biogas plants in Bangladesh. Journal of Advanced Veterinary and Animal Research 2019, 6, 376 -383.
AMA StyleAshraful Islam, Proteek Biswas, Abdullah Al Momen Sabuj, Zobayda Farzana Haque, Chayan Saha, Monjurul Alam, Tanvir Rahman, Sukumar Saha. Microbial load in bio-slurry from different biogas plants in Bangladesh. Journal of Advanced Veterinary and Animal Research. 2019; 6 (3):376-383.
Chicago/Turabian StyleAshraful Islam; Proteek Biswas; Abdullah Al Momen Sabuj; Zobayda Farzana Haque; Chayan Saha; Monjurul Alam; Tanvir Rahman; Sukumar Saha. 2019. "Microbial load in bio-slurry from different biogas plants in Bangladesh." Journal of Advanced Veterinary and Animal Research 6, no. 3: 376-383.
Surajit Sarkar; Samiul Basir; Mosharraf Hossain; Chayan Saha; Monjurul Alam; Prasanta Kumar Kalita; Alan C. Hansen C. Hansen. Determination of seed rate for mechanical transplanting of hybrid paddy variety in Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019 2019, 1 .
AMA StyleSurajit Sarkar, Samiul Basir, Mosharraf Hossain, Chayan Saha, Monjurul Alam, Prasanta Kumar Kalita, Alan C. Hansen C. Hansen. Determination of seed rate for mechanical transplanting of hybrid paddy variety in Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019. 2019; ():1.
Chicago/Turabian StyleSurajit Sarkar; Samiul Basir; Mosharraf Hossain; Chayan Saha; Monjurul Alam; Prasanta Kumar Kalita; Alan C. Hansen C. Hansen. 2019. "Determination of seed rate for mechanical transplanting of hybrid paddy variety in Bangladesh." 2019 Boston, Massachusetts July 7- July 10, 2019 , no. : 1.
M A Mottaliba; M A Hossainb; M I Hossainc; M N Aminb; Chayan Saha; M M Alamc. Techno-economic performance of conservation agriculture machinery for planting soybean in the south east coastal region of Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019 2019, 1 .
AMA StyleM A Mottaliba, M A Hossainb, M I Hossainc, M N Aminb, Chayan Saha, M M Alamc. Techno-economic performance of conservation agriculture machinery for planting soybean in the south east coastal region of Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019. 2019; ():1.
Chicago/Turabian StyleM A Mottaliba; M A Hossainb; M I Hossainc; M N Aminb; Chayan Saha; M M Alamc. 2019. "Techno-economic performance of conservation agriculture machinery for planting soybean in the south east coastal region of Bangladesh." 2019 Boston, Massachusetts July 7- July 10, 2019 , no. : 1.
Rostom Ali; Kamrul Hasan; Chayan Saha; Monjurul Alam. Losses of Paddy in Harvesting Practices in Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019 2019, 1 .
AMA StyleRostom Ali, Kamrul Hasan, Chayan Saha, Monjurul Alam. Losses of Paddy in Harvesting Practices in Bangladesh. 2019 Boston, Massachusetts July 7- July 10, 2019. 2019; ():1.
Chicago/Turabian StyleRostom Ali; Kamrul Hasan; Chayan Saha; Monjurul Alam. 2019. "Losses of Paddy in Harvesting Practices in Bangladesh." 2019 Boston, Massachusetts July 7- July 10, 2019 , no. : 1.
Anisur Rahman; Henrik Møller; Chayan Kumer Saha; Monjurul Alam; Radziah Wahid; Lu Feng. Anaerobic co-digestion of poultry droppings and briquetted wheat straw at mesophilic and thermophilic conditions: Influence of alkali pretreatment. Renewable Energy 2018, 128, 241 -249.
AMA StyleAnisur Rahman, Henrik Møller, Chayan Kumer Saha, Monjurul Alam, Radziah Wahid, Lu Feng. Anaerobic co-digestion of poultry droppings and briquetted wheat straw at mesophilic and thermophilic conditions: Influence of alkali pretreatment. Renewable Energy. 2018; 128 ():241-249.
Chicago/Turabian StyleAnisur Rahman; Henrik Møller; Chayan Kumer Saha; Monjurul Alam; Radziah Wahid; Lu Feng. 2018. "Anaerobic co-digestion of poultry droppings and briquetted wheat straw at mesophilic and thermophilic conditions: Influence of alkali pretreatment." Renewable Energy 128, no. : 241-249.
Bangladesh has an agrarian economy in which paddy is the dominant crop. A significant amount of field losses of paddy occurs every year due to natural calamities and a shortage of time during the harvesting period. During this study, a modification was done on locally developed BAU self-propelled reaper and its performance was compared with manual harvesting system of paddy. Several experiments were conducted in Boro paddy (April–May 2017) and Aman paddy harvesting (November–December 2017) at BAU farm of Bangladesh Agricultural University after necessary modification works in the workshop. An experiment was also conducted on Aman paddy in 2017 at BAU farm for determining manual harvesting cost. The technical and economic performances of the modified BAU self-propelled reaper were determined based on the field experiments. Results reveal that average fuel consumption, effective field capacity and field efficiency were 2.71 L/ha, 0.255 ha/h and 77.27%, respectively for the modified BAU self-propelled reaper and 2.88 L/ha, 0.25 ha/h and 75.76%, respectively for the existing BAU self-propelled reaper. These results indicated that field performances of modified BAU self-propelled reaper were better than that of the existing BAU reaper. Paddy harvesting cost was found 916 Tk/ha for modified BAU self-propelled reaper and 9200 Tk/ha for manual harvesting system. The benefit-cost ratio of the modified BAU self-propelled reaper was 2.18. Considering the technical and economic performances, modified BAU self-propelled reaper was found suitable than the existing BAU reaper. So, the modified BAU self-propelled reaper may be introduced in Bangladesh in the commercial basis.J. Bangladesh Agril. Univ. 16(2): 171-177, August 2018
Mahamudun Noby; Kamrul Hasan; Rostom Ali; Chayan Kumer Saha; Monjurul Alam; Mosharraf Hossain. Performance evaluation of modified BAU self-propelled reaper for paddy. Journal of Bangladesh Agricultural University 2018, 16, 171 -177.
AMA StyleMahamudun Noby, Kamrul Hasan, Rostom Ali, Chayan Kumer Saha, Monjurul Alam, Mosharraf Hossain. Performance evaluation of modified BAU self-propelled reaper for paddy. Journal of Bangladesh Agricultural University. 2018; 16 (2):171-177.
Chicago/Turabian StyleMahamudun Noby; Kamrul Hasan; Rostom Ali; Chayan Kumer Saha; Monjurul Alam; Mosharraf Hossain. 2018. "Performance evaluation of modified BAU self-propelled reaper for paddy." Journal of Bangladesh Agricultural University 16, no. 2: 171-177.
The experimental performance and artificial neural network modeling of rice drying in BAU-STR dryer is presented in this paper. The dryer consists of a biomass stove as a heat source, a perforated inner bin and a perforated outer bin with annular space for grains, and a blower (1 hp) to supply heated air. The dryer capacity was 500 kg of freshly harvested rice. Twenty experimental runs were conducted to investigate the experimental performance of the dryer for drying of rice. An independent multilayer neural network approach was used to predict the performance of the BAU-STR dryer for drying of rice. Ten sets of experimental data were used for training using back propagation algorithm and another ten sets of data were used for testing the artificial neural network model. The prediction of the performance of the dryer was found to be excellent after it was adequately trained. The statistical analysis showed that the errors (MSE and RMSE) were within and acceptable range of ±5% with a coefficient of determination (R2) of 99%. The model can be used to predict the potential of the dryer for different locations, and can also be used in a predictive optimal control algorithm.
Ashraful Alam; Chayan Kumer Saha; Monjurul Alam; Ali Ashraf; Bilash Kanti Bala; Jagger Harvey. Neural network modeling of drying of rice in BAU-STR dryer. Heat and Mass Transfer 2018, 54, 3297 -3305.
AMA StyleAshraful Alam, Chayan Kumer Saha, Monjurul Alam, Ali Ashraf, Bilash Kanti Bala, Jagger Harvey. Neural network modeling of drying of rice in BAU-STR dryer. Heat and Mass Transfer. 2018; 54 (11):3297-3305.
Chicago/Turabian StyleAshraful Alam; Chayan Kumer Saha; Monjurul Alam; Ali Ashraf; Bilash Kanti Bala; Jagger Harvey. 2018. "Neural network modeling of drying of rice in BAU-STR dryer." Heat and Mass Transfer 54, no. 11: 3297-3305.
Israil Hossain; Nurul Amin; Monjurul Alam; Chayan K Saha; Prasanta K Kalita; Alan C Hansen; Abdul Mottalib. Conservation Machinery for Planting of Mungbean and Jute in the Southern Region of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018 2018, 1 .
AMA StyleIsrail Hossain, Nurul Amin, Monjurul Alam, Chayan K Saha, Prasanta K Kalita, Alan C Hansen, Abdul Mottalib. Conservation Machinery for Planting of Mungbean and Jute in the Southern Region of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018. 2018; ():1.
Chicago/Turabian StyleIsrail Hossain; Nurul Amin; Monjurul Alam; Chayan K Saha; Prasanta K Kalita; Alan C Hansen; Abdul Mottalib. 2018. "Conservation Machinery for Planting of Mungbean and Jute in the Southern Region of Bangladesh." 2018 Detroit, Michigan July 29 - August 1, 2018 , no. : 1.
Chayan Kumer Saha; Ashraful Alam; Monjurul Alam; Alex Winter-Nielsen; Jagger Harvey. Scope of BAU-STR in existing paddy drying system of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018 2018, 1 .
AMA StyleChayan Kumer Saha, Ashraful Alam, Monjurul Alam, Alex Winter-Nielsen, Jagger Harvey. Scope of BAU-STR in existing paddy drying system of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018. 2018; ():1.
Chicago/Turabian StyleChayan Kumer Saha; Ashraful Alam; Monjurul Alam; Alex Winter-Nielsen; Jagger Harvey. 2018. "Scope of BAU-STR in existing paddy drying system of Bangladesh." 2018 Detroit, Michigan July 29 - August 1, 2018 , no. : 1.
During the transplanting period shortage of labor is a common issue which increased the labor wage and overall production cost of rice in Bangladesh. Study was conducted during Boro and Aman season 2017 in Dumuria Upazila of Khulna district to compare transplanting cost of rice in puddled and unpuddled conditions. A four row walk behind type self-propelled rice transplanter was used for conducting the mechanical transplanting. Rice varieties, BRRI Dhan28 and BRRI Dhan39 were used during Boro and Aman seasos, respectively.. Seedling growing medium was clay on polythene mat for both the seasons. During transplanting, the age of the seedling was 30 days and average height of the seedling was 14 cm in Boro season. In Aman season, the age of the seedling was 18 days with average height of 15 cm. In unpuddled soil, land was prepared by applying herbicide 4 to 5 days before transplanting during Boro season. Weeding was performed manually as herbicides could not be applied due to standing water in Aman season. Puddled plots were tilled by power tiller. In Boro season, cost saving by mechanical transplanting was 14,789 BDT/ha and 16,619 BDT/ha in puddled soil and in unpuddled soil, respectively whereas in Aman season, it was 14,892 BDT/ha and 14,053BDT/ha in puddled soil and in unpuddled soil, respectively in comparison to traditional manual transplanting. Rice transplanter is therefore suitable to reduce cost of paddy production and meet the labor crisis problem during transplanting season.
Muhammad Ashik-E-Rabbani; Mosharraf Hossain; Surajit Sarkar; Chayan Kumer Saha; Monjurul Alam; Prasanta Kumar Kalita; Alan C. Hansen. Cost Saving Rice Transplanting Technology for Puddled and Unpuddled Soil Condition. 2018 Detroit, Michigan July 29 - August 1, 2018 2018, 1 .
AMA StyleMuhammad Ashik-E-Rabbani, Mosharraf Hossain, Surajit Sarkar, Chayan Kumer Saha, Monjurul Alam, Prasanta Kumar Kalita, Alan C. Hansen. Cost Saving Rice Transplanting Technology for Puddled and Unpuddled Soil Condition. 2018 Detroit, Michigan July 29 - August 1, 2018. 2018; ():1.
Chicago/Turabian StyleMuhammad Ashik-E-Rabbani; Mosharraf Hossain; Surajit Sarkar; Chayan Kumer Saha; Monjurul Alam; Prasanta Kumar Kalita; Alan C. Hansen. 2018. "Cost Saving Rice Transplanting Technology for Puddled and Unpuddled Soil Condition." 2018 Detroit, Michigan July 29 - August 1, 2018 , no. : 1.
Rostom Ali; Kamrul Hasan; Chayan Kumer Saha; Monjurul Alam; Mosharraf Hossain; Prasanta Kumar Kalita; Alan Christopher Hansen. Role of Mechanical Rice Harvesting in Socio-Economic Development of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018 2018, 1 .
AMA StyleRostom Ali, Kamrul Hasan, Chayan Kumer Saha, Monjurul Alam, Mosharraf Hossain, Prasanta Kumar Kalita, Alan Christopher Hansen. Role of Mechanical Rice Harvesting in Socio-Economic Development of Bangladesh. 2018 Detroit, Michigan July 29 - August 1, 2018. 2018; ():1.
Chicago/Turabian StyleRostom Ali; Kamrul Hasan; Chayan Kumer Saha; Monjurul Alam; Mosharraf Hossain; Prasanta Kumar Kalita; Alan Christopher Hansen. 2018. "Role of Mechanical Rice Harvesting in Socio-Economic Development of Bangladesh." 2018 Detroit, Michigan July 29 - August 1, 2018 , no. : 1.