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Development and Evaluation of Self-propelled Cabbage/Cauliflower Harvester

NASS Journal of Agricultural Sciences 2022年第1期4卷 56-63页

作者： Jagvir Dixit Naieam Jan Rawat Division of Farm Machinery and Power Engineering College of Agricultural Engineering&TechnologySKUAST-KSrinagar(J&K)India

In the present study,self-propelled cabbage/cauliflower harvester was designed,developed and *** machine consisted of different components like engine,frame,shearing(cutting)unit and power transmission *** power transmission unit consisted of main clutch,shearing blade operating clutch,belt drive unit,chain and sprocket drive,universal joint and cutter blade *** main working principle of harvester is based on shearing of crop stem against high-speed rotating *** power from the engine is transmitted by belt-pulley drive unit to transmission shaft on which chain and sprocket is mounted on one side and then power is transmitted to shearing blade coupling with the help of a stationary pulley and fixed *** mean head diameter of the selected cabbage and cauliflower was 89.5±15.24 mm and 107.5±15.24 mm,*** mean stem(plant)diameter of the selected cabbage and cauliflower was 18±4.85 mm and 21.5±3.08 mm,*** shearing force increased with increase in diameter of *** optimum performance of the machine was achieved when it was operated at 1.5 km/h forward speed and the shearing blade moving at speed of 147 *** mean field capacity for developed prototype was observed as 0.063 ha/h and 0.053 in case of cabbage and cauliflower,respectively with field efficiency of 91.97 and 90.48%.The average head damage was negligible(0.15%)for both the *** average untrimmed percentage with developed harvester was 3.2 and 3.0%in case of cabbage and cauliflower crop,*** developed machine helps to increase the field capacity in cabbage/cauliflower harvesting due to 7-times more capacity and 50%cheaper compared to traditional method of cabbage/cauliflower *** the operating condition of forward speed(1.5 km/h)and shearing blade speed(147 rpm),the machine could harvest 0.5 ha of cabbage and 0.42 ha of cauliflower farm per day of *** same task would have required between 15 labour per day if

关键词： Self-propelled Harvester Cabbage/cauliflower field capacity field efficiency Untrimmed percentage

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Assessment of BRRI Whole Feed Combine Harvester (Model BRRI WCH2021) for Mechanized Rice Harvesting in Bangladesh

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Agricultural Sciences 2024年第2期15卷 274-291页

作者： Arafat Ullah Khan Akm Saiful Islam Md. Kamruzzaman Pintu Subrata Paul Md. Durrul Huda Md. Anwar Hossen Md. Monirul Islam Md. Moudud Ahmmed Farm Machinery and Postharvest Technology Division Bangladesh Rice Research Institute Gazipur Bangladesh Workshop Machinery & Maintenance Division Bangladesh Rice Research Institute Gazipur Bangladesh

Agricultural mechanization plays a pivotal role in the transition from subsistence to commercial agriculture, with a particular focus on labour-intensive activities like harvesting. This study assesses the operational characteristics of the BRRI Whole Feed Combine Harvester (Model BRRI WCH2021) at the field level. Developed under the SFMRA project, the harvester’s technical performance and loss assessment were conducted during the Boro 2022 and Aman 2022 seasons in farmer fields in Bangladesh’s Rangpur region. The field efficiency of the harvester was determined to be 62.5% and 57.9% in the Boro and Aman seasons, respectively. Fuel consumption rates were recorded at 2.77 l/ha and 2.31 l/ha for the Boro and Aman seasons. The total harvesting losses, encompassing cutter bar, shatter, cylinder, and separation loss, averaged 0.56% and 0.48% in the Boro and Aman seasons, respectively. Mechanized harvesting with the BRRI Whole Feed Combine Harvester significantly reduced paddy losses by 5.81% compared to manual methods. The field evaluation results indicate the combine harvester’s satisfactory performance, highlighting its potential to alleviate labour demands during peak harvesting. The development of the BRRI WCH offers a sustainable solution for rice harvesting mechanization among progressive farmers. It paves the way for the broader adoption of advanced agricultural technology in Bangladesh.

关键词： BRRI Whole Feed Combine Harvester field efficiency Fuel Consumption Harvesting Loss

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Performance Evaluation of Manually Operated Mulch Laying Machine on Different Soil Conditions

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NASS Journal of Agricultural Sciences 2023年第1期5卷 8-18页

作者： S.V.Pathak A.V.Rangbhal P.U.Shahare C.S.Bagde S.S.More Department of Farm Machinery and Power Engineering College of Agricultural Engineering and TechnologyDr.Balasaheb Sawant Konkan Krishi VidyapeethDapoliIndia Department of Soil Science College of AgricultureDr.Balasaheb Sawant Konkan Krishi VidyapeethDapoliIndia

A machine with manual operation for mulch-laying machine with a punching arrangement was developed,and its performance was assessed at three different mulch paper thicknesses(15 m,20 m and 25 m),three different disc angles(35 degrees,40 degrees,and 45 degrees),three different punch spacings(250 mm,500 mm,and 1000 mm),and three different forward speeds(1.3 km/h,1.5 km/h,1.7 km/h)to investigate their effects on field capacity,effective field efficiency,and punching *** randomised block design and response surface methods,the experimental plan for optimization was *** of the independent variables’combined effects on the dependent variables were found to be statistically *** influence of operating speed and mulch paper thickness was found to be the most significant on the dependent *** effective field capacity and field efficiency increased from 0.11 ha/h to 0.19 ha/h and 72.04 percent to 89.51 percent,respectively,by increasing mulch paper thickness from 15μm to 25μm and operating speed from 1.3 km/h to 1.7 km/h,whereas punching efficiency fell from 85.18 percent to 84.40 *** paper of 15μm and a disc angle value of 40 degrees were optimised from the independent factors that were chosen for optimal soil covering over the laid plastic mulch *** efficiency was maximised with performance optimised at 500 mm punch ***,the machine operated more efficiently at 1.5 km/h.

关键词： field efficiency Punching efficiency Response surface methodology Mulch laying machine

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