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All Journal Journal of Renewable Energy and Mechanics Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development
Jhonni Rahman
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Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Enhancing Agricultural Land Processing Through Tillage Machine Utilization in Pangean Farmer Groups Jhonni Rahman; Yulianto, Dody; Rizal, Yose; Subekti, Purwo; Asrol, Asrol; Anwar, Moh. Syaiful; Zuliantoni, Zuliantoni
Dharmakayana Vol 2 No 2 (2025): November : Dharmakayana: Journal of scientists, engineers, educators and scientif
Publisher : Program Studi Teknik Mesin, Fakultas Teknik Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dk.v2i2.45243

Abstract

The use of plowing machines is an important innovation in horticultural farming systems because it can increase land efficiency and productivity. This activity aims to analyze the effectiveness of plowing machines in accelerating the soil cultivation process and its impact on increasing the productivity of horticultural farmers in the Jaya Makmur Farmers Group. A descriptive approach was used by observing the plowing machine's working process and comparing it with traditional soil cultivation methods commonly used by farmers. Data were obtained through field observations and interviews with farmer group members. The results showed that the use of plowing machines increased the speed of soil cultivation up to ten times faster than traditional methods. In addition, plowing machines resulted in more even soil inversion, creating more optimal soil conditions for horticultural plant growth. These findings confirm that the use of plowing machines not only saves time and labor but also has the potential to increase crop productivity through more efficient soil management. Thus, the use of plowing machines is a strategic solution to support increased efficiency and yields in horticultural cultivation.
The Effect of Fibre Direction on the Mechanical Properties of Polyester Matrix-Based Palm Oil Fibre Composite Yulianto, Dody; Arman Maulana; Shandy Kurniadi; Ari Prasetyo; Sehat Abdi Saragih; Jhonni Rahman; Kurnia Hastuti; Eddy Elfiano
Journal of Renewable Energy and Mechanics Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2026.23953

Abstract

The increasing use of composite materials, especially for the two-wheeled vehicle industry, requires an in-depth study of fibre direction. Where the fiber direction can determine the occurrence of initial damage to the composite material. This study aims to produce a composite board from oil palm fruit fibre reinforced with a polyester matrix. In this study, the composite board consists of 3 types, namely sample 1 (discontinuous direction 0°), sample 2 (discontinuous direction 90°), and sample 3 (random fibre direction). The highest bending and impact test results were in specimen 1 with a 0° fibre direction, namely 63.93 MPa and 0.519 Joules/mm2, while the lowest bending and impact test results were in specimen 3 with a random fibre direction, namely 58.63 MPa and 0.382 Joules/mm2. Specimens with horizontal fibre directions have higher strength values. When the fibres are arranged in a 90° direction and a random direction, the mechanical strength is lower, because the load is mostly borne by the material matrix, which is generally weaker than the fibres. Macrophotography at 0° shows that the bonding mechanism of oil palm fruit fibres with the polyester resin matrix is quite good, with visible fibre pullout. This indicates that the bond between the fibre and the matrix weakens as the applied load increases. When the matrix fails, the fibres can still bear the load, so the fracture process does not occur simultaneously with the matrix failure. If the composite fibres become more brittle and the load is distributed to the fibres, which pulls them out, this will result in high toughness and bending strength.
Co-Authors Anwar, Moh. Syaiful Ari Prasetyo Arman Maulana Asrol Asrol Eddy Elfiano Kurnia Hastuti Purwo Subekti Sehat Abdi Saragih Shandy Kurniadi Yose Rizal Yulianto, Dody Zuliantoni, Zuliantoni