Research Article
Development and Performance Evaluation of Tractor-Drawn Chisel-Plow
Rebira Wirtu*
,
Wasihun Mitiku,
Anane Gemeda
Issue:
Volume 14, Issue 4, August 2026
Pages:
68-79
Received:
8 May 2026
Accepted:
20 July 2026
Published:
11 September 2026
Abstract: Secondary tillage refers to tillage activities that come after primary tillage and are carried out to establish the right soil tilth for planting and seeding. Chisel plows are agricultural implements that farmers use to till the soil in preparation for planting crops. This plough can assist in breaking up ploughman and hardpan and lessen the effects of compaction. For no-till and low-till farming methods that aim to enhance erosion control and the advantages of maintaining organic matter and farming wastes on the soil surface throughout the year, a chisel plow is helpful. This study's goal was to create a tractor-drawn chisel plow for primary tillage and assess the device's effectiveness. A rectangular frame, a tyne, a chisel, a three-point hitch, and various connecting tools, including a washer, bolts, and nuts, made up the created tractor-drawn chisel plow. The depth, field capacity, field efficiency, clod mean weight diameter, bulk density, moisture content, and physical characteristics of the soil were all taken into account when evaluating the implement's performance. The field experiment was conducted at different depths of operation, 15cm. 20cm and 25cm, and tractor forward speed of 3, 5, and 7km/hr. The collected data were statistically analyzed using R software, and statistical differences in the effects of treatment means were tested at 5% levels of significance and separated using the least significant difference (LSD). From the obtained results, the draft requirement, the mean effective field capacity, field efficiency, fuel consumption, draft power, wheel slippage, and tillage performance index were 5.68 kN, 0.98 ha/hr.93.28%, 8.076l/ha, 9.38 kW, 11.33, and 2.69 at a tractor forward speed of 7 km/hr and 25 cm depth of operations. Based on the performance evaluation results, it is concluded that the developed tractor-drawn spike tooth harrow can be efficiently, effectively, and economically used by the end users.
Abstract: Secondary tillage refers to tillage activities that come after primary tillage and are carried out to establish the right soil tilth for planting and seeding. Chisel plows are agricultural implements that farmers use to till the soil in preparation for planting crops. This plough can assist in breaking up ploughman and hardpan and lessen the effect...
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Research Article
Investigation of Aerodynamic Parameters of Underground Mine Ventilation Using Fan-ejector Units
Ravshanov Avaz Ali Ugli*,
Nurkhonov Khusan Almirza Ugli
Issue:
Volume 14, Issue 4, August 2026
Pages:
80-87
Received:
17 September 2026
Accepted:
27 September 2026
Published:
30 September 2026
Abstract: This article investigates the determination and evaluation of the aerodynamic parameters of a mine ventilation network when fan-ejector units are used for the ventilation of underground mine workings. Dead-end workings of the Zarmitan and Gujumsay mines of JSC “NMMC”, characterized by complex ventilation conditions, were selected as the research objects. The mining and technical conditions of the mines, the total power of self-propelled mining equipment, the required standard airflow rate, and the air capacity of the installed VM-6 auxiliary ventilation fan were comparatively analyzed. The calculations showed that the required airflow exceeds the fan capacity by a factor of 1.72 times at the Zarmitan mine and 1.06 times at the Gujumsay mine. The aerodynamic resistance of the ventilation network was evaluated on the basis of airflow rate and pressure loss, and the quadratic relationship between mine depression and airflow rate was analyzed. When the fan-ejector unit was incorporated into the ventilation network, airflow distribution was investigated using Kirchhoff’s first and second laws, taking into account the airflow balance at network junctions and the pressure balance within closed ventilation circuits. For the iterative ventilation-network calculations, a numerical tolerance of ΔQ/Q₀ ≤ 5% was adopted in this study as the convergence criterion for the airflow balance. In addition, the pressure characteristic of the fan-ejector unit was evaluated from the difference between the total pressures at its inlet and outlet, while its relative efficiency was analyzed as a function of the mixed airflow rate. The obtained results demonstrate that the operating mode of a fan-ejector unit should be determined through an integrated consideration of airflow rate, aerodynamic resistance, mine depression, airflow distribution within the ventilation network, and the pressure characteristics of the unit. The results can be used to substantiate the operating parameters of fan-ejector units and to evaluate the aerodynamic performance of auxiliary ventilation systems in underground mine workings with complex ventilation conditions.
Abstract: This article investigates the determination and evaluation of the aerodynamic parameters of a mine ventilation network when fan-ejector units are used for the ventilation of underground mine workings. Dead-end workings of the Zarmitan and Gujumsay mines of JSC “NMMC”, characterized by complex ventilation conditions, were selected as the research ob...
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