Design and Construction of a Disc Harrow Carrier Chassis in a Soil Bin and Measuring Its Draft Force

Articles in Press

Document Type : Research Article

Authors

• H. Shaebani shesh poli
• M. Askari
• D. Kalantari

Department of Biosystems Engineering, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

https://doi.org/10.22067/jam.2025.92582.1372

Abstract

Introduction
One of the most important parts of agricultural operations is tillage, which accounts for about 60% of the total energy consumed. Therefore, reducing tillage energy demand by lowering the number of passes through the development of cost-effective machinery is highly essential in modern farming. One of the main implements that helps farmers achieve this is the disc harrow. As the most important secondary tillage tool, the disc harrow improves soil structure, breaks up clods, and increases the penetration of water and air into the soil. However, its optimal performance is influenced by parameters such as disc diameter, disc edge type (toothed or plain), disc gang angle, and tractor forward speed. Soil bins, as controlled environments for testing tillage tools, serve as an ideal alternative to agricultural lands. They allow accurate simulation of field conditions while minimizing the effects of climate change and variable soil properties.
Materials and Methods
The present study was conducted with the aim of designing, constructing, and evaluating a disc harrow carrier chassis in the controlled environment of a laboratory soil bin. First, the design phase was carried out using SolidWorks 2020 software, followed by an analysis of the design performance under maximum load using the von Mises method. The next step was the construction of the design. After construction, the evaluation phase was performed by examining the effects of four independent input variables: forward speed (6.43 and 13.15 m min⁻¹), soil moisture content (2.37 and 13.25 percent on a wet basis), disc edge type (plain or toothed), and disc gang angle (0, 15, and 30 degrees), on the dependent output variable, draft force. Each test was replicated three times, resulting in a total of 72 tests.
Results and Discussion
The results showed that the engineered chassis exhibited sufficient strength during the initial evaluation tests, with all components performing well. The findings indicated that increasing forward speed and disc gang angle led to higher draft force, while higher soil moisture levels reduced draft force. Under low moisture conditions, plain discs generated greater draft force; however, this trend reversed as moisture increased. The highest draft requirement (3.588 N) was observed for plain discs at 2.37% moisture, while the lowest (1.724 N) occurred at 13.25% moisture. At a forward speed of 6.43 m min⁻¹, plain and toothed discs required equal draft, but at 13.15 m min⁻¹, the toothed discs required substantially more draft.
Conclusion
The experiments showed that there was no significant difference in draft force between disc gang angles of 0 and 15 degrees. However, increasing the angle from 15 to 30 degrees caused a significant rise in draft force. This indicates that the initial increase in gang angle has a smaller effect, but beyond 15 degrees the impact becomes more pronounced. Therefore, selecting an appropriate disc gang angle can help reduce fuel consumption and improve the productivity of agricultural machinery. Both increasing disc gang angle and forward speed raise draft force because soil resistance to disc movement increases. At higher speeds, the disc must exert more force to cut and move the soil, leading to higher energy consumption and greater equipment wear. Conversely, at lower speeds, draft force decreases, but tillage efficiency may be reduced and plowing uniformity may be affected.

Keywords

• Disc
• Draft force
• Soil bin
• Soil-blade interaction
• Tillage operation

Main Subjects

• Design and Construction

©2025 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0)

References

1. Abdalla, O. A., Mohamed, E. A., El Naim, A. M., El Shiekh, M. A., & Zaied, M. B. (2014). Effect of disc and tilt angles of disc plough on tractor performance under clay soil. Current Research in Agricultural Sciences, 1(3), 83-94.
2. Afify, M., Kushwaha, R., & Gerein, M. (1998). Effect of combined disc angles on soil forces of coulter discs. 2001 ASAE Annual Meeting. https://doi.org/10.13031/2013.4041
3. Amantayev, M., Gaifullin, G., Kravchenko, R., Kushnir, V., & Nurushev, S. (2018). Investigation of the furrow formation by the disc tillage tools. Bulgarian Journal of Agricultural Science, 24(4), 704-709.
4. Askari, M., Shahgholi, Gh., & Abbaspour-Gilandeh, Y. (2017). The effect of tine, wing, operating depth and speed on the draft requirement of subsoil tillage tines. Research in Agricultural Engineering, 63(4), 160-167. https://doi.org/17221/4/2016-RAE
5. Aykas, E., Cakir, E., & Gulsoylu, E. (2004). The effect of tillage parameters on the performance of the heavy duty offset disk harrow. Asian Journal of Plant Sciences, 3(4), 425-428. https://doi.org/3923/ajps.2004.425.428
6. Badegaonkar, U. R., Kamble, A. K., & Thakare, S. H. (2014). Performance evaluation of straw cutting mechanism under no-till crop residue conditions in the soil bin. PKV Research Journal, 38(1), 47-52.
7. Goryachkin, V. P. (1968). Collocted Works in Three Volumes. 2^nd TT71-50087. Sprinfield VA: Nat. Technical Information Service. U.S. Department of Commerce.
8. Hann, M., & Giessibl, J. (1998). Force measurements on driven discs. Journal of agricultural engineering research, 69(2), 149-157. https://doi.org/10.1006/jaer.1997.0241
9. Kim, W. S., Kim, Y. J., Park, S. U., & Kim, S. (2021). Influence of soil moisture content on the traction performance of a 78-kW agricultural tractor during plow tillage. Soil and Tillage Research, 207, 104851. https://doi.org/10.1016/j.still.2020.104851
10. Liskin, I. V., Lobachevsky, Y. P, Mironov, D. A., Sidorov, S., & Panov, A. (2018). Laboratory study results of soil-cutting operating elements. Agricultural Machinery and Technologies, 12(4), 41-47. https://doi.org/10.22314/2073-7599-2018-12-4-41-47
11. Mansouri Rad, D. (2013). Tractors and agricultural machinery. 1 st edition. Bou ali sina university. 17 th print.
12. Manuwa, S. (2009). Performance evaluation of tillage tines operating under different depths in a sandy clay loam soil. Soil and Tillage Research, 103(2), 399-405. https://doi.org/10.1016/j.still.2008.12.004
13. Nkakini, S., & Fubara-Manuel, I. (2014). Effects of soil moisture and tillage speeds on tractive force of disc ploughing in loamy sand soil. European International Journal of Science and Technology, 3(4), 157-164.
14. Rashidi, M., Najjarzadeh, I., Jaberinasab, B., Emadi, S. M., & Fayyazi, M. (2013). Effect of soil moisture content, tillage depth and operation speed on draft force of moldboard plow. Middle East Journal of Scientific Research, 16(2), 245-249. https://doi.org/5829/idosi.mejsr.2013.16.02.11675
15. RNAM test codes and procedures for farm machinery. (1995). 468p.
16. Torotwa, I., Ding, Q., Alele, J. O., & He, R. (2022). 3D finite element analysis of the tillage and straw cutting performance of a curved-edged toothed disc. Engineering Agriculture, 42(2), 190-210. https://doi.org/10.1590/1809-4430-Eng.Agric.v42n2e20210190/2022
17. Torotwa, I., Ding, Q., Makange, N. R., Liang, L., & He, R. (2021). Performance evaluation of a biomimetically designed disc for dense-straw mulched conservation tillage. Soil and Tillage Research, https://doi.org/10.1016/j.still.2021.105068
18. Upadhyay, G., & Raheman, H. (2018). Performance of combined offset disc harrow (front active and rear passive set configuration) in soil bin. Journal of Terramechanics, 78, 27-37. https://doi.org/10.1016/j.jterra.2018.04.002
19. Vilde, A. (2003). Impact of soil moisture and composition on its properties and energy consumption of tillage. Proceedings of the International Scientific and Practical Conference about Environment. Technologies. Resources.
20. Zeng, Z. W., Chen, Y., & Qi, L. (2019). Soil Cutting by a compact disc harrow having various disc arrangements. Transactions of the ASABE, 62(2): 429-437. https://doi.org/10.13031/trans.13106
21. Zeng, Z. W., Chen, Y., & Zhang, X. (2017). Modelling the interaction of a deep tillage tool with heterogeneous soil. Computers and Electronics in Agriculture, 143, 130-138. https://doi.org/10.1016/j.compag.2017.10.005
22. Zhang, Y. (2016). On the mechanics of disc-soil-planter interaction. A thesis submitted to the college of graduate studies and research in partial fulfillment of the requirements for the degree of master of science in the department of mechanical engineering university of saskatchewan saskatoon. 219.
23. Zubko, V., Sokolik, S., Khvorost, T., & Melnyk, V. (2021). Factors affecting quality of tillage with disc harrow. 20^th International Scientific Conference Engineering for Rural Development. https://doi.org/22616/ERDev.2021.20.TF262