Effect of the tractor driving systems type on soil compaction and drive wheel slip

Moinfar, AbdolMajid; Shahgholi, Gholamhossein; Abbaspour-Gilandeh, Yousef; Mesri Gundoshmian, Tarahom

doi:10.22092/erams.2018.121503.1253

Document Type : Original Article

Authors

¹ Department of Biosystem Engineering, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili

² Department of Bosystem Engineering, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili

³ Associate Professor, Department of Biosystem Engineering, Faculty of agriculture and natural resources, University of Mohaghegh Ardabili, Ardabil, Iran

https://doi.org/10.22092/erams.2018.121503.1253

Abstract

The four-wheel drive and rear-wheel drive tractors are commonly used in agricultural operations. In order to investigate the effect of a type of driving system a series of tests were performed usin the three driving systems of foour wheel drive, rear wheel drive and front wheel drive in different axle loads of 0, 150 and 300 kg, tire inflation pressures of 170, 200 and 230 kPa and travel speeds of 1.26, 3.96 and 6.78 km/h. Bulk density was measured as an indicator of soil compaction at different depths of 10, 20, 30 and 40 cm. Also, under the different conditions, the drive wheel slip was measured. To carry out the tests, the four-wheel tractor of Goldoni 240 was used which has the ability to work with mentioned driving systems. The experiments were carried out under controlled conditions in a soil channel with the length of 3 m and a width and depth of 1 and 0.6 m, respectively. Test were conducted in completely randomised block design with three repetations and results were analysied using SPSS 22 software. The results showed that by changing the driving system from 4WD to RWD and FWD, there was a significant increase in soil density, with the lowest density associated with 4WD system and the highest density related to FWD. The reason for increasing the density by changing the driving system can be attributed to different slip levels in each of these systems due to the lower slip percentage of the 4WD system than the other two systems. Increasing axial load increased soil boulk density. Of note that with increasing the axial load, the stress was transferred from the surface soil to the subsoil layers. As the axial load on tire increases, the subsoil density was closer to the surface layer. Increased axial load on tire and decreasing tire pressure reduced wheel slip. Stepwise regression model with determination coefficient of 0.92 and according to calculated standard coefficients showed that axial load, soil depth, type of driving system, tractor speed, and finally tire pressure, have the greatest effect on soil bulk density, respectively.

Keywords

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Agricultural Mechanization and Systems Research

Effect of the tractor driving systems type on soil compaction and drive wheel slip

References

References

Volume 22, Issue 79 - Serial Number 79
December 2021
Pages 1-20

Effect of the tractor driving systems type on soil compaction and drive wheel slip

References

References

Volume 22, Issue 79 - Serial Number 79December 2021Pages 1-20

Volume 22, Issue 79 - Serial Number 79
December 2021
Pages 1-20