In agriculture, machines engaged in various agrotechnical activities and operations have different impacts on the soil. The effect of mechanization is primarily reflected in two indicators: soil density and hardness. At the same time, considering the direct dependence of tractive resistance on soil hardness in processing machines and sprayers, we studied subsequent changes in the soil in the path of wheels affected by the soil after the passage of four-wheeled and three-wheeled tractors. We also examined various atmospheric pressures in the tractor’s tires and the impact of different types of tires on soil compaction and traction. The studies showed that to reduce the compression impact on the soil of four-wheeled tractor working systems during certain technical operations, it is necessary to choose the maximum permissible travel speed and the minimum air pressure in the tires specified in the technical conditions. This approach helps to decrease soil compaction and maintain its structure. Additionally, it was found that three-wheeled tractors exert less pressure on the soil compared to four-wheeled ones, which should also be considered when selecting equipment for different agrotechnical tasks. Optimizing tire pressure and tractor speed is crucial for minimizing negative soil impact and enhancing the efficiency of agricultural operations.

Universal-plowing wheeled tractors are operated in two fundamentally different modes: in-ter-row machining, where driving precision and minimum turning radius are decisive, and transport operations, where stability and smoothness of movement come to the fore. The trans-formed driving system, which allows for changing the base, track, and clearance (and conse-quently, the agrotechnical or road clearance), allows for adjusting the geometry of the driving system to the operating mode; however, the influence of these parameters on the oscillations of the frame has been studied in fragments. The work analyzed an array of 545 publications downloaded from the Scopus database on September 21, 2026, on the topic of vibrations of tractors and off-road vehicles. It is shown that 73% of the documents were published after 2010, and the research focuses on operator vibration protection, seat and cabin suspension, and tire dynamics, while works where base, track, and clearance are considered simultaneously variable parameters are rare, and there are no publications on tractors with a transforming chassis in the sample. To fill this gap, a mathematical model of the tractor's plane oscillations was constructed based on Lagrange equa-tions of the second kind, taking into account the non-holonomic connections of wheel rolling, and characteristic equations and expressions for low-frequency and high-frequency components of natural oscillations were obtained. Modeling at 245 cm and 275 cm bases, corresponding to tractors for row tillage and transport work, showed that as the speed increases, the oscillation amplitude increases and the period decreases, while increasing the tractor base decreases the amplitude. Tests of the TTZ-1033M tractor prototype with ADXL345 accelerometers at a track gauge of 1200–2400 mm and a clearance of 650–870 mm confirmed these dependencies: the increase in clearance in-creases vertical vibrations, the increase in base decreases them, and the change in track mainly determines the difference in rear wheel vibrations. The practical conclusion is that it is advisable to have a short tractor base for row-crop cultivation and a long tractor base for transport work.