Dedicated vertical axial loads on the soil from the wheels of a self-propelled seed drill, the area of the contact patch, the maximum contact pressure for the front and rear wheels and the density of the soil are determined by evaluations and experimental methods. The discrepancy between the theoretical and experimental indicators was: 1.4% and 2.0% for the rear and front wheels in vertical axial loads; 2.8% and 2.2% for the rear and front wheels by the contact area of the tires of the seeder with the soil and the maximum contact pressure; 6.2% – the maximum discrepancy on the values of soil density at a depth of 7.6 cm. Soil hardness was measured in three zones: before the seeder's passage and after each of its passage in a rut behind the front and rear wheels at six different depths, determined by the marks on the soil densimeter tester density. Graphics of dependencies of soil hardness on the depth of measurement were constructed.

The development of robotic and unmanned mobile energy facilities (MEF) is a priority for the development of agricultural production worldwide. In order for the MEF to become unmanned, it must be equipped with an automatic control system that allows you to control the MEF without human intervention. To develop algorithms for the control action and reactions of the control system, as well as to identify and eliminate its incorrect operation, it is necessary to create specialized stationary stands. The stands should simulate the real working conditions of unmanned MEF with maximum accuracy. This article presents the concept of creating a simulation stand for testing the control system of an unmanned combine harvester, which allows you to analyze the operation of the control system in conditions as close as possible to real ones. A functional diagram of the stand and hydraulic circuits of individual simulation units are presented, which should become the basis for the development of the stand design as a whole.

The cargo transportation is an integral and energy-consuming part of agricultural production. To improve the energy performance of transport tractor units (TTU), an elastic-damping mechanism (EDM) installed in the tractor transmission was developed. An experimental study was conducted to identify the influence of the EDM on the operation of the tractor as part of the TTU, when it is moving on a dirt road in the 9th gear of the main speed range of the gearbox (GB) of the tractor. A tractor of traction class 1.4 was used. Energy sensors were installed on the main elements of the tractor. The energy performance of the tractor with a transmission equipped with the EDM and the tractor with a factory transmission are determined. A decrease in fuel consumption by 7.3%, a decrease in traction forces from an aggregated trailer by 19.9%, a decrease in the amplitude of fluctuations in traction forces by 28.3% and a decrease in skidding of the driving units by an average of 9.7% were revealed. A graph describing the dynamics of changes in the skidding of the driving units of a serial tractor and a tractor with the EDM in time is constructed. The statistical processing of the skidding indicators is performed. A decrease in the amplitude of fluctuations in the coefficient of skidding by 16.3% was revealed. The obtained results of experimental studies indicate that the tractor as part of the TTU with the EDM in the transmission has better performance compared to a serial tractor and has a lower load on the engine, gearbox elements and driving wheels of the tractor.