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The object of this study is the process of strip tillage, its effect on soil moisture in the strip, and subsequent vegetation of sunflower plants. At the same time, the task to increase the efficiency of strip tillage was solved. It has been established that the rational values of the structural and technological parameters of the strip tillage section in terms of fuel consumption depend on the speed of movement of the unit, the depth and width of the tilled strip of soil. One section of the unit was used for the research. The studies were conducted using the Box-Benkin three-factor experiment design. It was established that the rational values of the structural and technological parameters of strip tillage in terms of fuel consumption have the following values: the depth of strip tillage h = 20–25 cm, the width of strip tillage b = 20–25 cm, the speed of the unit from 7.5 to 11 km/hours. In this case, the actual fuel consumption ranged from 4.2 to 6.3 l/ha. It was also established that an increase in the width and depth of the strip cultivation leads to an increase in moisture loss in it. The highest value of soil moisture occurs at the minimum values of the depth and width of the strip cultivation, and the lowest at their maximum values. The influence of the width of the cultivated strip on the height of sunflower plants is more significant than the influence of the depth of tillage. This applies both to the range of changes in the height of sunflower plants (12.4–13.6 cm compared to 12.5–13.1 cm) and the intensity of the impact. The greatest influence on the height of sunflower plants is exerted by the magnitude of the transverse displacement of the axis of the row of plants. The intensity of this influence is approximately the same as the depth of tillage, and the range of changes in the height of sunflower plants is 11.7–14 cm. Research results could be used in the design of units for strip tillage and sowing units. [ABSTRACT FROM AUTHOR]

The object of the study is the process of changing tribological efficiency according to tribotechnical characteristics (wear intensity, friction coefficient, temperature in the contact zone) of composites based on phenylone C-1 and polyamide PA-6 with arimide-T filler and fullerene C-60. The study solved the problem of obtaining composites with high wear resistance. Based on the results of research, it was found that varying the content of arimide-T makes it possible to obtain composites with different patterns of changes in tribotechnical characteristics under conditions of dry friction, lubrication with water and I-50 oil. Composites with the composition: phenylone C-1+15 wt. have the maximum tribological efficiency. % arimide-T+3 wt. % fullerene C-60 and polyamide PA-6+30 wt. % arimide-T+3 wt. % fullerene C-60. Phenylone C-1 has destructive properties when working in the environment of water and temperature in the friction zone. Its reinforcement with arimide-T and fullerene C60 gave positive results of a complex of tribotechnical characteristics under these conditions. It was found that the wear of composites based on phenylone C-1 in I-50 oil is two orders of magnitude lower than in water. Research of samples from the obtained composites based on phenylone C-1 and polyamide PA-6, reinforced with the optimal content of arimide-T and fullerene C60, showed that their wear resistance when lubricated with oil is 3.5...4.0 times greater than the wear resistance of bronze. An applied aspect of the reported results is the introduction of manufacturing technologies and restoration of machine parts from the proposed composites. It has been proven that their optimal composition contributes to high tribological efficiency and could provide the required level of wear resistance and reliability of resource-determining nodes, systems, and machine assemblies. The results could be used by machine-building and repair-technological enterprises [ABSTRACT FROM AUTHOR]