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Purpose. Development and production of competitive implement for surface vertical tillage for tractors with a capacity of 220 hp or more. Methods. Experimental research and development. Results. The VT-7.0 implements for surface vertical tillage, as well as for peeling and deep disking of stubble were developed, tested and put into production. Conclusions. A richly functional implement VT-7.0 for tractors with a capacity of 220 hp or more has been developed. The main purpose of the implement is vertical surface tillage with angles of attack of the working bodies of 0–9º. At higher angles of attack (10–15º), it can be used for stubble peeling, as well as for deep disking (at angles of attack up to 25º). It has been established that an increase in the angles of attack of the working parts of the imple- ment from 6 to 12º leads to an increase in the depth of tillage (from 5.6 to 9.3 cm) and to an increase in fuel consumption (from 6.0 to 9.8 l/ha). At an angle of attack of 0º, fuel consumption was 4.1 l/ha. The quality of tillage was satisfactory: the mean-square deviation of depth in the experiments did not exceed 2.8 cm, and the surface ridge was 3.2 cm. The productivity of the unit at an operating speed of 12.6–13.2 km/h was in the range of 6.7–7.3 ha/h. The VT-7.0 gun was put into production. The plant of Krasnyanske SP Agromash LLC accepts orders from farms for the manufacture, supply and service of a new development. Keywords: vertical cultivation, implement, soil, tests, indicators, angle of attack.

Purpose. To determine the economic efficiency of using the MEV-115 “Autotractor” in comparison with tractors of traction class 1.4 for growing winter wheat in farms of the Forest-Steppe zone of Ukraine. Methods. Using a standardized methodology for economic evaluation of equipment at the testing stage [8, 9], calculations based on typical technological maps. Results. According to the results of the research, it was found that for a farm in the Forest-Steppe zone with a land use area of 200 hectares when growing winter wheat monoculture, it is advisable to form a machine-tractor park based on a mobile energy vehicle formed on the basis of an off-road automobile chassis. The rational use of the MEV-115 “Autotractor” proposed in the research allows reducing direct operating costs by 10–26 % compared to traditional tractors. Conclusions 1. The use of the MEV-115 “Autotractor” provides the lowest direct operating costs of 11687 UAH/ha compared to other considered MTP variants, which is 10–26 % less. 2. Due to the installation of trailed equipment directly on the MEV-115 “Autotractor” frame, the cost of agricultural machinery is reduced by approximately 30 %, which significantly reduces the cost of the MTP farm. 3. The cost of the MTP based on the MEV-115 “Autotractor” is 22 % less than the closest MTP variant based on the YTO NLX 1154 tractor. Keywords: mobile energy vehicle, autotractor, automobile chassis, economic efficiency, machine and tractor park, profitability, payback.

Purpose. To investigate the composition of the technological material, its technological load on the working parts of the combine, and to substantiate ways to increase the volume of corn cob harvesting by an axial-rotor combine.. Methods. Methods of scientific planning of experiments were used to determine the composition of the technological material and its technological load on the working bodies of the combine. Statistical processing of results were performed using a personal computer and mathematical software products using the following computer software packages: Microsoft Excel and StatSoft Statistica. Results. A set equipment for of the New Holland CR9.80 combine harvester for collecting corn cobs was developed and manufactured. The structure of the flows of process materials in the grain harvester during harvesting corn grain was studied. The density of the components of the non- grain part of the crop and their mixtures was studied. Conclusions. The research has shown that when threshing corn with a New Holland CR9.80 combine, about 48.1 % of the cobs from the total volume of corn rods enter the sieve, and the average length is 100–130 mm. With such cobs sizes and the use of a punched-type sieve with 50 mm diameter holes, only small part of the cobs enter the combine bunker. When the mass fraction of corn cob reaches 15–20 %, the bulk density of the grain-cob mixture will be 520–560 kg/m , i.e. it will decrease by 1.25– 1.35 times. In this case, the volume of technological material entering the combine bunker will increase by 1.5–1.7 times compared to harvesting only grain, with the same combine productivity. To significantly increase the volume of cobs entering the combine bunker, it is necessary to reduce the separation of cobs longer than 50 mm in the threshing zone and ensure their additional crushing in the separation zone of the threshing and separating device and, due to this, intensify the arrival of chopped cobs up to 25–50 mm long to the harvester sieve. Keywords: corn, harvester, sieve, corn-cob mix, harvesting.

Purpose. To describe the processes associated with the movement of cut grass stalks during the operation of a rotary drum mower and to establish directions for improving the process of forming a swath of grass. Methods. The methodological basis of research is the basic provisions of classical mathematics and agricultural mechanics, scientific developments of domestic and foreign scientists, achievements of practitioners in the problems of improving the quality of work, energy, and environmental efficiency of the drum rotary mower. In the research process, a set of methods is used, including: ­ monographic in the analysis of research on processes related to the operation of a rotary drum mower and the movement of mown grass stalks at the same time; ­ analytical when describing the processes of deviation and movement of individual stalks of cut grass. Results. The stalks of the grass stand are moved even before the start of cutting, namely, they are deflected by the cover of the protective apron. It was established that the amount of deviation along the width of the mower is different, and the tangents of the angles of the maximum and minimum value of the deviations are determined by dependencies (2) and (3), respectively. The process of stem movement after mowing is divided into stages, the characteristic zones in which mowing occurs are highlighted, the differences in the action of forces characteristic of these zones are characterized. The movement of the stem while lowering it to the surface of the disk for transportation is described, taking into account the properties of the stem and the action of the knife. The height of the rise of the stem after cutting and the time of its descent to the disk were determined. Conclusions 1. The process of interaction of the mower with the stalk from its deviation to the beginning of the descent from the disk for transportation is divided into stages. The movement of the cut stem at each of the stages is characterized. The stage of movement of the stem after cutting is described taking into account the mass of the stem and its properties (length of the stem, coefficients of friction and slippage). 2. The cut stems, touching the transport disk with the cut part, are placed on it perpendicular to the radius of the disk and transported in several layers. 3. For reliable capture and transportation of stems by disks, it is advisable to equip the latter with radial vanes that will grasp the stems in the direction perpendicular to the radius-vector of the disk and will not resist the descent of the stems to the periphery of the disk. Keywords: drum mower, stem, forces, sliding coefficient, stacking of the stem, disk for transportation, equation, center of mass.

Annotation Purpose. Harmonize parameters of technical means for chemical protection of crops of cereal grain crops and their feeding with solid mineral fertilizers under intensive cultivation technology. Methods. The technical characteristics of the existing technology for the protection of crops of grain crops and their fertilization with mineral fertilizers were analyzed analytically in order to harmonize the parameters of the specified means for the intensive technology of growing the specified crops. Results. By analyzing the specifics of the use of technical means for the chemical protection of crops of grain crops and their feeding with mineral fertilizers, specific recommendations are given for the harmonization of their parameters for the conditions of consistent execution of technological operations under the intensive technology of growing these crops. Conclusions 1. The working width of the existing technical means for the protection of crops of grain crops and their feeding with solid mineral fertilizers varies in a very wide range, which makes it difficult to consistently perform these operations, provided they move along technological tracks with a fixed distance between them. 2. The working width of the existing technical means for fertilizing grain crops with solid mineral fertilizers cannot be stable due to the throwing action of their seeding organs and the dependence of their work results on the action of the wind. 3. To overcome this negative and harmonize their parameters, it is necessary to use rod fat seeders with a fixed width of capture. Keywords: mineral fertilizers, plant protection, field ear crops, width of capture, technical means, technological parameters.

Purpose. Increasing the efficiency of agricultural production due to the creation of a reliable system of autonomous energy supply. Methods. Methods of system analysis and design of technical systems. Results. General principles of building an effective system of using natural and own renewable energy sources in agriculture. Methodology for determining and reliability indicators of possible variants of the generating unit of the autonomous electric power system. Conclusions 1. realities Ukrainian encourage the transition to autonomous production and use of various types of renewable energy. 2. Today, new systems of agricultural production are gaining dynamic application, the essence of which is complex automated human activity in close harmony with living objects, the work of which is possible only under the condition of absolutely reliable power supply. 3. The structure of the specific electricity supply system of the agro-industrial economy should be formed on the basis of the characteristics of production and household needs, assessment of the potential and characteristics of renewable energy sources and the conditions of safe, economically and ecologically efficient operation. 4. Based on the calculated reliability indicators and taking into account costs, a rational option for a farm can be considered an autonomous power supply system consisting of: a solar power plant, a biofuel power plant, a battery with a reliability index of 0.9997. Keywords: agricultura production, renewable energy, reliability, assessment.

Purpose. Creation and introduction into production of combined implements for vertical tillage Methods. Analytical, experimental, research and development. Results. A combined implements for vertical tillage has been developed and put into production. Conclusions. Two models of combined implements DCh-4.5 and DCh-3.0 have been developed for simultaneous shallow tillage to a depth of 12 cm and basic vertical tillage to a depth of 35 cm, which have a working width of 4.5 and 3.0 m. The DCh-4.5 model has been tested and is being manufactured for sale. Keywords: tools, soil, combined vertical tillage.

Annotation Puprose. Ensuring the sowing accuracy recommended for small-seeded vegetable crops with the modernized seeding device of the VESTA row seeder. Methods. Theoretical studies were carried out using the methods – analysis and synthesis of modern technical solutions, structural modeling and design; experimental research – experiment planning, mathematical statistics and analytical processing of experimental data. Results. Technical solutions have been developed to improve the VESTA pneumatic planter in order to ensure high-quality double-belt seed sowing of small-seeded vegetable crops. A prototype of the section of the seeding device was produced, its bench tests were carried out using the “moving belt” installation, and rational modes of the process of sowing small seeds were established, which ensure the recommended accuracy of its distribution. Production tests of the converted Selene universal seeder at the “Zorya Stepa” farm (Kodaki village, Obukhiv district, Kyiv region) confirmed the increase in the accuracy of sowing small-seeded vegetable crops. Conclusions. The results of experimental and production tests have confirmed that the proposed technical solutions for the modernization of the sowing apparatus of the universal VESTA seeder, in the design of the pneumatic vegetable precision seeder “Selena”, provide high accuracy of seed dosing of small-seeded vegetable crops and high uniformity of sowing and distribution of seeds without damage to the seedbed. This contributes to the survival and stability of the crop in the first days after sowing, which will reduce the cost of growing vegetables and increase yields. Keywords: small-seeded vegetable crops, precision sowing, universal pneumatic seeder, seeding device, modernization, accuracy of seed distribution.