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Harvesting of flax for fiber and seed production is carried out depending on the specific conditions by different technologies: direct, separate and factory. A technical and technological study of separate harvesting of flax fiber by improving the basic conceptual scheme of the picker-combing machine is presented. The traditional technologies of harvesting flax fiber and technical means that ensure the implementation of technological operations related to the separate technology of harvesting are considered. Disadvantages of the technical means used in the separate harvesting technology of flax fiber are revealed. They consist in varying degrees of impact of threshing and separating combing bodies of harvesting machines of both rake and rotor type on the stems, which causes uneven curing along their length and leads to the deterioration of fiber quality, reduction of the number of extra valuable long fiber and losses of the seed part of the crop. A conceptual scheme of the basic threshing and separating device of a roll-fulling type for separate technology of flax fiber harvesting by improving the picker- combing machine is proposed. The proposed device variant provides simultaneous threshing of flax fiber strips and creates favorable conditions for quality curing of straw to the state of flax straw simultaneously along the entire stalk length by its uniform conditioning in the gaps between the rubberized rollers. The combing header equipped with a threshing and separating device of the roll-fulling type allows to separate the seeds from the uncombed flax strip regardless of the location of the seed part relative to the movement direction of the harvesting machine. Versatility, simplicity and wide range of application of the threshing and separating device of the roll-fulling type are reasonable to use when designing machines for harvesting flax fiber for direct, separate and factory harvesting technologies.

Many options have been developed for the implementation of the algorithm for updating the fleet of grain harvesters to date. In accordance with the yield and other indicators, recommendations for the formation and renewal of the harvester fleet are proposed discretely in the form of tables or charts. This form of information does not always meet the requirements of operational correction and does not allow assessing the technological capabilities of the harvesting units, depending on the harvesting conditions. The method to improve the formation of the initial information for operational decision-making on the effective upgrading of technical means of grain harvesting complex taking into account the zonal features of a particular agricultural enterprise is proposed. A graph-analytical method for determining the main parameters of the basic harvesting tools depending on the predicted yield level is developed and the influence of the factors determining the composition of the grain harvesting fleet is assessed. This method makes it possible to identify the most rational basic parameters of alternative basic harvesting tools for a specific agricultural enterprise. The first step is to determine the basic parameters of the basic equipment, then select the appropriate size series of self-propelled threshers for combine harvesters and reapers. Further, alternative versions of various models of grain harvesting units and complexes are formed. For the subsequent selection of rational types of cleaning agents and their criterion assessment, technical and technological, environmental and other indicators are used. The expert-logical analysis of information resources makes it possible to identify and assess the factors that determine the quantitative composition of the technical means of the grain harvesting complex. The final stage in the formation of the initial information for making a decision on updating the technical means of the grain harvesting complex should be their economic assessment, which makes it possible to predict the competitiveness of the threshed grain.

Studies were conducted to improve the effi ciency of feed production technology in the form of high-moisture fl attened conserved grain by means of harvesting wheat with the use of stripping tools without threshing. The research objectives included an assessment of the quality and energy consumption of a single-rotor stripper header, depending on its operating modes, for harvesting high-moisture wheat plant mass. The implementation of resource-saving technologies for the feed production in the form of wet fl attened grain is constrained due to restrictions in traditional harvesters for direct grain harvesting in the phase of the beginning of wax ripeness. To solve the problem of effi cient harvesting of high-moisture grain, stripping working tools were proposed. The use of a single-rotor stripper header was justifi ed. To assess the technological effi ciency of stripping high-moisture wheat plant mass, experimental studies were conducted with the use of a bench model of a single-rotor stripper header. The results of changes in the quality indicators and the energy assessment of stripping of Novosibirsk-31 variety wheat stands were obtained, whereby the average grain moisture was 40% and the rotation frequency of the header stripping rotor was in the range of 330-650 rpm. A comparative assessment of the results of stripping wheat stands at the beginning of wax and hard ripeness was carried out. The research results showed the feasibility of using a single-rotor stripper header for harvesting the productive part of cereal crops at the beginning of wax ripeness for fodder purposes, including fl attening and subsequent conservation as the most rational way of processing high-moisture grain. The use of a stripper header as a forage harvester adapter will increase the effi ciency of resource-saving technologies for harvesting highmoisture grain and will expand agrotechnical period for harvesting grain for feed purposes.