Handbooks on corrosion resistance of materials are compiled mainly for pure chemical substances, and that makes k difficult to use them where multicomponent technological media are concerned. The data of handbooks on corrosion arranged according to kinds of chemical production [1] are obviously unsatisfactory because of the many new technological procedures of obtaining chemical products and the intensification of chemical technologies attained in recent decades.On the basis of experimental data from a number of Ukrainian scientific research organizations dealing with the corrosion resistance of structural materials in technological media in chemical production, the automated data and search system ~Korroziya" (DSS ~Korroziya")* was worked out; it is intended for introducing data bases on the corrosion resistance of metallic and nonmetallic materials, protective coatings, and for the operative supply of reference data according to the users' requirements.The DSS ~Korroziya ~ is based on a personal computer type IBM PC XT/AT with an internal memory of at least 640 kbyte, having a hard disk of at least 10 Mbyte. The software for the DSS ~Korroziya* was worked out with the aid of the system for the control of databases "Klipper. ~The information stored in the DSS ~Korroziya" has a hierarchic structure. At the uppermost level of the hierarchy is information on the literature source. At the subsequent levels are data on production and processes (technological stages, devices). Each literature source may contain data for several kinds of production, and the latter, in turn, may contain data for several processes. Each process (stage, device) is characterized by parameters such as composition of the reaction medium, pH, temperature, pressure. For a certain process the characteristics of the tested metallic and nonmetallic materials are given: the brand of the material, the state of the metal (solid, welded, heat-treated, etc.); the following information is also given: industrial or model tests, duration of the tests (in hours), nature and rate of corrosion, changes of the physicomechanical properties of the metal, nature of the corrosion products, changes of the reaction medium after the tests, methods of enhancing the corrosion resistance of materials. For nonmetallic materiaIs data on the change of weight, the state of the surface of the material, changes of mechanical indices, and an estimate of the durability were introduced. The data on the reaction medium are complemented by indices of aggressiveness of the medium (components determining the corrosion of materials, activating and passivating components), by information on mixing, phase state (liquid, gas).The most important data on the reaction medium and materials are coded (names of chemical substances, brands of materials, nature of the corrosion, etc.).The DSS ~ Korroziya" uses various alternatives of the basic function of data search according to the user's requirements. For the simplest single-factor search one search element is specified (a fragment of the ...

Relevance. One of the key tasks in the cultivation of seed potatoes is to obtain the optimal level of yield, the quantitative output of the standard fraction of seed tubers and ensure the quality of seed potatoes at the level of regulatory requirements of the standards set for the respective seed categories. In order to obtain a quality seed, it is necessary to form such a crop that its structure had the largest amount of seed standard fraction of tubers, and plants were less affected by viral infection. Methods. Studies on the effect of different doses of mineral fertilizers and the timing of the mowing of top on the output of seed potatoes of the variety Evpatiy were conducted in 2018–2020 on the experimental fields of ISA. The technology of cultivation of the new variety was studied in the crop rotation: peas — winter wheat + runchweed — potatoes — spring wheat. The area of experiment is 0,25 hectares, the accounting area is 10 m2, the repetition is fourfold. Soil of the site: dark gray forest heavily sougly; humus content 4.7%, potassium — 18,4 mg/100 g of soil, phosphorus — 22,3 mg/100 g of soil; soil pH 5,0. Experiment scheme: introduction of mineral fertilizers before planting and mowing top after flowering: N96P96К96 — 30 days, N96P96К96 — 45 days and N128P128К128 — 30 days, N128P128К128 — 45 days.Results. On the version with the introduction of mineral fertilizers N96P96К96 before planting and mowing tops 30 days after flowering, a tuber yield of 30.8 t/ha was obtained, with a yield of seed tubers of 37.3%. On the version with the introduction of mineral fertilizers N96P96К96 and mowing of tops 45 days after flowering, a tuber yield of 34.8 t/ha was obtained, with a yield of seed tubers of 42.2%. The use of mineral fertilizers with a rate of consumption N128P128К128 before planting and mowing tops 30 days after flowering contributed to the yield of tubers of 34.3 t/ha, with a yield of seed tubers of 45.6%. On the version with the introduction of mineral fertilizers N128P128К128 before planting and mowing tops 45 after flowering a tuber yield of 36.7 t/ha was obtained with a yield of seed tubers of 42.2%.

Relevance. Over the past 15 years, a large variety of crops, including barley, has been observed in the fields of the region, which, unfortunately, is not in favor of domestic varieties. The most important task for the next decade is not only import substitution with competitive varieties of domestic breeding, namely, providing the agro-industrial complex with seeds of varieties of domestic breeding.Methods. The object of research was commercial varieties of spring barley Vladimir, Yaromir, Reliable, Noble and Raphael, of various uses.Results. Quantitative characteristics of the selected elite ears revealed that the largest ear length (8.2–8.4 cm), the number of grains in the ear (24.4–25.2 pcs.) and the weight of grain from the ear (1.26–1.28 g) were characterized by Yaromir and Noble varieties. Rigid rejection of elite plants and rejection of families in PIP-1 (up to 72.1 % on average) make it possible to obtain high-quality conditioned barley seeds for laying PIP-2. The grain obtained from the nurseries of primary seed production differed in size. The weight of 1000 grains varied by year in PIP-1 from 50.4 g (Yaromir variety, 2021) to 58.9 g (Noble variety, 2020), in PIP-2 from 47.2 g (Raphael variety, 2021) to 53.3 g (Noble variety, 2022). The highest yields were characterized by varieties of modern breeding — Noble (from 4.04 to 5.50 t/ha) and Raphael (from 4.29 to 7.65 t/ha). Over the years of research, all varieties had a high yield of conditioned seeds (VKS, %) — more than 75.0%. The maximum indicators were Yaromir and Noble varieties, having VKS of 77.9 and 78.6%, respectively. The original seeds obtained had high purity (99.76–99.96%) and germination (98.0%).