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Relevance and methodology. The response of present winter triticale varieties to the nitrogen nutrition level was assessed at different seeding rates in the agro-climatic conditions of the Bryansk region. The research object was a set of new winter triticale varieties cultivated by intensive technology on gray forest tame soils in the Bryansk region.The purpose of the research was to identify the potential of crop capacity and grain quality of present varieties of winter triticale, depending on the mineral nutrition level and seeding rates. Field experiments were carried out in the educational and experimental farm of the Bryansk State Agrarian University in 2019–2021 with the following crop rotation system: vetch-oats mixture for green fodder, winter triticale, potato, spring wheat.Results. It was established that the grain yield of the varieties under study largely depended on the conditions of moisture and heat availability in the growing season. In the experiment variant with N168Р96К96 and additional fertilizing of ammonium nitrate and ammonium sulfate at the rates of N24 and N10 during spring vegetation and in the shooting stage, the varieties Tornado, Runo, Nina, Impulse, Tribune, Carnet and Legion were distinguished due to the producing programmed grain yield — from 85 to 100 ctw/ha. The grain yield of the varieties Dynamo, Nemchinovskaya 56, Promet and Valentin was from 83.3 to 84.4 ctw/ha on average. In the experiment years all the varieties under study formed stable yields and grain with a high content of crude protein and gluten. On tame soils, with high rates of mineral fertilizers and tank mix of herbicides, the seeding rates of winter triticale seeds can be reduced to 4.5 and 5.0 mln pcs of germinating seeds per 1 ha, therefore, these agrotechnical techniques can be recommended into production as the most important factor of increase of high-quality grain yield.

Relevance and methodology. Grain quality of crops is largely determined by the content and composition of proteins. The content of protein and amino acids in grain varies due to specific and varietal characteristics of the crop. The study of the effect of organo-mineral biological preparations on the yield and amino acid composition of grain of spring barley varieties proves to be relevant. The research was carried out in 2020–2021 in the conditions of experimental fields of the Bryansk State Agrarian University on gray forest medium loamy soil. The research object is spring barley varieties Raushan, Vladimir, Yaromir. The agricultural technique of cultivating spring barley is generally accepted for the region. There were the variants with biological preparations Geotone, Gumistim, Bioagro-PP, Bioagrogum-B, control (without treatment). The total nitrogen content in the grain was valued by the indophenol method and amino acids were assessed by capillary electrophoresis with the instrument "Kapel 105".Results. According to the results obtained, the highest grain yield of 6.82 t/ha and 7.35 t/ha of the barley varieties Vladimir and Yaromir was in the variants with Bioagro-PP, and the yield of 6.82 t/ha of the variety Raushan was in the variant with Gumistim. The application of biological preparations in barley cultivation contributed to an increase in the content of nitrogen in barley grain. It is established that the application of biological preparations contributed to an increase in the content of amino acids in the grain, including essential ones. Assessing the varietal characteristics of barley, it should be noted that the largest number of amino acids was in the grain of the variety Raushan, and the variety Yaromir had the smallest number. In the grain of Raushan the highest content of amino acids of 15.50 and 15.74 g/100 g of dry matter was recorded in the variants with Geotone and Bioagrogum-B.

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