Influence of the elements of cultivation echnology on the protein content in seeds and A relation between yield and protein content

The studies were carried out in 2018-2020 at the breeding plot of LLC Company “SOKO” in the central natural and climatic zone of the Krasnodar region. We studied five soybean cultivars of different maturity groups: ultra-early maturing - SK Farta; early-early maturing - Arleta, Sparta, SK Agra; early maturing -SK Optima. The purpose of the research was to establish the influence of agro-technical methods on the protein content in the seeds of soybean, as well as to conduct a correlation analysis of its relation with yield. The wide-row method of soybean sowing has an advantage over the ordinary one, both in terms of seed yield (on average by 0.4 t/ha) and protein yield (on average by 187.6 kg/ha). The late (summer) date of soybean sowing caused an increase of the protein content in seeds by 2.9% (abs.) on average for culti-vars. Irrigation for growing soybeans contributes to a significant increase in yield on average by 0.9 t/ha. The protein content in seeds was higher in irrigated areas and averaged 40.1% for cultivars. Correlation analysis of protein content and yield showed that the relation between these traits varies both from the growing area and the genotypic characteristics of the cultivar.