VOZNIAK V. Продуктивність сортів сої різних агроекологічних груп залежно від строків сівби і норм висіву насіння в зрошуваних умовах південного степу України

The scientific novelty consists in the solution of an important scientific task regarding the study of the influence of the elements of cultivation technology on the grain productivity of soybean varieties of different maturity groups. The practical significance lies in the identification of soybean varieties of different maturity groups of Ukrainian selection with increased yield and adaptive potential for irrigation conditions in the Southern Steppe of Ukraine. The purpose of the dissertation research was to study the nature of the influence of the main elements of the organic technology of growing ornamental sunflower (hybrid composition and seed sowing rate) on the quantitative and qualitative indicators of crop productivity (dried petals of male flowers). Object of research: processes of growth, development, formation of productivity, economically valuable processes of growth, development, photosynthetic activity, formation of productivity of soybean varieties of different maturity groups on irrigated lands of the Southern Steppe of Ukraine. Subject of research: formation of grain yield of soybean varieties of different maturity groups by optimizing the elements of cultivation technology under conditions of sprinkler irrigation in the Southern Steppe of Ukraine. Methods: historical retrospective, field, laboratory, calculation, statistical, calculation-comparative. The program is "Agrostat". Introduced into the practice of production activity – farming and "VYKO" Novotroitsky district of Kherson region on a plot of 40 hectares.