Romanko A. Formation Of Soybean Productivity Depending On The Elements Of Cultivation Technology Under The Conditions Of The Northeastern Forest-Steppe Of Ukraine

In the thesis, the theoretical generalization and the solution of a scientific task concerning the optimization of technology of cultivation of soybeans are presented. The technology is based on the study of such factors as plasticity and stability of varieties for growing in different soil and climatic zones, the influence of anti-stress growth regulators on soybean performance in the northeastern Forest-Steppe of Ukraine. To increase the efficiency of cultivation and stability of economic indicators of soybean culture in Ukraine, we recommend using in the Sumy region the early-ripening (Asuka), early-season (Merlin, Kyoto), and midearly varieties (Lisbon). In the Ternopil region – the early-ripening (Kofu), early-season (Kyoto, Merlin), mid-early (Cordoba), and mid-ripening varieties (Kent). In the Mykolaiv region –early-ripening (Asuka), early-season (Merlin, Kyoto), and mid-ripening varieties (Kent). Higher efficiency was revealed with double application of ВВСН 61+69where the highest average yield (3.07 t / ha) was obtained. With a single application of chemicals in ВВСН61– 2.97 t / ha, and ВВСН69– 2.86 t / ha. The maximum yield was obtained in the variant where Atonic Plus (3.32 t / ha) was used. Slightly lower yield capacity (from 3.0 to 3.24 t / ha) had the variants with the application of Stymulate and Megafol. The minimum yield increase from the control (0.26 t / ha) was obtained with the application of Albit TPS. The lowest seed yield was formed on the control (2.86 t / ha). The analysis of economic efficiency indicators revealed that the maximum levels of profitability (40–42%) were obtained with the application of growth regulators of Atonik Plus and Megafol. The maximum mass of profits per unit area (UAH 7,031 / ha) was obtained during the soybean cultivation applying the complex treatment of the growth regulator of Atonic Plus in the phase of ВВСН 61+69