The article presents the results of research on the impact of sowing terms, pre-sowing treatment of seed with Rexolin and foliar fertilization of crops with multicomponent chelate micronutrients Rexolin and Brasitrel on the formation of soybean productivity and yield in the conditions of the Left-Bank Forest Steppe of Ukraine. The research was carried out at the experimental field of Poltava State Agricultural Research Station named by M.I. Vavilov of Institute of Pig Breeding and Аgro-industrial production of the National Academy of Agrarian Sciences. Field and laboratory experiments were carried out according to the tested methods. Conditions on soybean crops throughout the growing season due to the application of micronutrients for pre-sowing seed treatment and leaf spraying with the different sowing terms had a positive effect on the formation of the yield structure elements, as well as on the yield of the entire crop. The best productivity was provided by the soybean variety Terek on the plots with foliar fertilization with Brasitrel in combination with seed treatment with Rexolin: the number of beans per plant – 15.7–16.5 pcs., the number of seeds per bean – 1.90– 1.95 pcs., the number of seeds per one plant – 29.8–32.2 g, weight of seed per one plant - 5.58–6.01 g, weight of 1000 seeds – 182.5–185.2 g. The highest productivity of 2.99 t/ha was provided by crops, where sowing was carried out at a temperature of 12 ° C at a depth of 0-10 cm, seeds before sowing were treated with micronutrient Rexolin, and foliar fertilization with multicomponent chelate micronutrient Brasitrel was performed during the vegetation
soybean; sowing terms; seed treatment; foliar fertilization; Rexolin; Brasitrel; yield structure; productivity