The influence of meteorological factors on the yield and grain quality of soybean varieties belonging to different groups of ripeness in the conditions of the Stavropolupland

Soy is a unique leguminous crop, the grain of which used by processing industry for production protein concentrate, vegetable fat, biofuels, and concentrated feed. The experiments were laid in 2008-2011 2017-2019, at experimental station Stavropol State Agrarian University. Soybean varieties sown: precocious - Lira (St1) Selecta 101, early-ripening Duar (St2) 201, medium-ripe Vilana (St3) 302. In conditions upland, duration growing season from germination to ripening soybeans group was 106 days, 119, middle-ripening 130 days. greatest dependence harvest July, yield 71.6% determined influence meteorological conditions. August, decreased, but still very noticeable, 51.5% amount precipitation active temperatures greater than 10 °C. soybean varied in: 1.49 1.52 t/ha, early–ripening 1.70 1.78 medium-ripened 1.64 1.77 t/ha. highest quality obtained variety (St2), crude content 41.3%, fat 22.3%. When this variety, 0.662 t/ha 0.357 obtained.