Abstract
This article presents research on the effect of seeding rate on yields of domestic soybean varieties. Conclusions on the profitability of soybean varieties are drawn. The calculation of the economic efficiency of cultivating soybean varieties with different seeding rates is given. The high profitability of the soybean varieties under study, as well as the average yield of the soybean varieties by year of study depending on seeding rates is shown. Five mid-late and late-ripening soybean varieties Lastochka, Zhansaya, Ai Saule, Akku, and Aizere took part in the research. The varieties have been approved for production in the south and south-east of Kazakhstan. The results of all three years of research show the highest yields in all the varieties studied at a seeding rate of 600 thousand/ha. The most productive soybean variety was Ai Saule at a seeding rate of 600,000/ha. The soybean variety Aizere was the least productive with a yield range of 32.9-48.8 c/ha at a seeding rate of 200,000/ha. When using different varieties, taking into account sowing rates, the increase in cost per hectare varies between 216800 and 276200 tenge. The highest profit of 1145900 tenge per hectare was obtained in soybean variety Ai Saule.