Optimization of technology elements in soybean stubble crop in Uzbekistan

Abstract

Abstract Soybean, which is considered as valuable crop, is vitally important to solve the problem of increasing grain production and the protein in our country. In this research, the results of a study on the study of sowing dates and seeding rates of early-ripening and mid-ripening soybean varieties under conditions of irrigated typical gray fats were described. Field and laboratory methods were employed to conduct this research. Soybean stubble crops were carried out after harvesting winter wheat. Three sowing dates and three seeding rates were studied. Late sowing dates are used to determine the possible late soybean sowing dates that ensure grain yield. At early terms of sowing stubble crops, soybean varieties developed well, grew, and formed a grain yield and a certain quality of grain. According to the results, On average, over three years, seedlings of the Orzu variety, depending on the sowing time and seeding rates, appeared on days 9-11, the budding phase on days 21-25, and the flowering phase on 8-9 days after budding. The best grain quality in the Orzu variety was observed when sowing on June 15 with a norm of 500 thousand; in variety Uzbek-2 when sowing on June 15 with a norm of 300 thousand/ha.