Yield formation of soybean varieties of different groups of ripeness under the influence of sowing methods and seeding rates

Purpose: to study the influence of sowing methods and seeding rates on soybean development productivity under irrigation conditions Rostov region soils. Materials methods. Field studies were carried out meadow-chernozem soils in 2020–2022. Experiment scheme was following: factor A – varieties: early ripening variety Selecta 201 medium 302; B with a row spacing 0.70; 0.45 0.15 m; C rate: 800, 600 400 thousand viable seeds per 1 ha. The accordance generally accepted methods, taking into account zonal features. Results. It has been determined that highest yield obtained variant m rate units/ha 4.69 t/ha, exceeds data control by 0.30 t/ha. Such an formed due high field germination at level 95 %, linear growth indicators 123 cm, leaf area duration 74.8 square meters/ha relatively plant green matter 7.06 is also possible single option 800 4.67 302 94 127 74.2 6.99 t/ha allowed form 4.87 m. Conclusion: comparative assessment showed best when culti-vating varieties method respectively.