Soybean productivity with deep soil loosening before planting and application of pre-emergence herbicides

An experiment on the effect of soil deep pre-planting loosening to a depth of 34-36 cm and disk plowing to a depth of 14-16 cm with the application of herbicides Difilayn, 1.1 L ha + Algoritm, 0.5 L ha on soybean productivity was carried out on meadow chernozem-like soil. The research findings of 2021 and 2022 are discussed. The preceding crop was soybean. The planting rate was 750 thousand viable seeds per 1 ha; the distance between rows was 18 cm; the Maxus variety; planting in the second ten-day period of May. Deep soil loosening, disk plowing and application of herbicides were carried out on the day of planting. Deep soil loosening with PCh-4.5 chisel plough to a depth of 34-36 cm before planting ensures soybean yield gain by 13%. In combination with the application of pre-emergence herbicides Difilayn, 1.1 L ha + Algoritm, 0.5 L ha, it allows increasing soybean yield by 1.34 times more than when sown after soil disk plowing with BDM-9×2 disk harrow to a depth of 14-16 cm. The plants in this variant of pre-sowing tillage are well developed and have better productivity indices: height, seed number and weight per one plant.