THE INFLUENCE OF THE CONCENTRATION OF LIQUID MINERAL MICROFERTILITIES (MICROMAK A) ON THE TABLE BEET FIELD GERMINATION AND PRODUCTIVITY DURING SOWING WITH SUBSOIL JET IRRIGATION

chernozem heavy loamy soils in 2016–2018. The studies used the methods of M. K. Kayumov, B. A. Dospekhov, V. F. Moiseichenko, and others. The sowing was carried out at the begin-ning of July with the “Maple” seeder equipped with a device for subsoil jet irrigation of seeds simultaneously with the sowing. The rate of jet subsurface irrigation was 1.2 cubic meters per hectare. After the seedlings appearance, irrigation was performed with a lateral sprinkler with irrigation rate of 400 cubic meters per hectare. The conducted studies allowed to set the optimal concentration of liquid mineral micronutrients (Mikromak A) at the jet subsurface irrigation of table beet seeds simultaneously with the sowing. The highest rates of growth and development were obtained in the variants of the experiment with a solution concentration of 0.1–0.15 % (field germination – 82.3–89.4 %, plant height – 68.5–79.7 cm, leaf surface area – 55.8–61.7 thousand square meters per hectare, yield – 63.8–70.5 t/ha). The dependence of the influence of the liquid mineral microfertilizers concentration (Mikromak A) on the table beet field germination with jet subsurface irrigation during seeds sowing and the dependence of table beet productivity during sowing with jet subsurface irrigation on the concentration of liquid mineral microfertilizers (Micromac A) was determined. microfertilizers,