SOYBEAN YIELD DEPENDING ON FROM THE PREDECESSOR AND METHOD OF TILLAGE IN THE NORTHERN FOREST-STEPPE OF THE TYUMEN REGION
The article presents data on the influence of the predecessor, method and depth of tillage on the productivity of soybeans in the Northern forest-steppe of the Tyumen region. Over the years of research, the average yield when sowing soybeans for three predecessors was greater for the predecessor spring wheat (the first after the occupied pair) - 1.08-1.30 t/ha on the main processing options - 20-22 cm, slightly less after annual grasses (occupied steam) - 1.06-1.28 t/ha and was 0.98-1.10 t/ha after the second spring wheat after occupied steam. The difference between the predecessors-annual grasses and spring wheat first after the occupied pair-was insignificant and amounted to 0.01-0.02 t/ha for the studied variants. The highest yield of soy was obtained by differentiated tillage (20-22 cm) with an excess over the control (dump treatment, 20-22 cm) of 0.05 t/ha after annual grasses and 0.06 t/ha after spring wheat first after the occupied steam. Determining the precursor and processing method for soybean cultivation, it can be recommended to place it after spring wheat first after the occupied steam in the crop rotation: annual grasses-spring wheat-soy using a differentiated processing method (20-22 cm).