Nitrofix (SR) is a biological preparation in powder form, containing strains of Bradyrhizobium japonicum and Bradyrhizobium elkanii with a titer of 2.5 x 10^9 CFU/ml. The preparation is developed for use in the agricultural sector and is intended to increase plant yields. Nitrofix (SR) is applied as a seed treatment, promoting better root system development and increasing crop productivity. The manufacturer, LLC 'Bionaservice' from Ukraine, guarantees the quality and effectiveness of this biological preparation in agriculture.