The RIZOAKTIV preparation is a biological product containing viable cells of bulbous bacteria Bradyrhizobium japonicum or bacteria of the genus Rhizobium. The viable cell titre in the preparation is not less than 4.0 × 10^9 CFU/ml. The preparation is used for treating seeds of pea and soybean to increase their yield through fixation of atmospheric nitrogen. The bacteria promote the formation of root nodules, which provide plants with an additional source of nitrogen, especially important under conditions of soil deficiency in this element. The RIZOAKTIV preparation is produced by the Limited Liability Partnership 'Scientific and Production Enterprise 'Agroecology' in Ukraine. It is intended for use in the agricultural sector, where there is a need for natural improvement of soil fertility and enhancement of efficiency in cultivating pea and soybean crops. Use of the biological preparation helps reduce dependence on chemical fertilizers, making it an ecologically safe and cost-effective solution. Thanks to the use of live microorganisms, RIZOAKTIV ensures sustainable plant development at all stages of their life cycle. The preparation is easily compatible with other plant protection agents and fertilizers, allowing its integration into comprehensive agrotechnical systems. Its application contributes to improved crop quality, increased yield, and reduced fertilizer costs.