Rizotaktiv is a biological preparation intended for use in agriculture. The preparation contains bacteria of the genus Bradyrhizobium japonicum eko/001, Bradyrhizobium japonicum eko/002 and Bradyrhizobium japonicum eko/003, with a titer not less than 2-3 x 10⁹ CFU/ml. The preparation is used for treating soybean seeds at a rate of 2.0 liters per ton (or 2.0 ml per kg) of seeds, once. Rizotaktiv is produced by the company Bionorma, located in the city of Kyiv, Ukraine. The preparation is recommended for use within agricultural technologies to enhance the efficiency of soybean cultivation through the biological action of the microorganisms it contains.