Inoculant Primo CL – this is a biological preparation containing cells of nodulating bacteria Bradyrhizobium japonicum with a bacterial titre of 4.5×10^10 CFU/ml. The preparation is used to increase soybean crop yield. The inoculant is intended for seed treatment. It promotes the formation of symbiosis between the plant and bacteria, enhancing nitrogen absorption from the air, ensuring plant growth and development. Using inoculant Primo CL helps improve soil quality and increase soybean cultivation efficiency without chemical fertilizers.