The paper examines the influence of complex biopreparation Rhizogumin components into the interaction activity between rhizobia andsoybeanplants.Itwasdetermined,thatthejointapplyingofinoculums with the phytohormones present in biohumus has activated the legumerhizobial interactions. The efficiency of the microbial preparation Rhizobofit and complex inoculant Rhizogumin was compared in field studies under the presence or absence of «local» populations of the rhizobia in the soil. It was

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... ed that a complex biopreparation has increased the efficiency of the symbiotic systems and ahs improved nitrogen metabolism of legume plants.