M. Vasylenko, doctor of agricultural sciences Institute of Agroecology and Natural Resources The purpose. To investigate effect of new organo-mineral fertilizers and growth regulators of plants on microbiological processes in soil. Methods. Stationary and short-term field and laboratory probes. Conventional methods of probes are applied, as well as dispersing, correlative, and variational analysises are used. Results. At application of new organo-mineral fertilizers and growth regulators of

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... ts the content of general microbial mass in soil of rhizosphere of corn and soya bean increased, phytotoxicity of soil dropped, numerosity of microorganisms-amonificators decreased. Conclusions. Application of new OMF and GRP stimulated growth of nitrogen-fixing organisms, enriched soil with accessible to plants joints of nitrogen.