Vertex-IF for Corn — this is a liquid bio-preparation in the form of a bacterial inoculant. The preparation contains strains of bacteria: Pseudomonas fluorescens, Pseudomonas baetica, Pseudomonas xanthmarina, Pantoea eucalypti, Azospirillum brasilence and Azospirillum lipoferum. The amount of live cells of each of these bacteria is 2×106 CFU/ml, except for Azospirillum brasilence and Azospirillum lipoferum, where it is equal to 2×105 CFU/ml. The preparation is used to increase corn yield and protect crops from lodging. It is applied as a soil fertilizer or seed treatment. The recommended dosage is 1.5 liters per hectare when applied to the soil during sowing. For retail sale to the public, the dosage is 15 milliliters per 100 square meters. The preparation is produced by the company TOV "Terramax Ukraine", located in the Dnipro region, Krivhorodskyi district, village Niva Trudova. Vertex-IF for Corn promotes improved growth and development of corn through the action of beneficial bacteria, which enrich the soil and stimulate root system development. This allows for increased yield and reduced need for chemical fertilizers.