EN
The influence of inoculation with Azospirillum brasilense strain, two levels of nitrogen fertilizer, and seed treatment with fungicidal seed dressing on the development acid yield of maize were determined in field experiments. In these studies nitrogenase activity, chlorophyll content in plants, yield size and quality were used as control parameters. It has been found that inoculation of maize crops with an active strain of Azospirillum brasilense has a beneficial effect on maize vigour and yield under the climatic and soil conditions of the Wielkopolska region.