In the years 2009-2011 field experiment was carried out, whose aim was determination of reaction of two white lupine cultivars to bacterial inoculation, Nitragina. It was found that the applied inoculation prolonged stages of budding and flowering by two days and the stage of maturity (technical and full) by three days compared with the control (without Nitragina). Under the effect of Nitragina, the number of pods per plant increased significantly as well as the number of seeds per pod, however the weight of 1000 seeds did not change. The result of the use of bacterial inoculation was a significant increase in the seed yield by 0.29 Mg·ha^-1, i.e. 9% compared with the control. Yields of both cultivars were high, on average 3.38 Mg^.ha^-1 in the years of research. Protein content in the dry weight of seeds increased by 2.7% after inoculation of seeds with bacteria, compared with seeds from the control. In the seeds of both cultivars total protein concentration reached a statistically similar level.

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