Evaluation of the effect of microbial preparations on productivity of corn in the steppe zone of the Altai territory

The action of biological preparations of associative nitrogen-fixing bacteria on corn of the Krasnodar 194 variety in the steppe zone of the Altai Ob region was studied. The positive effect of biologics in all years of research is established. The increase in the yield of corn from inoculation with monopreparations in different years was 1.7-9.1%. In drought conditions, with a decrease in yield, the effect of the drugs was higher than in wetter years. The effectiveness of drugs increased with their combination with Mycorrhizal 9.8-26.6% and against the background of mineral fertilizers, especially at a dose of N30P60K60 their effect increased to 101-120%. The most effective was the symbiosis of Mycorrhiza with Bioplant-K.