The effect of humic substances on winter wheat yield and fertility of ordinary chernozem

The effect of humic preparation BIO-Don on the productivity of winter wheat and soil properties has been studied in small plot and production experiments on ordinary carbonate chernozem. It was shown that pre-sowing seed treatment, the treatment of vegetative plants and soil with the preparation contributes to higher grain yields in comparison with the control variant. This effect is due to the presence of physiologically active substances - humic acids in the preparation. The positive effect on the high crop yield formation is also based on high availability of mobile forms of phosphorus on the variants treated with humic substances. This is due to the active control mechanism through root exudates and an increase in the number of microorganisms, which leads to mobilization of phosphorus by the plants that were treated with humic substances during the vegetation.