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The article presents the results of short-term field experiment for 2021-2023. The experiment is laid down in the hospital of agrochemistry and plant protection FSBSI FRARC. The effect of the use of potassium humate and the humic preparation BIO-Don on the content of mobile forms of phosphorus in the Calcic Chernozem during the cultivation of Alliance peas (Pisum sativum L.) was studied. The scheme of the experiment included options with the use of mineral fertilizer (azofoska 40:40:40) and without its use. Humic preparations were introduced foliar in a tank mixture with an insecticide during the bean formation phase and without the use of a chemical protection system. It has been established that the use of potassium humate and the humic preparation BIO-Don has a positive effect on the phosphate regime of the Calcic Chernozem. The application of azofoska mineral fertilizer in combination with the use of humates in a tank mixture with an insecticide contributes to the accumulation of mobile forms of phosphorus, which allows the soil to be classified from "elevated" to "very high" in terms of P2O5 content. Keywords: CALCIC CHERNOZEM, HUMIC PREPARATIONS, BIO-DON, POTASSIUM HUMATE, PEAS, MINERAL FERTILIZER, MOBILE FORMS OF PHOSPHORUS
Kartashev et al. (Fri,) studied this question.