Influence of biochar on the soil structure and the content of potassium forms

The results of the laboratory experiment on the effect of biochar on the content of various forms of potassium and the structure of gray forest medium-loamy soil during incubation for 42 days at optimum humidity are presented. The object of the study was a birch biochar obtained with the use of a fast pyrolysis plant from crushed waste plywood production. It was shown that the introduction of birch biochar into the soil resulted in the increase in the content of aggregates of the optimal size according to dry sieving measures. The best results were obtained with the biochar dose of 10%. Introduction of birch biochar into the soil resulted in the enrichment of its water-soluble, exchangeable and reserve potassium forms. The total content of potassium did not change.