The study of the dynamics of physico-chemical properties of humic agronomic drugs

The article presents the results of physical and chemical properties of humic preparations, as well as the amount of humic acids contained in them. The acid content was revealed by the method of Velte, based on the deposition of humic acids and removal of fulvic acids from the solution and subsequent dissolution of the precipitate with alkali. Based on these results, a General conclusion on the changes in physic-chemical properties of the studied humic substances.