Role of inorganic anions in the structural transformation of molecules of humic substances in soil

It was shown that inorganic anions of exogenic compounds affected the structure of humic and fulvic acids in gray forest soil, as well as the yield of humic acids and their contents of carbon and metals. Humic substances in arable soil more readily interacted with the anions of extractants and fertilizers compared to virgin soil. Changes were revealed in the energy state of the electronic system of P- and N-modified fragments of humic acids from the arable soil. New ligand groups and chelate nodes were found in modified fragments using differential electronic spectra.