The following species were used to study the chemical composition on the black soil: Stipa pennata L., Inula hirta L., Galium ruthenicum Willd., Fragaria viridis (Duch.) Weston, Genista tinctoria (L.) Maxim., on the meadow solonetz--Filipendula ulmaria
Juss, Artemisia pontica L., Festuca sulcata (Hack.) Nym., Artemisia nitrosa Web., Plantago cornuti Gouan, Galatella biflora (L.) Nees.