Occurrence of Ulmus L. in the different forest site conditions of eastern Ukraine

The “Ukrderzhlisproekt” Ukrainian State Forest Management Planning Association Database by 2017 was analysed for Donetsk, Kharkiv and Sumy Regional Forest and Hunting Management Administrations (RFHMA) to recognize the distribution of forest-covered area, area with Ulmus sp. as a main forest-forming species, and area of subcompartments with Ulmus sp. in the stand composition by forest site condition (FSC) types. Forests of Donetsk, Kharkiv and Sumy RFHMA are located in 16, 17 and 16 FSC types, with Ulmus sp. in 14, 13 and 11 FSC types, and with Ulmus sp. as the main forest-forming species in 11, 9 and 8 FSC types, respectively. U. minor is the most common; U. glabra is the least common. U. pumila dominates in Donetsk RFHMA and is absent in Sumy RFHMA. U. laevis is most common in Kharkiv RFHMA. U. minor prefers fresh and dry fertile FSC. U. laevis in Donetsk RFHMA prefers dry and fresh fertile FSC types, in Kharkiv RFHMA fresh fertile FSC types, in Sumy RFHMA fresh relatively poor, relatively fertile and fertile FSC types. U. pumila In Donetsk RFHMA prefers dry relatively fertile FSC, in Kharkiv RFHMA fresh fertile FSC, in Sumy RFHMA fresh relatively poor FSC, fresh relatively fertile FSC and moist fresh relatively fertile FSC. U. glabra prevails in moist relatively fertile FSC types, and in Kharkiv RFHMA also widely spread in fresh fertile FSC types.