Physico-Chemical Properties of Soils in Lviv Volyn Coal Basin Area Vasyl Popovych, Kateryna Stepova, Andriy Voloshchyshyn and Pavlo Bosak E3S Web Conf., 105 (2019) 02002 Published online: 21 June 2019 DOI: 10.1051/e3sconf/201910502002