Geoecological agricultural lands of the Altai region of the Republic of Khakassia Ekaterina V. Pavlova, Anastasiia I. Volkova and Ekaterina A. Demina E3S Web Conf., 223 (2020) 03012 Published online: 21 December 2020 DOI: 10.1051/e3sconf/202022303012