Martin Nenov, E. Dimitrov, Toma Shishkov (2022). SOIL PROPERTIES OF PELLIC VERTISOLS UNDER CONVENTIONAL AND ORGANIC FARMING FROM SOUTHERN BULGARIA. SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Water Resources. Forest, Marine and Ocean Ecosystems, 283-290. https://doi.org/10.5593/sgem2022/3.1/s13.35