2025. Grouping of oriental tobacco of Krumovgrad and Basma (Greek) ecotypes from different regions and micro regions of Haskovo and Djebel tobacco growing area by important chemical indicators. Bulgarian Journal of Soil Science, Agrochemistry and Ecology. 59, 2 (Jun. 2025), 3–15. DOI:https://doi.org/10.61308/JHYS3631.