The Xth International Agriculture Symposium "AGROSYM 2019" was held on 3-6 October 2019, in Jahorina, Bosnia and Herzegovina. Dr. Ina Aneva, member of the BIOGEA project team, presented a poster entitled "Land use and plant biodiversity in two regions of Bulgaria". It summarizes the results of a two-year assessment of plant diversity in different types of agricultural and forestry territories, ranging from cereal fields to fruit orchards and from coppice forests to protected territories. The two-year studies took place in two regions in Bulgaria – the first one was in the Thracian plain between Plovdiv and Pazardzhik, and the second one – Western Stara planina and the adjacent territories. A structural analysis of plant diversity was performed in experimental plots, representing more than 30 land use types. The results revealed that character of plant diversity depends on numerous factors; however, the most important being the land use type.