Comparative Characteristics of Ferric Leptosols

Modern research in soil science provides an opportunity to improve soil diagnostics and improve the national classification of soils. Objectively, this becomes a fact when defining soil formation processes with certain features and characteristics. In soil science, the main principle for characterization and evaluation of soils is the genetic-diagnostic approach, which combines the morphology, the structure of the soil profile, the chemical, physico-chemical, physical and other indicators and properties. On this basis, there were changes in the names of soils in the new bulgarian soil classification (Teoharov et al., 2019) and based on the diagnostic characteristics of WRB (IUSS working group, 2015) new soil units were included. It was found that there are primitive and underdeveloped soils in the country, which have not been studied enough. The present study aims to establish the genetic-diagnostic characteristic of Nudilithic Ferric Leptosols and Ferric Leptosols formed on rocks with high iron content.