Humus characteristics of some Bulgarian soils
1997
Filcheva, E. | Raicova, L. | Petcov, P. ("N. Poushkarov" Institute of Soil Science and Agroecology, Sofia (Bulgaria))
The A horizon (0-25 cm depth) from 8 main virgin soils (Albic Luvisol, Mollic Luvisol, Luvic Chernozem, Calcic Chernozem, Vertisol, Chromic Luvisol, Fluvisol, Mollic Cambisol) have been studied. They are the main part of the arable lands in Bulgaria. Soil organic carbon, soil organic matter composition, total nitrogen and soil acidity have been determined. The results obtained show that studied soils are characterized with relatively high humus content, humus highly enriched with nitrogen, humic type of humus, Ca-complexed humic acids. To develop a sustainable agriculture it is necessary to conserve the native soil fertility, to limit the destructive processes.
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