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Abs Tr AcT: A pedological survey was carried out in a spruce monoculture, beech stand, and in a mixed stand at a field research station in Rajec-Němcice of the Institute of Forest Ecology (IFE), Mendel University of Agriculture and Forestry (MUAF) in Brno in the region of the Drahanska Upland in 2004-2006. The aim of the paper was to evaluate (i) humus reserves and forms, ( ii) soil reaction, ( iii) reserves of total carbon and nitrogen for the forest floor layers and () carbon/nitrogen ratio. Soil analyses were carried out on samples taken at the end of the growing season in a spruce, beech and mixed stand. The highest reserves of forest floor were found in the spruce stand (71.8 t/ha), which also corresponded to the exchangeable soil reaction 3.3 ± 0.4, the C/N ratio being 27.3 ± 3.0. The lowest reserves were found in the beech stand (46.7 t/ha), the soil reaction was 3.6 ± 0.5 and the C/N ratio was 26.0 ± 5.2. The mixed stand represented an intermediate value between extreme positions.

Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils