DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 9-10/2017 str. 21     <-- 21 -->        PDF

RESULTS
REZULTATI
Soil texture classes are clay loam, sandy clay loam, sandy loam, silt clay loam and clay in all land uses. The pH values of the forest, grassland and cultivated lands varied significantly from 5.4 to 7.3 (Fig. 4a). Agricultural and forest soils were found to be statistically significantly different in terms of pH values (p < 0.05).
When the dry bulk density (BD) values under different land use types are compared, the lowest value (0.95 g cm-3) was measured in forest soils and the highest value (1.36 g cm-3) was measured in agricultural lands. The differences in BD values of all LUTLC were found to be statistically significant with respect to the land use type (p < 0.05). This difference was not easily explainable but might be ascribed to the compaction of the topsoil due to overgrazing of the grassland (Fig. 4 b). On the other hand, it is also important to highlight that bulk density strongly correlates with SOM and organic carbon content (Hollis et al., 2006). Soils with higher SOM such as forest soils have lower bulk densities.
When the SOM amounts of the soils in the study area were compared, the differences between all LUTLC (forest – grassland, forest – cultivated area, and grassland – cultivated area) were found to be statistically significant (p < 0.01). The highest amount of SOM was measured in forest soils (16.7 %) and the lowest (3.1 %) was found in soils of cultivated lands. The differences in SOM amounts of forests and grasslands located in the north and the south aspects were found to be statistically significant (p < 0.01). Göl and Dengiz (2007) indicated that the aspect had an effect on the accumulation of SOM. The difference between SOM amounts of agricultural soils in both aspects was not significant.
The highest available water capacity (AWC) value (22.3 %) was measured in forest soil and the lowest value (14.4 %) in cultivated area soil (Fig. 5 b). The average value of AWC was measured to be 22.31 % in forest soils, 16.03 % in grassland soils, and 14.44 % in agricultural soils (Fig. 5 b).