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0.05). The most failure types were the rut (39%) and the least was rocky protrusions (8.7%). Results showed that the number of existing culverts were not sufficient and therefore could not conduct volume of water (P>0.05). The intervals of the installed culverts was 234 m which is inappropriate based on the standards.]]>
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0.05). The independent t-test showed that aspect had a significant effect on FRB (p<0.001). Analysis of variance indicated that slope had no effect on FRB (p<0.05), but elevation showed a significant difference in this regard (p<0.01). Considering the effect of topographic factors on the CI and FRB of Persian oak trees, it can be stated that in silvicultural operations, more attention should be paid to the topography of site and the trees characteristics.]]>
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N (25.16 ± 0.93 mg.g-1) > P (11.76 ± 0.36 mg.g-1) > Mg (2.73 ± 0.15 mg.g-1) > K (2.55 ± 0.27 mg.g-1). The results of nitrogen release and degradation of lignin showed that nitrogen release had a negative trend up to 180 days and then it was positive until the end of the period. Based on the stepwise regression the C/P and N were the only variables entered into the model which explained 85.8% of mass loss variation. In general, the results of this study showed that Iranian oak modified the soil nitrogen intermediately and has no high potential for humus production.]]>
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p. 361−371
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p. 373−387
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p. 389−402
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