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| IZVORNI ZNANSTVENI ČLANCI |
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| Krpan, A. P. B., Poršinsky, T., Stankić, I. | UDK 630* 363 (001) |
| Efficiency of Mechanical Felling and Processing in Soft and Hardwood broadleaved stands – Part 3: Efficiency of harvester in natural thinning stands of hardwood broadleaf species
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EN
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495 |
| Kajba, D., Bogdan, S., Katičić-Trupčević, I. | UDK 630* 165 + 238 001. (Salix alba) |
| White Willow Biomass Production in a Short Rotation Clonal Test Dravica
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EN
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509 |
| Kremer, D. | UDK 630* 174 + 532 (001) |
| Morphometric Research of Leaves Characteristic of “American Ash” Acclimatized in Lowland Forests in Croatia
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EN
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517 |
| Posavec, S., Žgela, T. | UDK 630* 232.3 + 765 (001) |
| Calculating the Prime Cost of Forest Seedlings of Pedunculate Oak (Quercus robur, L.)
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529 |
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| PRETHODNO PRIOPĆENJE |
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| Šušnjar, M., Lukić, N. | UDK 630* 524 |
| Double-Entry Tables of Volume of Fir Trees from Forest Management Unit “Belevina”, Gorski Kotar
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537 |
Summary: The paper shows results of comparison of volumes of fir trees from forest management unit “Belevine” with volume of fir trees from Schuberg (1891) and Špiranec (1976) double-entry tables. The investigation sample are presented with 1.404 fir trees. Breast height diameters of the trees range from 20 cm to 85 cm while tree heights range from 12 m to 40 m. Sectioning of trees was done on all trees from the sample to preciously determine largewood volume (up to 7 cm diameter) of the trees over bark. Volume of trees up to 7 cm diameter over bark is presented with double-entries tables based on regression of data with Schumacher-Hall equation:V = 0,000075 · d 1,81567 · h 1,01588; sv.dh = 0,053 m3Timber volume increases with increasing of DBH and tree height. Volume of trees up to 7 cm diameter over bark ranges from 0,216 m3 for trees with20 cm DBH and 12 m height 10,167 m3 for trees with 85 cm DBH and 40 m height.Timber volumes from double-entries tables from forest management unit “Belevina” have the higher values than timber volumes from Schuberg (1891) and Špiranec (1976) double-entry tables. In comparison with calculated double-entry tables, Schuberg tables give the lower volumes for fir trees, especially for trees with DBH up to 70 cm. Comparison of calculated double-entries tables with Špiranec tables presents increasing of timber volume differences with increasing of DBH of trees. These differences are not in dependence on tree heights till 50 cm DBH, but onwards on thicker trees differences decrease with increasing of tree heights. Correction shows the need of increasing timber volumes by 1,81 % with using Schuberg tables or 5,56 % using Špiranec tables.
Key words: fir; timber volume; double-entry volume tables |
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| PREGLEDNI ČLANCI |
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| Pentek, T., Pičman, D., Nevečerel, H. | UDK 630* 684 |
| The Mean Wood Skidding Distance
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545 |
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| PRETHODNO PRIOPĆENJE |
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| Frković, A. | UDK 630* 156 |
| Forester Jaroslav Šugh, Esq. and his “Posavski Lovac” (“The Hunter Of Posavina”)
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559 |
