UDK 582.475:581.4(497.6 Olovo) The research has been carried out in a formal experiment with silver fir near Očevje-Olovo, with nine provenances originating from natural BiH population of 22 years of age. The research observed following provenances: communities from the area of Bugojno, Bosanski Petrovac, Olovo-Palež, Olovo-Klis, Pale, Konjic, Fojnica, Sokolac, and Prozor. The analysis of diameter on the root collar found that there are statistically significant differences among the provenances. It was also found that the biggest diameter on the root collar was on the provenances of Fojnica, with 75.6 mm, whereas the smallest was on the provenances of Olovo-Klis, with 65.2 mm. In terms of breast height diameter, some statistically significant differences were also found, so that the biggest diameter was on the provenance of Fojnica, with 47.0 mm, whereas the smallest value of this feature was on the provenance of Pale, with 41.6 mm. The analysis of the height of different provenances for the testing period, 1999 – 2005 (7 years), suggested statistically significant differences among the provenances. The biggest value was on the provenance of Bosanski Petrovac, with 407 cm, whereas the smallest height was on the provenance of Olovo-Klis, with 364 cm. The results obtained during this research provide valuable information, which can be used as indicators for successful differentiation of silver fir.

UDK 630*31/*32:621.936.6(497.6 Vareš)           621.936.6:621.892(497.6 Vareš) Chainsaw is the main tool for work, considering the terrain and soil in our country, in the process of the harvesting, and there is a big chance it will be the main tool in the future too. The goal of the research is to determine fuel and lubricant consumption of the chainsaw Husqvarna 372 XP, during the harvesting and making forest wood assortments, on the area of the Public enterprise forest, Vareš, section 37. During the research, 50 trees of the fir and spruce have been felled. Range of the diameter was from 8 to 76 cm, and the volume of the assortments was 86.16 m3. Volumetric method is applied in the measurement of fuel and lubricants, with precise determination of how much fuel it was in the thanks. Analysis showed that there is a strong correlation between consumption of the fuel and lubricant (L/m3) in relation to the size of the breast height diameter. Average fuel consumption in the process of logging and preparation was 0.104 L/m3, while the average consumption of lubricant was 0.023 L/m3. It is necessary to continue to pay great attention to the rationalization of consumption on fuel and lubricants, as well as reducing their harmful effects on humans and environment (introduction and usage of biodegradable fuels and lubricants).