PHENOLOGICAL VARIABILITY OF CERTAIN SILVER FIR POPULATIONS (ABIES ALBA, MILL.) IN BOSNIA AND HERZEGOVINA
UDK: 582.475:581.45/.46(497.6 Olovo) Within this research phenological observation of leafing process on the trees in nine silver fir provenances was conducted. The trees are located in the area of „Krivaja“ management unit in section 86, department a, site „Delimusa“, spreading at the surface of 32,5 ha. The aim of this research is to determine the intra population and inter population variability of phenological features of nine fir provenances. Phenological researches were made in the period from 16 March to 23 May 2015. The following four phases were observed: A – winter bud, B – bud swelling, C – bud eruption and D – open bud. Results of research show that there is no statistically significant difference in the length oh the phases between individual provenances.