UDK: 577.13:582  Plants produce a numerous and diverse secondary metabolites, organic compounds which are not essential and do not participate directly in the growth and development, but may have very important role in their adaptation and adjustment to particular environmental conditions. For humans, secondary metabolites are very important in medicine, pharmacology, food and cosmetics industries. The presence of eight types of secondary metabolites (anthocyanins, coumarins, emodins, fatty acids, phenols, saponins, steroids and tannins) in water extracts of leaves and barks of 25 broadleaf deciduous species from 15 families was qualitatively investigated by rapid phytochemical screening methods. According to literature data, in this study for the first time is determined the presence of six types of secondary metabolites in analyzed dendro species: anthocyanins in one species; both coumarins and phenols in five species; emodins in six species; saponins in eight species; and tannins in four species. Particular attention in further research should be given to Fagus sylvatica L., Populus tremula L., Quercus petraea (Matt.) Liebl., Robinia pseudoacacia L. and Sorbus aria (L.) Crantz. Since preliminary results of this study are promising it would be desirable both to identify active compounds and assess their potential antimicrobial and antioxidant activities.

UDK: 630*9(497.6 Unsko-sanski kanton)“2003/2013“ Investments in forest sector represent an important issue that is regulated by legislation. Legislative framework that regulate forest sector in the Federation of Bosnia and Herzegovina has been changing recently - from the Law on Forests of the Federation of Bosnia and Herzegovina (2002 – 2009), Forest Regulation of the Federation of Bosnia and Herzegovina (2009 – 2012) and finally cantonal Laws on Forests (2012 to date). Cantonal laws currently represent the only valid legislative documents that regulate forest sector in the Federation of Bosnia and Herzegovina. This paper analyse the investments in the public forests at the territory of Una-Sana Canton, managed by forest management enterprises "Unsko-sanske šume", within the period 2003-2013 in dependence of the valid legislative frameworks. Having in mind the various regulations that prescribed the financing of the biological investments, scope and structure of the performed activities together with the amount of invested funds have varied between particular periods. The biggest share in total investments to forest sector belongs to the silvicultural measures (66%) and forest road construction (17%). The analysis included the trend of realised biological investments and invested funds. It reveals the mutual incompatibility that causes the differences in unit costs of biological investments in various periods. This implies the need for creation and implementation of unique methodology for cost calculation respecting the basic principles of econometrics. Conducted analysis indicated that previous legislative frameworks did not prescribe appropriate financing model. One should bare in mind this fact during the prescription of new financing model in the ongoing proposal of new Law on Forests of the Federation of Bosnia and Herzegovina.

UDK: 630*52:311 Regular forest inventory on state owned forest delivers plenty of data and information enabling detailed insight in forest structure and quantities. Current methodology for forest assessment on private properties considers time-consuming, low-intensive terrestrial measurement and observation on scattered small forest stands distributed on hilly and plane position around complex of state owned forests. Here are evaluated two modeling techniques: ordinary least square (OLS) regression and geographically weighted regression (GWR) estimating growing stock quantities of point sample inside the smallest state owned forest stands (area less then 10 ha). Used material contained forest attributes local estimates from regular inventory distributed in unique management class: beech and fir mixed forest on deep silicate soil, environmental and transformed spectral Landsat 8 data. Obtained results pointed out statistical significance of normalized standardized spectral radiance of NIR and SWIR Landsat bands in regression models. The GWR estimates achieve up to almost 30% higher variability explanation then OLS models. Also, GWR showed wider range then OLS estimates with smaller prediction errors. Evaluation on sample stand level resulted in reliable estimates of particular species or groups and total mean growing stock for all small stands. Further research about potential of GWR and other geo-statistical techniques for forest attribute estimates on more intensive point sample inside small spatial unit and/or whole spatial unit is recommended.

UDK: 630*43(497.6 Konjic)“2009/2013“ Forests as one of the largest renewable sources in nature, are extremely important for human survival. They cover about a quarter of the Earth's surface and are the lungs of all living beings. Rapid technological development has significantly improved the life of a man, but also made a great contribution to the destruction of the natural balance, and reducing biodiversity. They represent a significant social wealth not only by producing precious and for its quality values in many ways irreplaceable wood material, edible and medicinal plants, but also because its existence is a very positive impact on the protection and improvement of the environment, regulation of climate and water regime, reducing damage from erosion, flood and spate, development of recreation, tourism, hunting and many other economic activities. Fires are one of the strongest and most dangerous agents that man were served in suppressing forest since ancient times, but unfortunately still used today. In many parts of world man suppresses forest and brush with fires, creating a short-term favorable conditions for its economy. Research that are the subject of this paper is an analysis of the volume of forest fires in the period 2009-2013 year in the municipality of Konjic. The conducted analysis in this area in the period 2009-2013 year recorded 37 fires. Of that number, 20 fires were in the category of crown-fires and 17 ground-fires. The largest number of fires was 14 in 2011, with 310 hectares of fire-affected areas, while the lowest number was recorded in 2010, only three fires and burnt area amounted to 7 ha.