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Earthwork volume estimation for the construction of forest roads that would account for an ecological criterion

100%

Hruza P.

tom 23

nr 3

Technical elements, such as forest road networks, are inseparable parts of forest ecosystems. The current approach to the layout of a forest road network is largely based on technical and economic solutions and does not include an approach related to the forest ecosystem itself, which should be taken into account in the form of an ecological criterion. The aim of this work was to find out whether inclusion of the ecological criterion in the current method for the layout of a forest road network will affect the construction of forest roads and its economy. The inclusion of the ecological criterion is based on respecting forest stands with a high value of the real potential of forest functions within the accessed area so that these stands would be disrupted as little as possible and the real potential of forest functions would not be reduced considerably in consequence of the construction and use of the forest road network. The forest road network is therefore designed in the stands with a low value of the real potential. Specifically, we examined the changes in parameters of earthwork amount and we analyzed if the changes were statistically significant, and whether the spatial design of the forest road cross profile would change and how this change would be manifested in the construction of forest roads. The results showed that inclusion of the ecological criterion in the construction of forest roads causes only a slight increase in the level of the evaluated parameters of earthwork and thus also economic costs.

Strategic vectors of food production development in Serbia in terms of the global crisis

75%

Milovanovic R.

nr 3

12-14

The world economic crisis was a major factor that caused industrial production and trade over the globe decrease. It closed millions of working places and effected fear of political instability to spread even over the states that have been considered as stable. Economies all over the world face with wide range recessions, that will lead to the 3% to 7% GNP drop with respect to the last decade increasing trend. In such uncertainty conditions, where authorities are not sure about crisis development and duration, banner task is imposed: uncertainty must be passed. In Serbian economy, good model for crisis overcoming is agriculture strategic development and especially within it, the safe food production. One of guidelines of Serbian agriculture development is modernization and change of production structure towards stronger market orientation and improvement of alimentary industry total efficiency. Increased productively technological restructuring achieving increased efficiency, as well as greater competitiveness at domestic and foreign markets should be based on economical, ecological and energy criterions. Also, applied scientific research papers should allow significant increase of size and competitiveness of Serbian agriculture production.