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Search Results: 1 - 10 of 461424 matches for " Bankovi? Stani?a "
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Sustainable forest management in Serbia: State and potentials
Medarevi? Milan,BankoviStania,?ljuki? Biljana
Glasnik ?umarskog Fakulteta , 2008, DOI: 10.2298/gsf0897033m
Abstract: Starting from the internationally adopted definition of sustainable forest management, this paper points to the demands of sustainable forest management that can be satisfied by meeting the definite assumptions. The first part presents the objectives of forest and woodland management planning and utilisation, hunting management, and protection of protected areas, as well as the all-inclusive compatible goals of forest policy in Serbia. The second part presents the analysis of the present state of forests in Serbia, in relation to the Pan-European criteria for the assessment of sustainability, and the potentials of our forests to meet all the demands.
Form of beech trees in coppice forests of Fru ka Gora
BankoviStania,Medarevi? Milan,Panti? Damjan
Glasnik ?umarskog Fakulteta , 2004, DOI: 10.2298/gsf0490053b
Abstract: The study of tree form - form factors and form quotients and their interrelationship and the relation with other elements of volume is a necessary precondition for the construction of volume tables by the increasingly applied indirect methods. After the magnitudes of these parameters of tree form were defined, we studied the correlation between normal form quotients and normal form factor, between normal form factor and tree diameter and height, and between normal form factor and artificial form factor.
Reliability of information on the growing stock as the base of real forest management planning
BankoviStania,Medarevi? Milan,Panti? Damjan
Glasnik ?umarskog Fakulteta , 2002, DOI: 10.2298/gsf0286067b
Abstract: The reliability of information on the growing stock state is the basic prerequisite of real forest management plans. In this sense, practical works on forest management, including data processing, which creates the information base in forestry, should be carried out in the most correct way, disregarding the numerous problems (subjective and objective) which result from the conditions in which the works are performed. Improvisations in any phase of the works, as illustrated by the example presented in this paper, create a wrong idea on the forest state, which further results in unreal and inadequate forest management plans. In all situations in which the data in plan documents do not agree with the real forest state, disregarding the increased financial expenditures, the works on forest management should be revised and plan documents should be made. In this way, we eliminate the potential consequences which would result from the realisation of the planed works based on unreal forest state, which would be reflected both in the economic and in the ecological senses, without the possibility to remove the consequences in a short time period.
Regression models of volume increment percentage in the Most represented stands of coniferous tree species in Serbia
BankoviStania,Medarevi? Milan,Panti? Damjan
Glasnik ?umarskog Fakulteta , 2002, DOI: 10.2298/gsf0285025b
Abstract: Considering the great significance of volume increment in forestry, it is understandable that there are numerous methods of its assessment. However, all these methods have some disadvantages, either the accuracy of the obtained results, too large scope of works of forest inventory (economicity), or the restriction only to stands of certain silvicultural type. To make the method of stand volume increment more economic and simplified, we defined regression models for volume increment percentage assessment in fir, spruce, Austrian pine and Scots pine stands in Serbia. Empirical data were fitted by four regression models for each tree species. The criteria for the final selection of models for the determination of volume increment percentage were the relevant statistic parameters of regression and correlation analysis, and the degree of concordance of "real" and fitted ("table") values of volume increment percentage. The selected models for the above tree species are Fir Spruce Austrian pine Scots pine In the practical work of the assessment of current volume increment in the stand, in regular forest inventories, the method of volume increment percentage should be implemented with correction factors for the fitting of "table" (obtained by this method) values of volume increment and "real" values (obtained by the method of diameter increment), on at least 10 % of the stands of the same or similar stand class (same or similar tree species and stand form). In this way, the costs of forest inventory would be reduced, and the obtained results would range within the limits of the required accuracy .
Form of turkey oak tree stems in coppice forests of Fru ka Gora
BankoviStania,Medarevi? Milan,Panti? Damjan
Glasnik ?umarskog Fakulteta , 2007, DOI: 10.2298/gsf0795023b
Abstract: The study of tree stem form-form factors and form quotients, and their dependence, and the relation with other volume elements is a necessary precondition for the construction of volume tables by indirect methods, which are increasingly applied. After determining the magnitudes of the above indicators of tree stem form, this paper studies the correlation between normal form quotients and normal form factor, then the correlation between normal form factor and tree diameter and height, as well as the correlation of normal and artificial form factor.
The possibilities of using group regression in the analysis of the diameter structure development in selection forests of Tara
Mitrovi? Slobodanka S.,BankoviStania
Glasnik ?umarskog Fakulteta , 2002, DOI: 10.2298/gsf0285079m
Abstract: Based on the presented study results, it can be concluded that the distribution of tree numbers per diameter degrees (diameter structure) in the four measurements of the compartments 51 and 75, did not change. It was also concluded that one functional dependence could be applied for both compartments N=e5,9·e–0,39*d The result of the above is that also in the following measurements, the diameter structure will remain unchanged, in cases of the same or similar selection cuttings both by the scope and by the distribution of felled trees per diameter classes The primary objective of this type of study is to predict, based on a mathematical model of diameter structure development, effect of the scope of selection cuttings and the number of recruitments on the diameter structure, and the simulation of growth, the distribution of trees per diameter classes in the following measurement or measurements, i.e. to foresee the future development of selection stands.
The growing stock of the Republic of Serbia: State and problems
BankoviStania,Medarevi? Milan,Panti? Damjan,Petrovi? Nenad
Glasnik ?umarskog Fakulteta , 2009, DOI: 10.2298/gsf0900007b
Abstract: Based on the data of the National Forest Inventory, this paper presents the basic characteristics of forest ecosystems in Serbia by different qualitative and quantitative parameters. The following parameters were dealt with: land use, forest ownership, origin, naturalness, preservation status, mixture and structural form of forests, percentage of tree species, stand category, volume distribution by diameter degrees, as well as the quantity of dead wood and carbon stock in the forests of Ser-bia. The analysis of the presented state enables the definition of some of strategic problems which individually and acting together burden our forest ecosystems, and whose detailed elaboration, measures and methods of enhancement will be fully expressed in the highest planning document - National Forest Programme. A special section, but without being sufficiently analytical, presents the main data on the growing stock of the Autonomous Province Kosovo and Metohija taken from the Report of the Norwegian Forestry Group.
State and silvicultural problems of beech forests in Northeast Serbia
Krsti? Milun,Medarevi? Milan,Stojanovi? Ljubivoje,BankoviStania
Glasnik ?umarskog Fakulteta , 2002, DOI: 10.2298/gsf0286161k
Abstract: The state and silvicultural demands in beech forests of northeast Serbia were studied in the economic regions of Severni Ku aj, Timok and Ju ni Ku aj, and in the region of the National Park erdap. The detailed analysis of state forests was performed: representation of beech forests according to silvicultural form, origin, age structure, stand state and productivity Average volume in high beech forests of 218 m3 x ha–1 is for about 5% lower than the average in Serbia (207.2 m3 x ha–1), and it amounts to 87% of the optimal volume of beech forests in Serbia. Volume increment of 4.5 m3 ha–1 is approximate to the average increment of high beech forests in Serbia, and it amounts to 75% of the optimal value. The average volume of coppice beech forests of 150 m3 ha–1 is 60% of the optimal volume of beech forests in Serbia The age structure is unfavourable, because the percentage of well conserved mature stands is only about 8%. Unplanned regeneration has started on about 15% of the area. Middle-aged and maturing stands account for more than 3/4 of the total area (80%). Stand state of beech forests in this region can be assessed as close to unsatisfactory, if the criteria are conservation, origin, vitality, and also the health state Based on the above state, the concrete silvicultural demands for each silvicultural situation were determined and the silvicultural measures were proposed aiming at their rational utilisation and improvement of forest state: measures aiming at the establishment of new, quality stands and measures aiming at the improvement of the state of existing forests.
Structural, production and dynamic characteristics of the strict forest reserve “Ra anska ljivovica“ on mt. Tara
Panti? Damjan,Medarevi? Milan,BankoviStania,Obradovi? Sne?ana
Glasnik ?umarskog Fakulteta , 2011, DOI: 10.2298/gsf1103093p
Abstract: Mixed forests of broadleaves and conifers, thanks to their high productivity and high biodiversity, are the most valuable part of the growing stock in Serbia. The aim of this research was to analyze the mixed old-growth forests of fir, spruce and beech in the reserve “Ra anska ljivovica“ so as to define the laws which could be applied in the future forest management on Mt. Tara. The research was based on the data of six periodic complete inventories followed by standard dendrometric and statistical processing. Forest structure was similar to the typical selection structure. The recruitment dynamics (except beech) was relatively favourable, with the ratio to dead trees amounting to 1.72. The number of trees and the volume increased constantly, attaining 422.2 trees ha-1, i.e. 800.3 m3 ha-1, and the volume increment was above 12 m3 ha-1, despite a slight drop. Silver fir was the protagonist of the selection structure and productivity. It is necessary to stimulate the survival and development of beech at the concrete site, to examine the balanced number of trees and volume, and to investigate the relationship between the number of recruited trees and the stand volume.
Dendrometric, phytopathological and entomological characteristics of a wych elm tree on mt. Go
Medarevi? Milan,BankoviStania,Karad?i? Dragan,Mihajlovi? Ljubodrag
Glasnik ?umarskog Fakulteta , 2011, DOI: 10.2298/gsf1104125b
Abstract: Valuable broadleaves, including also wych elms, belong to the category of rare tree species in the growing stock of Serbia. The conservation of Serbian forest diversity and the genetic potential of these tree species require a multidisciplinary study. In this respect, we undertook a dendrometric and health analysis of a wych elm tree on Go , as it is a rarity by its dimensions, not only from the local, but also from the regional aspects. The tree is 266 years old, its diameter at breast height is 2.09 m, height 42.1 m, and volume (d>3 cm) 56.35 m3. Current height increment culminated early, at the age of 20-30 years, attaining 0.5 m, and current diameter increment at the age of 40-50 years when its value was 14.4 mm. The above data point to a high productivity of this elm tree and to favourable site and stand conditions of its development. On the other hand, its current diameter increment and height over the last period (1.7 mm, and 0.03 m respectively) indicate that the tree was in the phase of physiological dying. 10 species of fungi were identified on the tree (facultative parasites or saprophytes), the most significant being Armillaria mellea and Aurantioporus fissilis, which caused central heartwood decay. Other fungi developed saprophytically in the dead part of the stem or in dead branches. Eight insect species (secondary and tertiary pests) were identified, including the two most dangerous elm beetles (Scolytus scolytus and S. multistriatus). Together with the species Saperda punctata and Cerambyx scopolii, they accelerated the dying process of twigs and branches, as well as of the whole tree. Ambrosia beetle Xyleborus monographus infested the stem and the large dead branches and caused minor technical damage in wood. The species Dorcus paralelopipedus, Oryctes nasicornis and Valgus hemipterus supported the faster progress of wood-rotting fungi and thus contributed to physiological weakening and shortened the life cycle of the study elm tree.
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