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  • 1
    Online-Ressource
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    Tree development and productivity of beech coppice stands in the Crni Vrh region
    National Library of Serbia ; 2003
    In:  Bulletin of the Faculty of Forestry Vol. , No. 87 ( 2003), p. 175-186
    Details
    In: Bulletin of the Faculty of Forestry, National Library of Serbia, Vol. , No. 87 ( 2003), p. 175-186
    Kurzfassung: U radu su prikazani rezultati proucavanja tokova razvoja i prirasta pojedinacnih stabala, kao i proizvodnosti izdanackih sastojina bukve na podrucju Crnog Vrha. Analizirana su stabla iz kategorije 20% najdebljih stabala u sastojini, standardnom dendrometrijskom analizom, a proizvodnost je utvrdjena na osnovu vrednosti osnovnih taksacionih elemenata dobijenih sa oglednih povrsina. Rezultati ovih analiza, u kombinaciji sa rezultatima istrazivanja drugih autora, koji su sa razlicitih aspekata proucavali izdanacke bukove sume na istom lokalitetu, omogucili su realno i sveobuhvatno sagledavanje stanja ovih sastojina. Na osnovu toga definisan je dugorocni gazdinski cilj (konverzija u visoki uzgojni oblik) i aktuelna uzgojna mera (visoka selektivna proreda).
    Materialart: Online-Ressource
    ISSN: 0353-4537 , 2217-8600
    URL: Article
    DOI: 10.2298/GSF0387175P
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2003
    ZDB Id: 2585444-6
    SSG: 23
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  • 2
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    Finding coefficients for correction of potential value of wood assortments in real on the example of beech from thinning cuts in Serbia
    National Library of Serbia ; 2021
    In:  Bulletin of the Faculty of Forestry , No. 124 ( 2021), p. 87-114
    Details
    In: Bulletin of the Faculty of Forestry, National Library of Serbia, , No. 124 ( 2021), p. 87-114
    Kurzfassung: Calculating the value of wood in forests has always been a job full of challenges for the appraiser, especially if in that case the condition is not to cut down trees. As one of the possibilities, the method of "model" cutting can be used, which is practically the only one that allows assessment value without cutting trees. It consists in estimating the volumes of assortment classes only on the basis of tree dimensions (d and h) and valid standards for forest exploitation products, and later, by multiplication with prices, the required value is obtained. As other characteristics of the tree (wood defects) are not taken into account in this procedure, it is obviously an ideal (maximum) value. In order to harmonize it with the real value, which is always lower than the "model" value, a request is imposed for the correction of the "model" value with appropriate coefficients. In this research, an attempt was made to obtain such coefficients for material from thinning in beech high (5,973 trees) and coppice (1,842 trees) forests and to check the degree of accuracy during their application.
    Materialart: Online-Ressource
    ISSN: 0353-4537 , 2217-8600
    URL: Article
    DOI: 10.2298/GSF2124087R
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2021
    ZDB Id: 2585444-6
    SSG: 23
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  • 3
    Online-Ressource
    Online-Ressource
    Opportunities for the application of linear program­ming in forest management planning
    National Library of Serbia ; 2013
    In:  Bulletin of the Faculty of Forestry , No. 107 ( 2013), p. 175-191
    Details
    In: Bulletin of the Faculty of Forestry, National Library of Serbia, , No. 107 ( 2013), p. 175-191
    Kurzfassung: In situations where it is necessary to consider a variety of options when making decisions in forestry (and in general), with the choice influenced by hardly comparable criteria and a number of conflicting interests, a possible solution is to use multiple criteria methods. One of these methods, which can be applied in forestry, is mathematical programming (in particular, linear programming). Linear programming has a long tradition of being used in the U.S. and European forestry, whereas in the forestry of Serbia it still represents a theoretically and practically unknown tool. Therefore, in this paper we analyze the possibility of applying the methods of linear programming in developing a plan of regeneration cutting in the poplar plantations of FMU "Topolik" managed by PE "Vojvodinasume." Using the aimed function (linear programming) and the corresponding software package the maximum yield that can be achieved by cutting the plantation was obtained. The planned management period was from 2012 to 2021 and its volume was 155 852 m3. The preset condition that the yield in half-periods remains equal was fulfilled (half-period I 77,925 m3, half-period II 77,927 m3). The maximum yield obtained with this methodology was by 4,040 m3 lower than the theoretically possible yield that would be obtained if all stands were cut down at the end of the second half-period, i.e. higher by 8,430 m3 than the yield that would be obtained if cutting of the stands were performed at the start of the management period. The results obtained and foreign experience in this area clearly indicate that linear programming can successfully be used to solve this problem and even more complex problems (than the one presented in this paper) in our local forest practice (multidimensional planning with a series of constraints).
    Materialart: Online-Ressource
    ISSN: 0353-4537 , 2217-8600
    URL: Article
    DOI: 10.2298/GSF1307171P
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2013
    ZDB Id: 2585444-6
    SSG: 23
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  • 4
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    Growing stock monitoring by European National Forest Inventories: Historical origins, current methods and harmonisation
    Elsevier BV ; 2022
    In:  Forest Ecology and Management Vol. 505 ( 2022-02), p. 119868-
    Details
    In: Forest Ecology and Management, Elsevier BV, Vol. 505 ( 2022-02), p. 119868-
    Materialart: Online-Ressource
    ISSN: 0378-1127
    URL: Article
    DOI: 10.1016/j.foreco.2021.119868
    Sprache: Englisch
    Verlag: Elsevier BV
    Publikationsdatum: 2022
    ZDB Id: 2016648-5
    ZDB Id: 751138-3
    SSG: 23
    SSG: 12
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  • 5
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    Online-Ressource
    Analysis of the growth characteristics of a 450-year-old silver fir tree
    National Library of Serbia ; 2015
    In:  Arhiv za bioloske nauke Vol. 67, No. 1 ( 2015), p. 155-160
    Details
    In: Arhiv za bioloske nauke, National Library of Serbia, Vol. 67, No. 1 ( 2015), p. 155-160
    Kurzfassung: The growth characteristics of silver fir are of high importance for selection forest management, and for the current aims laid out in Serbia?s forest management focused on increasing the share of silver firs in Serbia?s growing stock. With the objective of increasing the understanding of the growth characteristics of silver fir, the growth of two silver fir trees felled during forest site production research on Mt. Goc, located in Central Serbia, have been analyzed. Both trees showed significant differences in their growth dynamics over long periods as results of micro-site and micro-stand effects (primarily ambient light regime). The common growth characteristic of the two trees, a 450-year-old tree as the main study object (labeled Tree A) and a 270-year-old Tree B is a long stagnation stage. For Tree A the latent phase, with small interruptions, lasted 410 years; one phase lasted 330 years in continuity, which is the longest period of silver fir stagnation recorded in Europe. Tree B showed a long-lasting stagnation stage that lasted 170 years. The long stagnation stage of Tree A, characterized by an average diameter increment of 1.4 mm/year (average growth ring width of 0.7 mm) and an average height increment of 0.08 m/year, shows the extraordinary silver fir capacity for physiological survival in complete shade. This study adds to the existing knowledge of the shade tolerance of the silver fir. Therefore, the silver fir belongs to the group of extremely shade-tolerant tree species. This characteristic makes silver fir an irreplaceable tree species in the selection forest structure. It offers a wide range of silvicultural flexibility in the management of these forests, and is applicable to silver fir selection Serbia?s forests.
    Materialart: Online-Ressource
    ISSN: 0354-4664 , 1821-4339
    URL: Article
    DOI: 10.2298/ABS140919018P
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2015
    ZDB Id: 2380842-1
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  • 6
    Online-Ressource
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    Impact of Mixing on the Structural Diversity of Serbian Spruce and Macedonian Pine Endemic to Relict Forest Communities in the Balkan Peninsula
    MDPI AG ; 2021
    In:  Forests Vol. 12, No. 8 ( 2021-08-16), p. 1095-
    Details
    In: Forests, MDPI AG, Vol. 12, No. 8 ( 2021-08-16), p. 1095-
    Kurzfassung: The aim of this paper is to analyze the effect of different degrees of mixing on the diversity structure in stands left to spontaneous development. The research included two communities of species endemic to the Balkan Peninsula—the Serbian spruce (Picea omorika Pančić Purk.) and the Macedonian pine (Pinus peuce Griseb). Data from eight sample plots were used in the research. The changes in diameter and height structure, spatial arrangement of trees, and diameter differentiation were analyzed. The analyzed parameters of structural diversity show relatively low to moderate values. Results showed an increase in mixing was reflected in the width and shape of distributions. A spatial analysis of stands with a higher degree of mixing showed a tendency towards a random to regular distribution of individuals, in contrast to stands with a lower degree of mixing which showed a tendency towards a clump distribution. The pronounced species’ dimensional and spatial diversity confirms their importance to the condition of modern forest management. Significant differences in the change of structure are shown by stands with a share of admixed species of above 20% by volume. The obtained results refer to stands left to spontaneous development, suggesting than an active research and management approach must be assumed to realize the goal of protecting rare forest ecosystems.
    Materialart: Online-Ressource
    ISSN: 1999-4907
    URL: Article
    DOI: 10.3390/f12081095
    Sprache: Englisch
    Verlag: MDPI AG
    Publikationsdatum: 2021
    ZDB Id: 2527081-3
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  • 7
    Online-Ressource
    Online-Ressource
    CARBON STORAGE IN SHELTERBELTS IN THE AGROFORESTRY SYSTEMS OF THE BAČKA PALANKA AREA (SERBIA)
    National and University Library of the Republic of Srpska ; 2018
    In:  AGROFOR Vol. 3, No. 2 ( 2018-09-14)
    Details
    In: AGROFOR, National and University Library of the Republic of Srpska, Vol. 3, No. 2 ( 2018-09-14)
    Kurzfassung: Field shelterbelts as agroforestry practice provides numerous ecosystem services.Carbon capture and storage potential in biomass and soil is among regulatingservices shelterbelts provide. Designing shelterbelts to address the various demandsand provide services, requests special attention to choosing structural and spatialcharacteristics of shelterbelts, and species selection for shelterbelts. This paperpresents the research results of C storage in 20-years old shelterbelts established onGleyic Phaeozem in the area of Bačka Palanka (Serbia). Investigated shelterbeltswere consisted of the most commonly used species for shelterbelt establishment inSerbia: Siberian elm (Ulmus pumila L.), poplar (Populus x euramericana (Dode)Guin. cv. „Serotina“) and black locust (Robinia pseudoacacia L.). The diameter atbreast height (d) and the height (h) of all trees in studied shelterbelts weremeasured. Carbon stock in biomass was estimated according to IPCC (2003)methodology. Soil profiles were opened in studied shelterbelts with soil samplingcarried out at fixed depths of 0-10 cm, 10-20 cm and 20-40 cm. Assessment ofcarbon storage in soil was performed according to IPCC (2003). According to theresearch results, living biomass C stock in 20-years old Siberian elm and poplarshelterbelts per tree is almost the same 0.333 t per tree and 0.300 t per tree,respectively. In black locust shelterbelt carbon stock is considerable less 0.111 t pertree. However, in species selection for shelterbelts some characteristics should takeinto account such as adaptability and suitability to the environmental conditions,longevity and their impact on crops that are grown in the sheltered fields, as well asthe natural potential vegetation communities of the area. The results of this studyindicate that the poplar is preferred species than the Siberian elm in givenenvironmental conditions. The average carbon stock in the soil of studiedshelterbelts in a layer 0-40 cm is 9.33 kg m-2 C.
    Materialart: Online-Ressource
    ISSN: 2490-3442 , 2490-3434
    URL: Article
    DOI: 10.7251/AGRENG1802080L
    Sprache: Unbekannt
    Verlag: National and University Library of the Republic of Srpska
    Publikationsdatum: 2018
    ZDB Id: 2918500-2
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  • 8
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    Contemporary Distribution of High-Grade Prostate Cancer in the Circumstances of Opportunistic Testing
    Walter de Gruyter GmbH ; 2020
    In:  Serbian Journal of Experimental and Clinical Research Vol. 21, No. 4 ( 2020-12-01), p. 299-305
    Details
    In: Serbian Journal of Experimental and Clinical Research, Walter de Gruyter GmbH, Vol. 21, No. 4 ( 2020-12-01), p. 299-305
    Kurzfassung: Screening has dramatically changed the distribution of the mean age, stage and grade of prostate cancer (PCa) at diagnosis. However, regional-level data that characterize contemporary PCa patients are limited. The aim of the study was to ascertain main clinical and pathological characteristics of PCa at the present time in the circumstances of opportunistic testing. High-grade PCa according to age, serum prostate specific antigen (PSA), volume prostate, PSA density (PSAD), digital rectal examination (DRE) number of positive cores biopsies and the average percentage of cancer in biopsy at diagnosis has been retrospectively evaluated in 100 men with biopsyproven PCa, at Clinical Centre Kragujevac, from September 2016 until September 2017. PCa were stratified according to Gleason score (GS) into low/intermediate-grade (GS ≤ 7) and high-grade (GS ≥ 8). To identify the determinants associated with high-grade PCa, we performed univariate and multivariate logistic regression. The most prevalent PCa were the low/intermediate-grade (65%), followed by high-grade (35%). The mean age of the patients was 71.5 (range: 56–88) years and median PSA was 14.6 (range: 1.4–935) ng/ml. There were significant differences in age, PSA, PSAD, DRE, number of positive biopsy and average percentage of cancer in biopsy between patients with or without high-grade GS. Logistic analysis demonstrated the PSAD and age have strong prognostic value of high-grade PCa. In conclusion, our study has shown the worrying frequency of high-grade PCa in the circumstances of opportunistic testing. Older men and higher level of PSAD had a much higher probability of high-grade PCa.
    Materialart: Online-Ressource
    ISSN: 2335-075X , 1820-8665
    URL: Article
    DOI: 10.2478/sjecr-2018-0030
    Sprache: Englisch
    Verlag: Walter de Gruyter GmbH
    Publikationsdatum: 2020
    ZDB Id: 2710266-X
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  • 9
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    Assortment structure in beech coppice stands in the Crni vrh region
    National Library of Serbia ; 2003
    In:  Bulletin of the Faculty of Forestry Vol. , No. 87 ( 2003), p. 103-111
    Details
    In: Bulletin of the Faculty of Forestry, National Library of Serbia, Vol. , No. 87 ( 2003), p. 103-111
    Kurzfassung: U radu su prikazani rezultati istrazivanja sortimentne strukture u izdanackim sastojinama bukve na podrucju Crnog vrha. Sortimentna struktura ustanovljena je prema odredbama standarda (JUS) u dve ekoloske jedinice. Na osnovu rezultata izvrsenih analiza proizlazi da se vrednosna sortimentna struktura znacajno povecava sa povecanjem precnika stabla i da ne postoje statisticki znacajne razlike u sortimentnoj strukturi izmedju izdvojenih ekoloskih jedinica. Zavisnost vrednosne sortimentne strukture od precnika stabla moze se predstaviti stepenom funkcijom. Vrednosno ucesce sortimenata koji su izradjeni od deblovine prilikom teorijskog krojenja u zavisnosti od precnika stabla ima rastucu tendenciju, izuzev drveta za drvenu vunu.
    Materialart: Online-Ressource
    ISSN: 0353-4537 , 2217-8600
    URL: Article
    DOI: 10.2298/GSF0387103D
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2003
    ZDB Id: 2585444-6
    SSG: 23
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  • 10
    Online-Ressource
    Online-Ressource
    Structural, production and dynamic characteristics of the strict forest reserve “Racanska sljivovica“ on mt. Tara
    National Library of Serbia ; 2011
    In:  Bulletin of the Faculty of Forestry , No. 103 ( 2011), p. 93-114
    Details
    In: Bulletin of the Faculty of Forestry, National Library of Serbia, , No. 103 ( 2011), p. 93-114
    Kurzfassung: Mesovite sume liscara i cetinara zbog visoke proizvodnosti i izrazenog biodiverziteta predstavljaju najvredniji deo sumskog fonda Srbije. Cilj istrazivanja bio je da se analizom mesovitih suma jele, smrce i bukve prasumskog porekla u rezervatu ?Racanska Sljivovica? uoce zakonitosti koje bi potom imale primenu u gazdovanju sumama Tare. Osnov istrazivanja cine podaci sest periodicnih potpunih (totalnih) premera koji su podvrgnuti klasicnoj dendrometrijskoj i statistickoj obradi. Struktura suma bliska je tipicnoj prebirnoj strukturi. Dinamika urastanja (osim bukve) relativno je povoljna, sa odnosom prema odumrlim stablima od 1,72. Broj stabala i zapremina kontinuirano rastu, dostizu iznos 422,2 kom?ha-1, odnosno 800,3 m3?ha-1, a zapreminski prirast je i pored blagog pada visok - preko 12 m3?ha-1. Jela je nosilac prebirne strukture i proizvodnosti, nuzno je stimulisati opstanak i razvoj bukve na konkretnom stanistu, preispitati uravnotezeni broja stabala i zapreminu i istraziti vezu izmedju broja uraslih stabala i zapremine sastojine. PR Projekat Ministarstva nauke Republike Srbije, br. 37008: Sustainable management of total forest potentials in the Republic of Serbia
    Materialart: Online-Ressource
    ISSN: 0353-4537 , 2217-8600
    URL: Article
    DOI: 10.2298/GSF1103093P
    Sprache: Englisch
    Verlag: National Library of Serbia
    Publikationsdatum: 2011
    ZDB Id: 2585444-6
    SSG: 23
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