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Wyszukujesz frazę "assortment structure" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Metody określania struktury sortymentowej drzewostanów i ich wstępna ocena
    Autorzy:
    Bruchwald, A.
    Kłapeć, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022044.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    struktura sortymentowa
    drzewostany
    miazszosc drzewostanow
    lesnictwo
    struktura drzewostanu
    assortment structure
    volume measurement methods
    analysis of methods
    Opis:
    Assortment volume determination in the forest district can be carried out with three methods based on individual tree, whole stand, and management division. The paper presents detailed characteristic and opportunity of the practical use of these methods. The authors conclude that application of the particular method depends on assumed aim and required accuracy.
    Źródło:
    Sylwan; 2005, 149, 10; 3-10
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza porównawcza struktury sortymentowej drewna po stronie planu oraz jego wykonania na poziomie nadleśnictwa
    Comparative analysis of timber assortment structure in the logging plan and its realisation at the level of the forest district
    Autorzy:
    Bruchwald, A.
    Kłapeć, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018507.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    struktura sortymentowa
    nadlesnictwa
    plan pozyskiwania drewna
    drewno okragle
    lesnictwo
    szacunek brakarski
    pozyskiwanie drewna
    assortment structure
    database use
    logging plans
    Opis:
    Attempts to apply the proper method of grading estimations that would result in working out a good logging plan have been made for many years. Comparison of share of assortment groups in annual logging plan with its realisation usually shows significant differences. Presented research results from 3 forest districts prove the need of working out a new planning method that would widely utilise data on logging realisation which exist in computer databases of forest districts.
    Źródło:
    Sylwan; 2006, 150, 05; 24-29
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany struktury sortymentowej drzewostanów sosnowych I bonitacji w Nadleśnictwie Pisz
    Changes of assortment structure of Scots pine stands of Ist site index class in Pisz Forest District
    Autorzy:
    Lewandowska, M.
    Stępień, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/991719.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Nadlesnictwo Pisz
    drzewostany sosnowe
    drzewostany I bonitacji
    struktura sortymentowa
    wiek drzewostanu
    sortymenty drewna
    assortment structure
    aging process
    changes
    homologous series of stands
    Opis:
    In spite of the growing importance of the protective and social functions of forests, their productive function, including production of raw wood with a diversified assortment structure, is still prominent. Changes in the assortment structure depend to a large extent on tree species, habitat conditions and intensity of tending treatments. However, for the temporal organization of forest management, it is essential to recognize the dynamics of these changes in relation to stand age. The paper contains an analysis of quantitative and qualitative changes in the assortment structure of the Ist site index pine stands in the Wilcze Bagno Forest Compartment (Pisz Forest District), depending on the length of the primary production of standing timber. Data from 10 forest stands similar in terms of habitat, stand density and anagement treatments were taken for analysis. These stands form a homologous series ranging in age between 40 and 130 years.
    Źródło:
    Sylwan; 2013, 157, 06; 412-418
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prognoza struktury sortymentowej trzech pochodzeń buka
    Autorzy:
    Jednoralski, G.
    Tarasiuk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022223.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    sortymenty drewna
    buk zwyczajny
    proweniencje
    drewno okragle
    prognozowanie
    lesnictwo
    Fagus sylvatica
    drewno wielkowymiarowe
    drzewa lesne
    european beech
    large size wood
    prognose making
    geographical gradient
    assortment structure
    Opis:
    Poland has rather rigorous regulations concerning forest tree seed zones. The high commercial quality of the coastal (northern) and upland (southern) beech provenances has stipulated the need to verify their performance also in the central Poland as possible quality seed source. A trail consisting of three open pollinated half−sib provenances has been established in Forest Experimental Station in Rogów in the year 1963. After the stand had reached the age of 44 years, a prognosis has been made focused on assessing the final age assortment structure of particular trees. The results show that the local population is at present the poorest and it is expected to produce the lowest wood quality in the mature stand. It is concluded that, following the results of 44 years, both the upland beech and – first of all – the coastal beech are due to their excellent performance potentially valuable seed source for the central Poland.
    Źródło:
    Sylwan; 2005, 149, 04; 48-54
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sprzedaż drewna w nadleśnictwach Puszczy Białowieskiej w latach 2008-2015
    Sale of timber in forest districts of the Bialowieza Forest in 2008-2015
    Autorzy:
    Lachowicz, H.
    Zastocki, D.
    Sadowski, J.
    Moskalik, T.
    Nietupska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985928.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    gospodarka lesna
    nadlesnictwa
    Nadlesnictwo Bialowieza
    Nadlesnictwo Browsk
    Nadlesnictwo Hajnowka
    surowce drzewne
    drewno
    sortymenty drewna
    sprzedaz drewna
    bialowieża forest
    timber sales
    assortment and species structure
    Opis:
    The structure of timber sales in forest districts of the Białowieża Forest in the years 2008−2015 is presented. The Białowieża Forest is one of the most valuable natural areas in Europe. The data from the reports generated by the State Forests Information System of the Hajnówka, Browsk and Białowieża forest districts were used for the research. The information contained in the forest management plans and nature conservation programs of the surveyed forest districts was also used. The volume of the sold merchantable timber in the Białowieża Forest amounted to 669,072 m3, of which 63.43% was softwood and 36.57% hardwood. Among the softwood assortment, sales of the large−sized timber amounted to 44.42%, while of the medium−sized timber to 55.58%. For the large−sized hardwood, the share of sales amounted to 30.66%, while for the medium−sized hardwood to 69.34%. The small−sized timber was sold at 22,389 m3, with the share of hardwood assortments being 82%, and of softwood 18%. A small share in the sales of small−sized timber is caused by the lack of FSC certification by forest districts, which excludes large industrial companies that buy predominantly the medium−sized coniferous timber assortments. The average price obtained from the sale of timber in the the Białowieża Forest in the analysed period was 134.7 PLN/m3. At a price higher than the average, wood was sold in the Białowieża and Hajnówka forest districts, while in the Browsk Forest District the timber was sold at a price lower than the average. The total volume of merchantable timber harvested in the forest districts of the Białowieża Forest in the analysed years, including the small−sized timber, amounted to 686,684 m3, with 691,461 m3 of timber being sold. The volume of the merchantable timber sold at that time was 669,072 m3, which constituted only 0.24% of the total timber sold at the State Forests in Poland.
    Źródło:
    Sylwan; 2018, 162, 11; 949-954
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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