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Wyświetlanie 1-3 z 3
Tytuł:
Ceny sprzedaży drewna w użytkowaniu przedrębnym w drzewostanach sosnowych w zależności od ich wieku
Prices of timber sales in the intermediate harvest in Scots pine stands depending on their age
Autorzy:
Mandziuk, A.
Parzych, S.
Powiązania:
https://bibliotekanauki.pl/articles/979471.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
drzewostany sosnowe
wiek drzewostanu
uzytkowanie przedrebne
surowce drzewne
drewno
sortymenty drewna
ceny sprzedazy
site class index
timber price
assortments
intermediate harvest
Opis:
The research concerned the implementation of tasks in the field of harvesting timber in 2008−2012 in pure pine stands aged 10−140. Numerical data from the SILP database were used for calculating the average price of timber in the intermediate harvest. The data on the volume harvested covered late cleaning, early thinning and late thinning. The assortment structure concerned the following groups of large− (WA0, WA1, WB0, WB1, WC0, WC1 and WD), medium− (S10, S11, S2A, S2B, S3A, S3B and S4) as well as small−sized (M1 and M2) assortment groups. The data on the size and value of wood assortments sold across the country concerned the year 2011 and were used to calculate the average price of wood in age subclasses according to the site quality described with site index class. Subsequently, for each site quality class polynomial equations of the trend line was determined and average timber price for each age subclass was calculated for small−, medium− and large−sized assortments. The analysis showed that S2 is the most frequently harvested assortment in the intermediate cuts in Scots pine stands, whose share depending on the site quality class is at the level of 65.7−72.7% of total harvest. The share of small−sized assortments decreases with age in all site quality classes. The opposite tendency is seen for large−sized assortments, whose share decreases with the deterioration of the site quality. Fraction of medium−sized assortments reaches its peak at the age of ca 45 in IA site index class and the shift in the peak with age is associated with the deterioration of the site quality. The higher the site quality, the higher the prices of assortments in the intermediate harvest. This trend occurs in all age subclasses.
Źródło:
Sylwan; 2019, 163, 11; 883-891
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rynek środków ochrony roślin w Polsce w latach 2005-2009
Market of plant protection products in Poland in 2005-2009
Autorzy:
Piwowar, A.
Powiązania:
https://bibliotekanauki.pl/articles/44059.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:
rynek srodkow ochrony roslin
srodki ochrony roslin
pestycydy
podaz
popyt
ceny
relacje cen
zuzycie srodkow ochrony roslin
struktura sprzedazy
herbicydy
fungicydy
zaprawy nasienne
Polska
lata 2005-2009
Opis:
Chemiczne środki ochrony roślin mają bardzo duże znacznie w powiększaniu efektywności produkcji rolnej. Celem artykułu było przedstawienie rynku środków ochrony roślin w Polsce w latach 2005-2009, z uwzględnieniem zmian w podaży, popycie oraz cenach pestycydów. W artykule przedstawiono także zmiany w liczbie podmiotów prowadzących obrót środkami ochrony roślin w badanych latach w Polsce.
Chemical pesticides have a very big significance in increasing the efficiency of agricultural production. The aim of this article was to present the market of plant protection products in Poland in 2005-2009, taking into account the changes in supply, demand and prices of pesticides. The article presents the changes in the number of entities engaged in trading of plant protection products in the studied years in Poland.
Źródło:
Journal of Agribusiness and Rural Development; 2012, 23, 1
1899-5241
Pojawia się w:
Journal of Agribusiness and Rural Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany cen, ilości i wartości surowca drzewnego sprzedawanego w Lasach Państwowych
Changes in prices, volume and value of wood raw material sold by the State Forests
Autorzy:
Wysocka-Fijorek, E.
Lachowicz, H.
Powiązania:
https://bibliotekanauki.pl/articles/985841.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
surowce drzewne
drewno
ceny
wartosc
dynamika cen
analiza sprzedazy
indeks Laspeyresa
indeks Fischera
indeks Paaschego
dynamics measures
laspeyres index
paasche index
fisher index
Opis:
The State Forests in Poland operate according to the principles of sustainable forest management combining and fulfilling diverse functions. Wood production is one of them. In this context, the question arises whether the species composition of forest stands has a greater impact on timber sales than the optimization of the assortment structure of harvested timber. The aim of the paper is to present the dynamics of prices, volume and value of timber sold by the State Forests and to examine the impact of the price and volume on the value of timber sales. The analysis of the dynamics measures was based on the data in the financial reports published annually on the websites of the State Forests as well as on the announcements of the Central Statistical Office in Poland on the average price of timber, calculated from the average price of timber sold by forest districts in the first three quarters of the year. The aggregate indices were calculated using the data on the volume, prices and value of the sold timber included in the State Forests Information System. The data were obtained by dividing wood assortments and species into groups. The analysis focused on years 2012−2014. It included seven tree species: pine, spruce, fir, oak, beech, alder and birch as well as the most common groups of wood assortments: WA, WB, WC, WD, WBCK, WCK, S1, S2, S4, M1 and M2, for which the weighted average price of timber and the amount of timber sold were calculated in individual years. Of the analysed characteristics (price, volume, value), the average rate of changes in timber prices was the lowest and amounted to 1.9% per year. The volume of timber offered on the market increased by 3.01% annually. The cumulative effect of the increase in the price and volume of timber offered for sale was 5.94% of the annual value of timber sold.
Źródło:
Sylwan; 2018, 162, 01; 12-21
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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