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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Host selection and antifeedants in Hylobius abietis pine weevils /

Månsson, Per E, January 2005 (has links) (PDF)
Diss. (sammanfattning). Uppsala : Sveriges lantbruksuniversitet, 2005. / Härtill 4 uppsatser.
2

Avsättning av sågbara sortiment kopplat till skötsel av svensk sykomorlönn och lind / The connection between sales opportunities of timber and silviculture of Swedish sycamore maple and linden

Nordkvist, Robin, Karlborg, Björn January 2021 (has links)
Marknaden för sågbara sortiment från svenskt lövvirke har haft svårt att fungera på ett tillfredställande sätt, tydligast är problematiken kring de mer udda trädslagen. Råvaran finns i de svenska skogarna och avsättning för råvaran finns i industrin men flödet från skog till industri har tydliga brister. Lösningen har blivit att industrin importerar stor andel av sin lövråvara vilket missgynnar avsättningen av den inhemska råvaran.Studiens främsta syfte var att undersöka avsättningsmöjligheterna för svensk sykomorlönn och lind kopplat till en nulägesbeskrivning av ett tidigare anlagt lövträdsförsök. Resultatet visade att avsättningsmöjligheterna varierade över tid men vid studien var efterfrågan på sykomorlönn svag medan den på lind var stark. Tidpunkten för slutavverkning av de aktuella trädslagen bör således väljas efter när prisbilden är hög.Studien visade att skötseln av de undersökta trädslagen är mycket viktig för att optimera kvaliteten och avsättningsmöjligheterna. De viktigaste parametrarna för god kvalitet var kvist och stamdimension. En större leveransbar volym vid den enskilda avverkningen ökade också avsättningsmöjligheterna. Nyckelord: Acer pseudoplatanus, Tilia cordata, Marknad, Avsättning, Skogsskötsel Keywords: Acer pseudoplatanus, Tilia cordata, Market, Removal, Forest management
3

Spatial variation of photosynthetic capacity of early-, mid-, or late-successional broad-leaved tree species in a temperate mixed forest

Legner, Nicole 23 March 2012 (has links)
No description available.
4

Accelerated Pot-in-Pot using Double Cropped Retractable Roof Greenhouse Grown Tree Liners

Rivera, Dania 17 December 2010 (has links)
No description available.
5

Reproduktion einer entomophilen Baumart in geringer Populationsdichte / - Das Beispiel der Winterlinde (Tilia cordata Mill.) / Reproduction of an entomophilous tree species in low density / - Small-leaved linden (Tilia cordata Mill.) as an example

Fromm, Martin 20 July 2001 (has links)
No description available.
6

Hydraulic traits and their relevance for water use strategies in five broad-leaved tree species of a temperate mixed forest

Köcher, Paul 21 November 2012 (has links)
No description available.
7

Effects of tree species composition on fine root biomass and dynamics in the rhizosphere of deciduous tree stands in the Hainich National Park (Thuringia) / Effects of tree species composition on fine root biomass and dynamics in the rhizosphere of deciduous tree stands in the Hainich National Park (Thuringia)

Jacob, Andreas 21 November 2012 (has links)
No description available.
8

MAŽALAPĖ LIEPA (Tilia cordata Mill.) LIETUVOJE: FENOTIPINĖ ĮVAIROVĖ IR MODALINIŲ MEDYNŲ NAŠUMAS / SMALL-LEAVED LIME (Tilia cordata Mill.) IN LITHUANIA: PHENOTYPICAL DIVERSITY AND PRODUCTIVITY OF MODAL STANDS

Semaškienė, Loreta 07 June 2006 (has links)
This doctoral dissertation has been accomplished during the period of 1995-2006 in the Department of Forestry at the Lithuanian University of Agriculture. In Lithuanian forests only one species of genus - small-leaved lime (Tilia cordata Mill.) – is natural. Study aim was to determine the distribution of lime stands in Lithuania, estimate their productivity and phenotypic variation. For the first time distribution of lime stands in different natural forest regions of Lithuania has been analysed. For the first time studies of the phenotypical diversity were conducted, phenotypical diversity in natural stands has been analysed. Phenological forms of small-leaved lime were singled out, their development differences were justified. Yield models for all lime stand sites and site productivity scale for lime stands were designed.For the first time data on the diversity of phenotypical traits and on the influence of environmental factors on phenotypical indices of lime trees were analysed in Lithuanian stands of natural origin. The data may be applied to estimate the possibilities of lime growth in different conditions, forecasting stand productivity. The data on phenotypic diversity may be important to preserve genetic diversity of naturally growing lime stands. For the first time the distribution of lime stands, their species composition in natural forest regions of Lithuania and in different sites were analysed. Yield models of modal stands and site productivity scales for lime... [to full text]
9

Walddynamik in Mischwäldern des Nationalparks Hainich / Forest Dynamics and Species Interaction in a mixed broad-leaved Forest in the Nationalpark Hainich (Thuringia)

Frech, Annika 03 May 2006 (has links)
No description available.
10

Impact of climate change-induced drought on tree root hydraulic properties and competition belowground / Einfluss von Bodentrockenheit auf die hydraulischen Eigenschaften und das Konkurrenzverhalten von Baumwurzeln

Rewald, Boris 30 April 2008 (has links)
No description available.

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