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Visar resultat 1 - 5 av 25 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Concepts for mechanized tree planting in southern Sweden

    Författare :Back Tomas Ersson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The underlying reason for mechanizing tree planting in southern Sweden is the biologically good planting results produced by today's tree planting machines. Nevertheless, the productivity of these tracked excavators with crane-mounted tree planting devices is too low for them to compete economically with manual planting. LÄS MER

  3. 2. Judar i det svenska folkhemmet. Minne och identitet i Judisk krönika 1948-1958

    Författare :Karin Sjögren; Centrum för teologi och religionsvetenskap; []
    Nyckelord :HUMANIORA; HUMANITIES; Freedom of religion act; Jewish National Fund; Blue-Box; historiography; identity; social memory; democracy; Wizo; Commemoration Day of Israel; New Years Day of the trees; Jewish New Year; Jewish holidays; tree planting; Judaism; Zionism; Israel; Judisk krönika; Sweden; education; the people s home ; Jewish holidays.; Non-Christian religions; Världsreligioner ej kristendom ;

    Sammanfattning : The thesis deals with the queswtion of which historic events have been emphasised amog Jewish people in Sweden after the Second World War. The founding of Israel is the point of departure and the termins ad quem is ten years further. LÄS MER

  4. 3. Game of crops : genetic composition and adaptation of seed orchard crops

    Författare :Alisa Heuchel; Xiao-Ru Wang; David Hall; Ulfstand Wennström; Jaroslaw Burczyk; Umeå universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; seed orchards; GBS; linear deployment; tree improvement; genetic diversity; adapation; topgrafting; Scots pine; Norway spruce; improved reforestation material; field performance; flowering stimulation; fertility variation; Genetics; genetik; environmental science; miljövetenskap;

    Sammanfattning : Orchard populations are artificial and intensively managed populations of elite, best-performing trees that are established for mass production of genetically improved seeds. Seed orchards connect cycles of selection, breeding, and testing of plus-trees with the deployment of the improved seeds at the operational plantations. LÄS MER

  5. 4. Reproductive Biology and Population Genetics of Common Ash (Fraxinus excelsior L.)

    Författare :Grazyna Bochenek; Göteborgs universitet; []
    Nyckelord :Fraxinus excelsior; delayed fertilization; functional dioecy; gender-related grow difference; inbreeding; tree-rings; non random mating; wind-pollination;

    Sammanfattning : Common Ash, Fraxinus excelsior L. (Oleaceae) is a wind-pollinated, wind-dispersed, deciduous tree, commonly occurring throughout Central and Northern Europe. The thesis addresses several questions concerning reproductive biology and factors influencing the genetic richness of ash stands. LÄS MER

  7. 5. Ömse sidor om vägen : Allén och landskapet i Skåne 1700-1900

    Författare :Patrik Olsson; Institutionen för kulturgeografi och ekonomisk geografi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Avenue; tree-lined road; landscape; aesthetics; historical geography; Scania.;

    Sammanfattning : This thesis is about avenues (tree-lined roads – in Swedish alléer). Avenues are a characteristic landscape element in many parts of Scania. This is an object created by man with a clear visual effect in the landscape. The avenue is also something which is both nature and culture, a man-made object from nature. LÄS MER