Sökning: "sativa"

Visar resultat 1 - 5 av 39 uppsatser innehållade ordet sativa.

  1. 1. Effects of nitrogen quality and quantity on weed-crop competition : a greenhouse experiment with Avena sativa and Avena fatua

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Crop Production Ecology

    Författare :Lukas Hallberg; [2019]
    Nyckelord :weed-crop competition; resource pool diversity; soil microbes; weed community;

    Sammanfattning : The intensification of agricultural activities has provided unprecedented increases in crop production. In the light of this development concerns have been raised about its negative environmental impact. High-input farm management has further reduced the weed diversity and shaped weed communities to consist of a few highly competitive weed species. LÄS MER

  2. 2. Fields of Dreams: Scenarios to Produce Selected Biomass and Renewable Jet Fuels that Fulfill European Union Sustainability Criteria

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Torry van Slyke; [2019]
    Nyckelord :aviation biofuel; Camelina sativa; forestry residues; land use change; Renewable Energy Directive; sustainable development;

    Sammanfattning : Aviation greenhouse gas (GHG) emissions have risen faster than any other transport sector to double between 1990 and 2005. Such emissions from aviation could increase another 700 percent globally, and at least 150 percent in the European Union (EU), by 2050 due to continuously increasing consumer demand. LÄS MER

  3. 3. Examining the competitive abilities of cornflower (Centaurea cyanus) in a growth chamber experiment.

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Emil Karlsson; [2019]
    Nyckelord :Centaurea cyanus; Papaver rhoeas; Avena sativa; Cornflower; Growth chamber; Plant competition; Plant ecology; LAI; Root biomass; Root length; Biomass; Dry weight; Interspecific competition; Blåklint; Kärlväxter; Konkurrensförmåga; Ekologi;

    Sammanfattning : Competition between different species (interspecific competition) is an important factor to consider when estimating population trends, geographic distributions, and management options of species. Many historically common vascular plant species found in agricultural environments have been negatively affected by changes in community composition and in turn, changes in competition pressures. LÄS MER

  4. 4. Arter att öka användningen av i Malmös urbana miljöer : träd som klarar klimatförändringens utmaningar

    Kandidat-uppsats, SLU/Department of Landscape Architecture, Planning and Management (from 130101)

    Författare :Loui Thornberg; Anna Dahlin; [2019]
    Nyckelord :klimat; klimatförändringar; Malmö; stadsträd; urban; hårdgjord; artdiversitet; Liquidambar styraciflua ’Worplesdon’; Catalpa bignonioides; Platanus orientalis; Castanea sativa; Quercus coccinea;

    Sammanfattning : The amount of impervious areas in Malmö continue to increase as the city expands. These urban areas are already difficult for trees, with their heat and drought, and they will be even more difficult with climate change. Therefore, we must use tree species that can cope with these challenges. LÄS MER

  5. 5. The history of European hemp cultivation

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Mimmi Schroeder; [2019]
    Nyckelord :Cannabis sativa; hemp; cultivation; Europe; pollen; Earth and Environmental Sciences;

    Sammanfattning : Humans and hemp (Cannabis sativa) have an ancient relationship, dating back to the beginning of recorded history. Nevertheless, controversy surrounds the antiquity of the plant. LÄS MER