Essays about: "autumn and spring"

Showing result 1 - 5 of 160 essays containing the words autumn and spring.

  1. 1. Greenhouse gas emissions from peat soil thawing in spring : a comparison between fertilized and unfertilized soil

    University essay from SLU/Dept. of Soil and Environment

    Author : Fanny Otterlin Karlsson; [2024]
    Keywords : agricultural soil; carbon dioxide; freeze-thaw cycles; nitrous oxide; soil temperature; water content;

    Abstract : Peat soils drained for agriculture and forestry contribute to a significant amount of greenhouse gas emissions. Nitrous oxide is a greenhouse gas with high warming potential and agriculture in general accounts for about 70 % of nitrous oxide emissions. READ MORE

  3. 2. PERCEPTION OF URBAN TREES AND THEIR ECOSYSTEM SERVICES

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Author : Emma Dalros Sköld; [2023-08-03]
    Keywords : perceptions; tree preferences; urban trees; ecosystem services;

    Abstract : Global urbanization is one of the most wide-ranging, irreversible, and rapid land-use changes in modern history. Natural elements, such as trees, should be incorporated into cities to produce sustainable urban environments. READ MORE

  4. 3. Sustainable use of calcium nitrate fertilizer under variable precipitation, soil properties and crop management

    University essay from SLU/Dept. of Soil and Environment

    Author : Liliana Marcela Daza Gomez; [2023]
    Keywords : nitrogen.; calcium nitrate; ammonium-based fertilizers; urea; nitrate leaching; nitrous oxide emissions; crop yield;

    Abstract : Application of nitrogen fertilizers in agriculture contributes substantially to global greenhouse gas emissions and nitrogen leaching. Accordingly, there is a need to increase knowledge about sustainable farming practices to reduce nitrogen losses to the environment without curtailing crop harvest. READ MORE

  5. 4. Hur påverkas uppkomsten av renkavle (Alopecurus myosuroides Huds.) av olika bearbetningsstrategier under hösten? : How is the emergence of black-grass (Alopecurus myosuroides Huds.) influenced by different mechanical strategies during the autumn?

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Izabelle Strandqvist; Agust Persson; [2023]
    Keywords : Renkavle; black-grass; åtgärder mot renkavle; mekanisk ogräsbekämpning; fröbanksanalys; soil seed bank; fröbank;

    Abstract : Syftet med detta examensarbete var att undersöka hur uppkomsten av renkavle samt fröbanken påverkades av olika mekaniska jordbearbetningsmetoder under hösten. I den experimentella delen av examensarbetet utvärderades ett redan befintligt försök som genomfördes under hösten 2022 med olika bearbetningsmetoder för att bekämpa renkavle. READ MORE

  6. 5. Mercury accumulation in lake sediments on different time scales – the influence of algal primary production

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Anne Rebotzke; [2023]
    Keywords : mercury; lake sediment; primary productivity; algal scavenging; biogenic silica; diatom proxy; chlorophyll-a; organic matter;

    Abstract : The aim of this work is to test the proposed approach of algal scavenging as a driver of sediment mercury (Hg) on different time scales and to gain a better understanding of the mechanisms of Hg accumulation in lake sediments. A 3000-year sediment record from Nylandssjön in northern Sweden was analysed for this purpose, as well as a 20-year sediment record from the seasonal sediment traps of this lake. READ MORE