Sökning: "Agroforestry"

Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet Agroforestry.

  1. 1. The Knowledge Arena : Approaching agroforestry and competing knowledge systems - a challenge for agricultural extension

    Författare :Per Hillbur; Institutionen för kulturgeografi och ekonomisk geografi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Tanzania; coevolution; arena perspective; agroforestry; natural resource management; agricultural extension; knowledge systems; Social geography; Socialgeografi;

    Sammanfattning : Agriculture in many African countries is characterised by large diversity in production and great variation in growing conditions, irrigation potential and access to markets. This variation has proved to be a difficult matter when adjusting national agricultural policies and development projects to local conditions. LÄS MER

  3. 2. The relationship between climate, disease and coffee yield: optimizing management for smallholder farmers

    Författare :Biruk Ayalew Nurihun; Ayco J. M. Tack; Kristoffer Hylander; Ivette Perfecto; Stockholms universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Agroforestry; Arabica coffee; climate change; fungal disease; host-hyperparasite interaction; insect pest; minimum temperature and maximum temperature; shade cover; shade tree species; smallholder farmers; yield; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : Climate change and diseases are threatening global crop production. Agroforestry systems, which are characterized by complex multispecies interactions, are considered to provide nature-based solutions for climate change mitigation and pest and disease regulation. LÄS MER

  4. 3. Rural Livelihood Options for "a better and more sustainable future". Local perspectives from Myanmar and Morocco

    Författare :Laura Kmoch; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Rural Livelihoods; Cluster Analysis; Technology Adoption; Swidden Farming; Agroforestry; Climate Adaptation; Remittances; Local Agroecological Knowledge;

    Sammanfattning : In 2015, state leaders adopted the 2030 Agenda for Sustainable Development, to address global inequalities and respond to heightened concern about challenges, arising from contemporary global change. This thesis contributes to addressing these challenges, by extending the knowledge base that rural development stakeholders can draw on to co-construct viable livelihood options for vulnerable rural people. LÄS MER

  5. 4. Analysis and speciation of organic phosphorus in environmental matrices : Development of methods to improve 31P NMR analysis

    Författare :Johan Vestergren; Gröbner Gerhard; Jurgen Schleucher; Ulrik Ilstedt; Per Persson; Reiner Giesler; Benjamin L. Turner; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phosphorus; soil; 31P NMR; NaOH EDTA; terrestrial; sulfide; speciation; bioavailability; paramagnetic; humus; boreal; tropical; multi-dimensional; agroforestry; chronosequence; fysikalisk kemi; Physical Chemistry;

    Sammanfattning : Phosphorus (P) is an essential element for life on our planet. It is central in numerous biochemical processes in terrestrial and aqueous ecosystems including food production; and it is the primary growth-limiting nutrient in some of the world’s biomes. LÄS MER

  7. 5. The impact of forest on pest damage, pollinators and pollination services in an Ethiopian agricultural landscape

    Författare :Ulrika Samnegård; Kristoffer Hylander; Peter Hambäck; Sileshi Nemomissa; Jaboury Ghazoul; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; agroforestry; Apoidea; Coffea arabica; crop pests; Ethiopia; forest cover; landscape ecology; moist afromontane forests; pollination; species composition; tropical agriculture; Plant Ecology; växtekologi;

    Sammanfattning : The distribution of wild biodiversity in agroecosystems affect crop performance and yield in various ways. In this thesis I have studied the impact of wild biodiversity, in terms of trees and forest structures, on crop pests, pollinators and the pollination services provided in a heterogeneous landscape in southwestern Ethiopia. LÄS MER