Sökning: "Livestock"

Visar resultat 36 - 40 av 110 avhandlingar innehållade ordet Livestock.

  1. 36. Sulfur cycling in Swedish arable soils : a chemical perspective

    Författare :Kristin Boye; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Sulfur (S) is an essential plant nutrient. Decreased S deposition in combination with a switch to high-analysis N/P-fertilizers has increased the need for S fertilization. Thus, soil research directed at understanding soil sulfur properties and processes has intensified. LÄS MER

  3. 37. Livelihood diversification and land use change in the Sahel: an interdisciplinary analysis of gum arabic in Sudan

    Författare :Bodil Elmqvist; LUCSUS; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sudan; Remote sensing; Livelihood; diversification; land use change;

    Sammanfattning : This thesis contributes to the ongoing debate about livelihood diversifi cation and the related question of agriculture’s central role in rural development in the Sahel. It focuses on on-farm diversifi cation during the dry season. The aim is to assess the practice and potential of gum arabic production for smallholders in central Sudan. LÄS MER

  4. 38. Seed mobility and connectivity in changing rural landscapes

    Författare :Alistair G. Auffret; Sara Cousins; Robin Pakeman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Biodiversity; Conservation; Functional connectivity; Historical ecology; Human-mediated dispersal; Invasive species; Landscape Ecology; Long-distance dispersal; Restoration; Seed bank; Seed dispersal; Seed rain; Structural connectivity; Physical Geography; naturgeografi;

    Sammanfattning : The success or failure of many organisms to respond to the challenges of habitat destruction and a warming climate lies in the ability of plant species to disperse between isolated habitats or to migrate to new ranges. European semi-natural grasslands represent one of the world's most species-rich habitats at small scales, but agricultural intensification during the 20th century has meant that many plant species are left only on small fragments of former habitat. LÄS MER

  5. 39. Fire and grazing in subalpine heathlands and forests of Bale Mountains, Ethiopia : fire ecology and traditional use of fire

    Författare :Maria Johansson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Pastoralists frequently depend on fire to produce forage for their livestock, but traditional burning is often banned, despite being essential for livelihoods and ecosystem maintenance. In the subalpine heathlands of Bale Mountains traditional fire management is still practiced. LÄS MER

  7. 40. Land degradation and mitigation in northern China. Evaluated from the biological production

    Författare :Micael Runnström; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; marklära; geomorfologi; Fysisk geografi; climatology; kartografi; klimatologi; cartography; pedology; desertification; China; GPP; Mu Us; LUE-model; overgrazing; Physical geography; geomorphology;

    Sammanfattning : Land degradation is commonly perceived to be severe in many parts of semi arid China. The transition towards market economy since the 1978 reforms, have set marginal dry lands under added pressure in the form of increased livestock numbers and expanding cultivation on erosive soils. LÄS MER