Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 68.
  1. Library Resource
    Articles et Livres
    décembre, 2003
    Éthiopie, Afrique, Afrique orientale

    Inadequate feed and nutrition are major constraints to livestock production in sub-Saharan Africa. National and international research agencies, including the International Livestock Research Institute (ILRI), have developed several feed production and utilisation technologies. However, adoption of these technologies has so far been low. Identification of the major socio-economic and policy factors influencing the adoption of improved feed technologies is required to help design policy and institutional interventions to improve adoption.

  2. Library Resource
    Ressources et Outils d'entraînement
    décembre, 2003
  3. Library Resource
    Documents et rapports de conférence
    décembre, 2003
    Afrique australe, Afrique

    The objectives of the conference were threefold. First, to determine the need for a regional approach to EA in southern Africa. Second, to determine the best way of accounting for trans-boundary and cumulative impacts in the region.

  4. Library Resource
    Articles et Livres
    décembre, 2003

    The rating of biodiversity in arid and semiarid regions on the basis of ecological function and genetic traits of adaptation to severe environmental stresses produces significantly higher values, than that based solely on the commonly applied structural criteria of forms of life and levels of organization.

  5. Library Resource
    Articles et Livres
    décembre, 2003
    Australie

    In a naturally heterogeneous landscape in arid central Australia, a previous study found that grazing changed the distribution of water and nutrients amongst different geomorphic strata of the landscape. In this concurrent study, we show that herbage biomass, cover and composition responded primarily to these geomorphic strata and not to grazing. The cover of palatable species as a group proved the exception, and decreased with increasing grazing. The quantity of shrubs responded to both strata and grazing, and was greatest under least grazing.

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