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Résultats de la recherche

Showing items 1 through 9 of 4.
  1. Library Resource
    janvier, 1990
    Botswana, Zimbabwe, Afrique sub-saharienne

    This document contains a collection of critical comments by experts working in the field of pastoralism with regard to several PDN papers.

  2. Library Resource
    janvier, 1990
    Zimbabwe, Afrique sub-saharienne

    In their recent paper, de Leeuw and Tothill (1990) discussed the shortcomings of estimating carrying capacity (CC) of pastoral systems in Africa. They noted the difficulty of determining available forage per animal due to high annual and spatial variability in plant production, seasonal changes in forage quantity and quality, livestock species mix, and the use of supplemental feeds.

  3. Library Resource
    janvier, 1990
    Botswana, Zimbabwe, Afrique sub-saharienne

    This article suggests that communual rangeland management policies in Botswana and Zimbabwe are based on incorrect technical assumptions about the stability of semiarid rangelands, the nature of rangeland degradation, and the benefits of destocking. Consequently, inappropriate policies, stressing the need to destock and stabilise the rangelands, are pursued.Acknowledgement of the great instability but intrinsic resilience of rangeland would encourage the Governments to more favourable regard the opportunistic stocking strategies of the agro-pastoralists of the Communual Areas.

  4. Library Resource
    janvier, 1990
    Afrique sub-saharienne

    Ever since colonial administrators and western trained scientists became involved in sub-Saharan Africa in the early 20th century and were faced with the task of governing countries where livestock production was a major economic enterprise, the proper utilisation of rangelands became a major concern. While during most of the colonial era devastating epidemics (like rinderpest and pleuropneumonia) kept the growth of livestock populations in check, during the 1950s and 1960s regional campaigns of eradicating these major cattle diseases created a continuous increase in livestock numbers.

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