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Showing items 1 through 9 of 16.
  1. Library Resource
    Rapports et recherches
    décembre, 1989
  2. Library Resource
    janvier, 1989
    Zimbabwe, Afrique sub-saharienne

    Carrying capacity (CC) is a term often talked about in relation to livestock in the communal areas (CAs). It is the source of much confusion. This discussion paper will hopefully clarify some of the issues and make the implications for the policy debate clearer. It is based on the preliminary findings of field work carried out in Zvisharane District during 1986 and 1987.

  3. 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.

  4. 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.

  5. Library Resource
    janvier, 1989
    Maroc, Afrique septentrionale, Asie occidentale

    In Morocco's Western High Atlas Mountains, Berber agropastoralists are oblivious to the ideological debate over land tenure occurring in the rangeland development community. Berber producers of sheep and goats use a continuum of tenure institutions, from private ownership, to communal control, to uncontrolled, open range. Far from being ideological opposites, these different types of land tenure are complementary tools.

  6. Library Resource
    janvier, 1989
    Mali, Afrique sub-saharienne

    This article begins with an investigation into woodland management in Mali and moves onto a discussion of some of the fundamental practical problems associated with a major part of forest policy in Mali.

  7. 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.

  8. Library Resource
    janvier, 1989
    États-Unis d'Amérique, Afrique sub-saharienne, Amérique septentrionale, Amérique latine et Caraïbes

    It is clear from the failure of our efforts in many countries to halt the desertification process - deserts are now advancing at a rate of nearly 15,000,000 acres a year worldwide (Worrall 1984) (that something was missing in our knowledge of the problem). Four discoveries have been made that enabled us to design a simple holistic model to manage resources successfully in a sustained and economic manner.

  9. 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.

  10. Library Resource
    Articles et Livres
    décembre, 1989

    Summarises past and present experiences with livestock performance testing in sub-Saharan Africa and outlines the role of networks in improving on-farm testing through the use of standardised testing methods and rapid data handling and feedback. Includes data on the distribution of cattle and sheep populations by ecological zone in sub-Saharan Africa. Presents current programmes for on-farm and on-station performance recording.

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