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Mostrando ítems 1 a 9 de 17.
  1. Library Resource
    Informes e investigaciones
    Diciembre, 1989
    Kenya

    Local Authority
    The section of Githurai west of the highway falls under the
    jurisdiction of the Nairobi City Commission. The rest, which
    is east of the highway falls under the jurisdiction of the
    Kiambu County Council.
    Ownership and Acquisition
    Until 1967 the land belonged to a dairy farmer. His workers
    had set up a co~operative with the intention of buying off
    the farm from him. They formed a compa~y called Githurai
    Thinganga. The land they bought consisted of three plots,

  2. Library Resource
    Enero, 1989
    Zimbabwe, África subsahariana

    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
    Enero, 1990
    Botswana, Zimbabwe, África subsahariana

    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
    Enero, 1990
    Zimbabwe, África subsahariana

    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
    Enero, 1989
    Malí, África subsahariana

    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.

  6. Library Resource
    Enero, 1990
    Botswana, Zimbabwe, África subsahariana

    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.

  7. Library Resource
    Enero, 1989
    Estados Unidos de América, África subsahariana, América Septentrional, América Latina y el Caribe

    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.

  8. Library Resource
    Enero, 1990
    África subsahariana

    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.

  9. Library Resource
    Informes e investigaciones
    Diciembre, 1989
    Zimbabwe, África, África austral

    Throughout Africa the importance of land use issues in relation to tsetse control planning has been emphasized consistently in the tsetse literature. Because of inappropriate land use, concerns for the environment in tsetse-freed areas have been expressed frequently. This debate is very relevant to Zimbabwe, where extensive tsetse control operations in recent years have confined the remaining area of tsetse infestation to parts of the Zambezi valley, a semi-arid region of the country with a fragile eco-system and limited agricultural potential.

  10. Library Resource
    Artículos de revistas y libros
    Diciembre, 1989
    Etiopía, África, África oriental

    Investigates the effects of improved surface drainage on the productivity of Vertisols in a wheat-and-chickpea cropping trial conducted in 1987 at ILCA;s Debre Zeit research site in the Ethiopian highlands. Chickpea plots were subjected to four irrigation treatments, viz, no irrigation, irrigation at planting, 35 days and 70 days after planting. The trial showed that with a starter irrigation to aid the germination of a second crop, sequential cropping of two crops in the same growing season is feasible in the Debre Zeit.

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