Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 119.
  1. 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.

  2. 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.

  3. 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.

  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.

  5. Library Resource
    Manuels et directives
    mars, 1989
    Guatemala

    Establece todo lo relativo a plazos, funciones del Organismo Judicial y a los Mandatos y Mandatarios Esta Ley regula las normas generales de aplicación, interpretación e integración del ordenamiento jurídico guatemalteco.

  6. 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.

  7. Library Resource
    Rapports et recherches
    décembre, 1989
    Zimbabwe, Afrique, Afrique australe

    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.

  8. Library Resource
    Documents et rapports de conférence
    décembre, 1989
    Éthiopie, Afrique, Afrique orientale

    Reviews the extent and use of crop residues as livestock feeds in Ethiopia with special emphasis to wheat with respect to varietal difference and agronomic practices to enhance the utilisation of the straw. Lists area and yield of major crops in Ethiopia. Presents data on yield & chemical composition of various crop residues, weight gains of steers fed crop residue, and effect of N fertilization on grain yield and quality & quantity of wheat straw. Also summarises results of an undersowing trials of forage crops to wheat.

  9. Library Resource
    Articles et Livres
    décembre, 1989
    Éthiopie, Afrique, Afrique orientale

    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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