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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 50.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Reviews procedures for obtaining reliable information on animal populations, other ecological features and land use generally from low-flying aircraft by direct observation or conventional photography, with reference to types of sampling unit, and the relative merits of unstratified systematic and stratified random sampling.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Evaluates the usefulness of direct data collection from low-flying light aircraft for inventory & monitoring animal population & other rangeland features, viz. water bodies, vegetation structure & greenness and human settlements, for planning and management purposes.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems are included. Disease control on a commercial scale is discussed. Formulae suggested for stake treatment before planting and storage and a key for identifying some cassava diseases are annexed. Color photos on symtomatology are included. (AS)

  4. Library Resource
    Informes e investigaciones
    Diciembre, 1981
    Botswana, África, África austral

    Records the history of ILCA's involvement in Botswana between 1977 & 1981, w. emphasis on the monitoring of the operational aspects of the Tribal Grazing Land Policy, particularly regarding the implementation of the Second Livestock Development Project, and the monitoring of range, livestock performance, ranch economics, socio-economic activities and the operations of the Nojane ranches; reviews other ILCA activities, particularly research collaboration w. scientists of the Animal Production Research Unit (APRU).

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Presents and discusses ILCA's research on smallholder farming in the highlands, village sheep and goat production in the humid zone, cattle production in the subhumid zone, pastoral production in the arid zones of West Africa, range livestock production in eastern and southern Africa, and breed evaluation and herd modelling.

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Presents and discusses ILCA's research on smallholder farming in the highlands, village sheep and goat production in the humid zone, cattle production in the subhumid zone, pastoral production in the arid zones of West Africa, range livestock production in eastern and southern Africa, and breed evaluation and herd modelling.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 1981

    Presents workshop papers & discussion summaries on the development of low-level aerial survey techniques and presents applications to livestock, wildlife and land-use surveys. Reviews survey designs and sampling procedures as well as problems of bias, levels, from ground survey to satellite imagery; along w. recommendations for further research and cooperation.

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