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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 6.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 1985
    Kenya, Italia, México, Brasil, Madagascar

    This issue of Unasylva focuses on the fortieth anniversary of FAO - -and, in particular, on 40 years of work by FAO's Forestry Department. Here, and in the two issues that follow, we will, in addition to publishing articles on important forestry topics, be reprinting selected excerpts from early issues of Unasylva. This issue, for example, includes the major portion of an article from the very first Unasylva: "The disappearance of the tropical forests of Africa,'' by Andr Marie A.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 1985
    Senegal, Chile, Perú, Italia

    The lead article on forestry and food security describes the importance of forestry In the maintenance, improvement or rehabilitation of the productive capacity of agriculture. Following is an article dealing with the threat of acid rain. Finally, it must be kept in mind that the best guardians of forest resources are the people who are the first to benefit from them. Therefore, the efforts of non-governmental organizations should be directed toward helping to increase people's participation in all aspects of forest management. The third article deals with this topic.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 1985
    Tanzania, África, África austral

    Evaluates the productivity of grade Boran cattle maintained by chemoprophylaxis under severe trypanosomiasis risk at Mkwaja ranch, Tanzania; uses data based on more than 20,000 calving records over the 10-year period from 1973 to 1982; discusses environmental influences on performance traits and links between tsetse population dynamics & cattle; includes comparison of Boran genotypes and its effect on pre-weaning growth characters.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 1985
    África, África oriental

    Examines the productivity of East African pastoral systems in terms of animal protein & energy production, milk offtake and livestock production parameters such as calving percentage, calf mortality and herd structure; compares the productivity of East African pastoral systems to those of commercial ranches and to pastoral systems in other parts of the world.

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