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Showing items 1 through 9 of 3.
  1. Library Resource
    Journal Articles & Books
    December, 1984
    France, Greece, China, Europe, Asia

    Freezaillah B.C. Yeom, de Malaisie, fait appel son exprience de gestionnaire forestier en Asie du Sud-Est pour valuer les informations disponibles sur les essences secondaires et peser le pour et le contre de leur emploi plus large dans le cadre gnral de l'amnagement des ressources. James S. Bethel, des Etats-Unis, qui a une vaste exprience de la sylviculture tant dans son pays que sur le plan international, expose ses propres observations et conclusions, ainsi que celles d'autres experts de renom, relatives la mise en valeur des ressources forestires.

  2. Library Resource
    Journal Articles & Books
    December, 1984
    Kenya, France, Nigeria, Philippines, Micronesia, Australia, Ghana, Congo, Guinea, India, Sierra Leone, Ethiopia, Niger, Brazil

    Shifting cultivation, under its diverse forms of slash and burn system, is a traditional method of cultivating tropical upland soils, mostly for subsistence purposes. This traditional system of cultivation is in ecological balance with the environment and does not irreversibly degrade the soil resource, provided a sufficient length of fallow is allowed for soil restoration. However, increasing population pressures necessitate more intensive use of land. The consequence is extended cropping periods and shortened fallows.

  3. Library Resource
    Journal Articles & Books
    December, 1984
    France, Greece, United States of America, Malaysia, Bulgaria, China, Italy, Europe, Asia

    Freezaillah B.C. Yeom of Malaysia, drawing upon his experience as a forest-resources manager in Southeast Asia, evaluates available information and weighs both positive and negative aspects of the development of lesser-known species within the wider context of resource-management efforts. From the United States, James S. Bethel, with extensive practical forestry experience at both national and international levels, evaluates, from the standpoint of the user, the facts and the conclusions that he and other well-known experts in the field of forest-resource development have drawn from them.

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