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Showing items 1 through 9 of 7.
  1. Library Resource
    Journal Articles & Books
    December, 1998
    Liberia, Benin, Ghana, Sierra Leone, Eswatini, Africa

    La plupart des numros d'Unasylva sont axs sur un thme particulier. L'objectif n'est pas de prsenter une introduction ou un manuel sur le sujet choisi (ce qui serait impossible tant donn le format de la revue), mais plutt de proposer une srie d'analyses sur des aspects spcifiques qui contribuent veiller l'intrt et l'attention du lecteur. Les articles sont dits de faon intresser les lecteurs dont le travail porte essentiellement sur le thme choisi, ainsi que la majorit des lecteurs qui travaillent dans d'autres disciplines.

  2. Library Resource
    Journal Articles & Books
    December, 1998
    Liberia, Benin, Ghana, Sierra Leone, Eswatini, Italy, Africa

    Most issues of Unasylva focus on a specific theme. The objective of this thematic orientation is to examine in depth a given aspect of forest and forestry development in order to highlight its significance and importance within our wider universe. The aim is not to serve as a primer or textbook on the chosen subject (this clearly would he impossible given the limited size of the journal) but rather to present a series of analyses on specific aspects that help to spark interest and awareness.

  3. Library Resource
    Reports & Research
    December, 2005
    Fiji, Tunisia, Malaysia, Mali, Oman, Italy, Ghana, Iran, Guinea, Ethiopia, Namibia, Solomon Islands, Netherlands

    Globally, according to FRA 2000, planted forests accounted for only 5% of forest area, but up to 35% of industrial roundwood supply. This is anticipated to rise to 40-44% by 2020. Planted forests reflect a higher social, environmental and economic importance than their area would suggest. Many countries have existing planted forest data that is not based upon forest inventory, is incomplete and often outdated. Thus it is difficult to measure and plan the quantity and quality of planted forest resources and the provision of goods and services that they supply.

  4. Library Resource
    Journal Articles & Books
    December, 1998
    Liberia, Benin, Ghana, Sierra Leone, Eswatini, Africa

    La mayor parte de los nmeros de Unasylva se centran en un tema concreto. El objetivo de esa orientacin temtica es examinar de forma pormenorizada un aspecto determinado de las actividades y el desarrollo forestales, con el fin de resaltar su significado e importancia dentro de los confines ms amplios de nuestro universo. Sin pretender que los diferentes nmeros sean como un manual de una materia concreta, se propone presentar una serie de anlisis de cuestiones especficas que contribuyan a suscitar inters y a concienciar al lector.

  5. Library Resource
    Policy Papers & Briefs
    September, 2016
    Seychelles, Rwanda, Burkina Faso, Malawi, Somalia, Madagascar, Central African Republic, Eswatini, Ghana, Djibouti, Sierra Leone, Ethiopia, Eritrea, Africa
  6. 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.

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