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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 56.
  1. Library Resource
    Publicación revisada por pares
    Artículos de revistas y libros
    Diciembre, 2000
    Asia, África
  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2014
    Brunei Darussalam

    Conventional soil survey information is often unclear except to specialists. An approach using soil toposequences and a soil identification key was used to aid the translation of soil survey information into a form suitable for a nonspecialist audience with a case study from Brunei. Soil Taxonomy was used to characterize the major soil types; however, to assist end users, a complementary special‐purpose soil classification system was developed in the form of a soil identification key using plain language terms in English that were also translated into Malay.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 2011
    Grecia

    The diversity and abundance of wild bees ensures the delivery of pollination services and the maintenance of ecosystem diversity. As previous studies carried out in Central Europe and the US have shown, bee diversity and abundance is influenced by the structure and the composition of the surrounding landscape. Comparable studies have so far not been carried out in the Mediterranean region. The present study examines the influence of Mediterranean landscape context on the diversity and abundance of wild bees. To do this, we sampled bees in 13 sites in olive groves on Lesvos Island, Greece.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 2014
    Grecia

    Rapid urbanization together with policy ineffectiveness in controlling urban growth is often associated to soil and land degradation in both the developing and developed world. The present study analyses the relationship between urban expansion and soil degradation in an arid Mediterranean region (Attica, Greece) where the compact settlement pattern has been replaced by low‐density urban development. The study area is one of the most densely populated areas in the Mediterranean basin that has experienced an impressive growth in population during the last 60� yr.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 2001

    Do improvements in agricultural technology protect or endanger tropical forests? This book examines this controversial issue. It includes both theoretical frameworks for analysing the issue as well as case studies covering a wide range of geographical regions, technologies, market conditions and types of agricultural procedures. The authors identify technologies, contexts and policies that are likely to be beneficial to both farmers and forests.

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 2001

    This chapter summarises the key insights from the case studies included in the book. First, it discusses the technology-deforestation link in six different types of cases: developed countries, commodity booms, shifting cultivation, permanent upland (rainfed) agriculture, irrigated (lowland) agriculture, and cattle production. Next, it returns to the hypotheses presented in the book, and discusses the key conditioning factors in the technology-deforestation link. A number of factors determine the outcome.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 2007

    At independence in 1960, Africa was a modest food exporter while Asia was engulfed in a food crisis. The Green Revolution boosted food production in Asia and the global food problem shifted to Africa. However, science and technology have been promoted on an ad hoc basis in Africa's 45 years of independence. This chapter analyses why the Asian Green Revolution failed to take root in Africa, and why the average African grain yield has been flat since 1960.

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 2001
    Ecuador

    What policy lessons derive from the half-century of banana expansion in the coastal region? For that whole period bananas had a catalytic role in promoting coastal deforestation. At first, this was mostly through direct banana frontier expansion. Later the gradual settlement effects proved key. Modest credit subsidies, the large-scale construction and improvement of roads and ports, and a devalued exchange rate were probably the most important policies that contributed to the expansion of banana production, though they varied in importance during the different periods.

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