Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 19.
  1. Library Resource
    janvier, 1995
    Namibie, Afrique sub-saharienne

    Results from this study show that the over-used but under-researched association between grazing and land degradation in the Kalahari has been oversimplified. In typical Kalahari conditions, the ecological changes that have been brought about by grazing cannot be linked with more fundamental changes in ecosystem function. Basic soil processes appear relatively unaffected by grazing pressure outside the sacrifice zone, and there is no evidence to suggest that the resilience of the system has been affected through soil degradation.

  2. Library Resource
    janvier, 1995
    Israël, Asie occidentale, Afrique septentrionale

    Paper explores the relationships between the following concepts under the conditions of Middle Eastern semi-arid ecosystems. Paper states that there are two apparent contradictions in the title of this paper. First, grazing by domestic livestock is often considered to be hostile to nature conservation, especially in semi-arid areas (the ongoing conflict between ranchers and environmentalists in western USA is just one contemporary example of this).

  3. Library Resource
    janvier, 1995
    Belize, Amérique latine et Caraïbes

    Will intensifying the road network around market areas produce greater economic returns and less environmental damage than extending the road network into new areas?Rural roads promote economic development but also facilitate deforestation. To explore the trade-offs between development and environmental damage posed by road building, Chomitz and Gray develop and estimate a spatially explicit model of land use.

  4. Library Resource
    janvier, 1995
    Europe

    How do the spatial dynamics of the socialist city compare with those of the market city? What happens to a city when all investment decisions are made without land markets? What are the outcomes when the forces described by familiar urban models are not allowed to work?Bertaud and Renaud describe the structure of Russian cities after 70 years of Soviet development.

  5. Library Resource
    janvier, 1995

    Proposed here is a new scheme for allocating international river water that accounts for the stochastic nature of water supply and the dynamic nature of its demand. The suggested scheme is expected to improve the efficiency of river basins' water allocation and the riparians' welfare.International river and lake basins constitute about 47 percent of the world's continental land area, a proportion that increases to about 60 percent in Africa, Asia, and South America.

  6. Library Resource
    janvier, 1995
    Afrique du Sud, Afrique sub-saharienne

    Commercial farms in South Africa could become significantly more efficient if they became smaller. The government could encourage that trend by removing policies and distortions that favor large over small farms.Drawing on international evidence, van Zyl, Binswanger, and Thirtle discuss the sources of economies of scale.

  7. Library Resource
    janvier, 1995
    États-Unis d'Amérique, Amérique septentrionale

    A survey of the development of pensions in the United States, addressing such issues as what employees want from pensions, what incentives the employer has to create pensions, and what desirable effects industrial pensions have on the economy.Pensions are retirement insurance: They offer protection in case you live long enough to quit collecting a paycheck and can stop working. In the United States, pensions are provided by both public and private sectors.

  8. Library Resource
    janvier, 1995
    Zimbabwe, Afrique sub-saharienne

    This case study of Zimbabwe has examined developments in biotechnology against the background of a well-developed national agricultural research, plant breeding and seeds system. It has then assessed the constraints to biotechnology research, technology development and diffusion in the light of the resources available and the technology transfer mechanisms in place for different groups of farmers.

  9. Library Resource
    janvier, 1995
    Slovénie, Europe orientale, Europe

    At 3 to 4 percent a year, the displacement rate for the Slovenian labor force in 1990 93 was higher than that for the North American labor force during a major recession in the 1980s. But patterns of displacement were similar.Unusually rich administrative data sets covering both firms and workers enabled Orazem, Vodopivec, and Wu to study displacement in Slovenia during 1987 93.They describe displacement trends and the characteristics of displaced workers, comparing them to those in North America during a major recession.

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