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.
Résultats de la recherche
Showing items 1 through 9 of 12.-
Library Resourcejanvier, 1995Namibie, Afrique sub-saharienne
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Library Resourcejanvier, 1995Israël, 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).
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Library Resourcejanvier, 1994Afrique sub-saharienne
This paper focuses on extracts from a recent comparative analysis of livestock and land use surveys across a range of agro-climatic conditions in sub-Saharan Africa, based on information from systematic low level aerial reconnaissance and complementary ground studies in Mali, Niger, Nigeria, Sudan and Tchad, between 1980 and 1993.
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Library Resourcejanvier, 1995Afrique 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.
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Library Resourcejanvier, 1995Afrique du Sud, Afrique sub-saharienne
Apparently factor prices do matter in agricultural production and in the selection of production technology. And in South Africa, more attention should be focused on the technological needs of small scale farmers.
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Library Resourcejanvier, 1995Zimbabwe, 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.
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Library Resourcejanvier, 1995Afrique sub-saharienne
In urban areas of Cote d'Ivoire, human capital is the endowment that best explains welfare changes over time. In rural areas, physical capital especially the amount of land and farm equipment owned matters most.Empirical investigations of poverty in developing countries tend to focus on the incidence of poverty at a particular point in time. If the incidence of poverty increases, however, there is no information about how many new poor have joined the existing poor and how many people have escaped poverty.Yet this distinction is of crucial policy importance.
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Library Resourcejanvier, 1994Afrique sub-saharienne
Review for sub-Saharan Africa, examines the English-language literature and focuses on four important dimensions of exclusion: (i) exclusion from agricultural land; (ii) exclusion from agricultural livelihood; (iii) exclusion from formal and informal employment; (iv) exclusion from organization and representation.Paper is organized in six sections. The first section discusses concepts of exclusion. The main body of the review examines the four dimensions of exclusion listed above.
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Library Resourcejanvier, 1995Afrique sub-saharienne
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Library Resourcejanvier, 1994Asie occidentale, Afrique septentrionale
The report focuses on: the statue of land degradation: types of degradation, their nature, severity and extent; the causes and consequences of land degradation; institutions to combat land degradation; proposals for strengthening efforts to combat land degradation. Countries covered are: Afghanistan; Bangladesh; India; Bhutan; Iran; Pakistan; Nepal; Sri Lanka.
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