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Showing items 1 through 9 of 93.
  1. Library Resource
    Journal Articles & Books
    December, 2015
    South Africa, Southern Africa

    BACKGROUND AND AIMS: The Karoo biomes of South Africa are major feed resources for livestock farming, yet soil nutrient depletion and degradation is a major problem. The objective of this study was to assess impacts of long-term (>75 years) grazing during spring (SPG), summer (SUG), winter (WG) and exclosure (non-grazed control) treatments on soil nutrients, penetration resistance and infiltration tests.

  2. Library Resource
    Journal Articles & Books
    December, 2013
    Botswana

    Despite their importance to rural livelihoods, the economic and environmental sustainability of contemporary communal pastoral systems of the Kalahari is increasingly being put under scrutiny. Using data collected from a survey of randomly selected pastoral households from two districts of Ghanzi and Kgalagadi South, Botswana, this paper outlines the major constraints affecting contemporary extensive pastoral systems. Because of the prevailing semi-arid climate, recurrent drought outbreaks were cited as a common challenge in both study areas together with lack of fenced grazing areas.

  3. Library Resource
    Journal Articles & Books
    December, 2015
    Uganda

    Important signs of agricultural land quality deterioration are apparent in many countries, including declining yields and a switch to crops that demand fewer nutrients. This is despite efforts to curb land degradation rates through the years, including the attempt to promote use of soil and water conservation (SWC) technologies. This study was done in Kabale district in the South Western highlands of Uganda. Data analysis was done using cross-sectional data from 338 households.

  4. Library Resource
    Journal Articles & Books
    December, 2014
    Nigeria, Africa

    Lake Chad in Africa experienced severe droughts in the 1970s and 1980s and overexploitations of water resulting in a decline of water level in the Lake and surrounding rivers. Such droughts and overexploitation of water caused a significant change of land use and water management practices over the last 50� years. Understanding the change of land use and land cover is, therefore, crucial to understand disturbance of the water cycle around the Lake.

  5. Library Resource
    Journal Articles & Books
    December, 2009
    Tanzania, Africa

    Sustainable agricultural development is a necessity for sustainable economic growth and social development in Africa. Sustainable agriculture largely depends on how effective natural and environmental resources are managed and utilized; it also depends on the security of continuous access to such resources. This research was aimed to look into trends in agricultural productivity, examine the persistence of the environmental insecurity, analyze the relationship between the two, and explore their links to the national development policies.

  6. Library Resource
    Journal Articles & Books
    December, 2016
    Zimbabwe

    Declining crop and livestock production due to a degrading land resource base and changing climate among other biophysical and socio-economic constraints, is increasingly forcing rural households in Zimbabwe and other parts of Southern Africa to rely on common natural resource pools (CNRPs) to supplement their household food and income.

  7. Library Resource
    Journal Articles & Books
    December, 2014
    Kenya, Malawi, Zimbabwe

    Farm typologies are a useful tool to assist in unpacking and understanding the wide diversity among smallholder farms to improve targeting of crop production intensification strategies. Sustainable crop production intensification will require the development of an array of nutrient management strategies tailored to farm-specific conditions, rather than blanket recommendations across diverse farms.

  8. Library Resource
    Journal Articles & Books
    December, 2015
    Ghana

    In the subsistence-based, nutrient-poor soils, and fertilizer-limited agriculture of northern Ghana, 45–65 % of land cover is annually burned for purposes of hunting and agricultural land preparation. The effects of burn-season, fractional nutrient losses, combusted plant parts and vegetation type on the fire-mediated nutrient cycling are unclear.

  9. Library Resource
    Journal Articles & Books
    December, 2014
    Senegal, Western Africa

    The delineation and protection of transhumance corridors are increasingly seen as critical to maintaining livestock mobility in agropastoral areas of West Africa by allowing passage through areas of increasing cropping pressure. Understanding the local politics surrounding the mapping and protection of transhumance corridors is important for policy formulation. This study reports the findings of group meetings in nine local districts (communautés rurales) in eastern Senegal about recently mapped corridors.

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