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Showing items 1 through 9 of 22.
  1. Library Resource
    Journal Articles & Books
    December, 1995
    Nigeria, Africa, Western Africa

    Research scientists must have access to field records to ensure that their experimental treatments are neither masked nor affected by previous land usage. Research fields must be identified on the ground and accurate records kept of all operations and treatments carried out. Several procedures have been developed at IITA which help to ensure accurate field records are maintained and so research accuracy is improved.

  2. Library Resource
    Journal Articles & Books
    January, 1996
    Africa, Sierra Leone

    Paul Richards argues that the war in Sierra Leone and other small wars in Africa do not manifest a "new barbarism". What appears as random, anarchic violence is no such thing. The terrifying military methods of Sierra Leone's soldiers may not fit Western models of warfare, but they are rational and effective. The war must be understood partly as "performance", in which techniques of terror compensate for lack of equipment.

  3. Library Resource
    Conference Papers & Reports
    December, 1995
    Mali, Africa, Western Africa

    In the Sahelian rangelands biomass production is constrained by soil moisture in the drier (100-250 mm) parts and by soil nutrients in the wetter parts. Similarly, for a given Sahelian range, nutrient deficiency would be more prominent in good than in poor rainfall years. To test this hypothesis, fertiliser trials were carried out at sites distributed along the bioclimatic gradient in the Gourma (Mali) over contrasting rainfall years between 1988 and 1992.

  4. Library Resource
    Conference Papers & Reports
    December, 1995
    Africa, Western Africa

    The integration of crops and livestock has often been cited as a model for agricultural development in semi-arid West Africa. Recent formulations treat the adoption of more intensive forms of manuring as a critical step in agricultural development. These analyses have been criticised for ignoring or underestimating the possible negative consequences of such management on rangeland and livestock productivity. This paper critically examines this debate. It is argued that the agronomic benefits of manuring depend largely on nutrient transfers from non-cropped grazing lands.

  5. Library Resource
    Conference Papers & Reports
    December, 1995
    Nigeria, Africa, Western Africa

    ILCA acknowledged the potential for increased animal agriculture in the subhumid zone of West Africa by establishing a research base at Kaduna in northern Nigeria. FulBe agropastoralists were selected at the target group because they own most of the cattle in the zone and cattle are the predominant livestock, at least in terms of biomass and traded products. After consultation with experts, farm surveys, and a simulation analysis, ILCA chose to focus the research on overcoming the dry-season nutrition constraint.

  6. Library Resource
    Conference Papers & Reports
    December, 1995
    Mali, Africa, Western Africa

    This paper deals with foraging behaviour of cattle grazing semi-arid rangelands in the Sahel of Mali. It discusses the location of study site, vegetation in the grazing orbit, herd management and livestock behaviour. Results on seasonal variation in feed supply, selection of the annual grazing orbit in accessible land and of the daily route in the grazing orbit, selection of herbage mass patches within landscape units and selection of species are also presented in the paper.

  7. Library Resource
    Conference Papers & Reports
    December, 1995
    Africa, Western Africa

    Livestock manure is an important source of nutrients for crop production in semi-arid West Africa. An assessment of the potential of manure to sustain crop production calls for an estimation of the amounts of manure that could be produced and captured and the feed resources required to maintain livestock used for manuring. This paper presents estimates of the amounts of manure produced by cattle, goats and sheep fed ad libitum under confinement. A model is presented to predict the yearly faecal output by grazing ruminants under fluctuating feed supplies.

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