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Showing items 1 through 9 of 15.
  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
    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.

  3. 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.

  4. Library Resource
    Conference Papers & Reports
    December, 1995
    Africa, Sub-Saharan Africa

    The important position and role of mixed farming systems in land use intensification in subSaharan Africa is reviewed. This is done by examining the current situation that is followed with a justification for mixed farming. Further sections follow on changing patterns of land use, including the effects of tsetse flies and trypanosomiasis, and on constraints to further crop-livestock integration.

  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.

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