Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 11.
  1. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Mali, Afrique, Afrique occidentale

    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.

  2. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Afrique, Afrique occidentale

    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.

  3. Library Resource
    Documents et rapports de conférence
    décembre, 1995

    This workshop was conducted to identify and prioritise areas of rumen ecology which are promising for their potential impact on improving nutrition status of tropical ruminants, to develop a rumen ecology research programme for ILRI based on relevance to developing countries and ILRI's comparative advantage vis-a-vis other institutions, to identify potential collaborators in advanced research institutes, and to define model(s) of collaboration.

  4. Library Resource
    Documents et rapports de conférence
    décembre, 1995

    Animal manure is of vital importance to soil-fertility maintenance in semi-arid West Africa due to its intrinsic value as a soil amendment and because of the low level of inorganic fertiliser use. This paper provides a regional overview of manure utilisation for food crop production. Results of experimental trials and on-farm studies are reviewed to evaluate the agronomic and economic effectiveness of livestock manure as a source of nutrients for millet and sorghum production.

  5. Library Resource
    Documents et rapports de conférence
    décembre, 1995

    Achieving sustainable increases in agricultural production in sub-Saharan Africa is both a regional and a worldwide concern. High human and animal population densities in some areas have surpassed

    land-carrying capacities causing environmental degradation and undermining the long-term stability of these production systems. In attempts to meet the increasing food demands of larger populations,

    farmers are cultivating more land permanently, grazing lands have diminished and many traditional farming practices that formerly allowed land to rejuvenate are disappearing.

  6. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Asie, Asia du sud-est

    The papers presented here by the group covering the states of the Association of South East Asian Nations (ASEAN) had detailed discussions on defining the livestock priorities, research requirements, and ways to achieve these with a focus on Indonesia, Malaysia, the Philippines and Thailand. Discussions were conducted in three sequential phases. In the first phase, each country identified the priority agro-ecological zones (AEZs) and, within each, priority production systems in which livestock research was required. The results are presented in a tabular form.

  7. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Afrique, Asie

    The objectives of this consultation are to identify priority requirements for improved livestock productivity and development of the sustainable production systems in the developing regions; to identify cross-regional priorities, major constraints, the researchable areas and issues in livestock production most likely to bring distinct benefits and impacts; and to assist identification of participants and planning for future regional research workshops.

  8. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Mali, Afrique, Afrique occidentale

    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.

  9. Library Resource
    Documents et rapports de conférence
    décembre, 1995
    Afrique, Afrique occidentale

    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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