Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 3.
  1. Library Resource
    Articles et Livres
    décembre, 2014
    Sénégal, Mauritanie, Mali, Burkina Faso, Algérie, Niger, Nigéria, Tchad, Soudan, Soudan du Sud, Érythrée, Cameroun, République centrafricaine, Éthiopie, Afrique, Afrique sub-saharienne, Afrique centrale, Afrique orientale, Afrique septentrionale, Afrique australe, Afrique occidentale

    In Africa, where most agriculture is rainfed, crop growth is limited by water availability. Rainfall variability during a growing season generally translates into variability in crop production. While the seasonality of rainfall in the drier rangelands can play a significant role in productivity, rain-use efficiency (RUE)—the amount of biomass produced (in kilograms of dry matter per hectare) per millimeter of rainfall—also drives production.

  2. Library Resource
    Documents de politique et mémoires
    décembre, 2001
    Asie occidentale, Afrique septentrionale, République arabe syrienne

    Arid shrub-lands in Syria and elsewhere in West Asia and North Africa are widely thought degraded. Characteristic of these areas is a preponderance of unpalatable shrubs or a lack of overall ground cover with a rise in the associated risks of soil erosion. Migrating pastoralists have been the scapegoats for this condition of the range. State steppe interventions of the last forty years have reflected this with programs to supplant customary systems with structures and institutions promoting western grazing systems and technologies.

  3. Library Resource
    Documents de politique et mémoires
    décembre, 2007
    Afrique centrale, Afrique septentrionale, Asie occidentale, Afrique sub-saharienne, Afrique, Asie

    Although several institutional and management approaches that address the degradation of the rangelands have been tested in the dry areas of Central and West Asia and North Africa (CWANA), impact has been limited. Nonetheless, the development of National Action Plans to combat desertification highlights the interest of governments to tackle this issue. Payment for Environmental Services (PES) may be a viable policy option, though, to date, most PES programs have focused on the management of different resources (forests, watersheds).

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