Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 2.
  1. Library Resource
    Publication évaluée par des pairs
    décembre, 2014
    Algérie, Soudan, Burkina Faso, Nigéria, Mauritanie, Tchad, Mali, Cameroun, Sénégal, République centrafricaine, Soudan du Sud, Éthiopie, Niger, Érythrée, Afrique

    Crown diameter and tree density were measured in 52 communities in the Sudan-Sahel using satellite imagery to determine the relationships between rainfall and distance from community center to crown size diameter and tree density. As distance from the community center increased, tree density and crown diameter decreased. As rainfall increased, tree density decreased while crown diameter increased. Distance from the community center is a proxy for age since urbanization and our results indicate that older parts of communities show longer and more consistent tree management.

  2. Library Resource
    Articles et Livres
    décembre, 2001
    Burkina Faso, Maroc, Iran, République dominicaine, Viet Nam, Mali, Madagascar, Sri Lanka, Ghana, Congo, Inde, Pakistan, Niger, Thaïlande

    Escalating urban poverty levels in many developing countries and countries in transition have exacerbated the alarming status of food availability and accessibility. Poor urban consumers often reside in the most remote, deprived areas which tend to be eglected by local authorities. Their food security requires specific attention. The challenge is to improve food supply and distribution systems efficiency and dynamism. This should be achieved through effective, concerted and sustainable interventions.

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