Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 3.
  1. Library Resource
    Articles et Livres
    décembre, 2018
    Égypte, Soudan, Kenya, République-Unie de Tanzanie, Afrique australe, Afrique du Sud, Nigéria, Mexique, Brésil, Colombie, Équateur, Pérou, États-Unis d'Amérique, Japon, Philippines, Iran, Népal

    Agriculture influences and shapes the world’s ecosystems, but not always in a positive way. More than 2.5 billion people are globally involved as stewards of land and water ecosystems that constitute the natural resource base for feeding the current and future world population. Yet, conventional agronomic interventions based on ‘hard’ agricultural engineering compromise various eco-services that are required for sustainable agricultural development.

  2. Library Resource
    Rapports et recherches
    juillet, 2018
    Afrique septentrionale, Tunisie

    Soil erosion is a natural process causing serious land degradation problems. In Tunisia, soil
    erosion represents a serious environmental problem. The Rmel watershed located in the
    Governorate of Zaghouan in north-eastern Tunisia and covering an area of 679 square
    kilometers, suffers from this problem. It was thus selected to estimate annual soil loss using the
    Revised Universal Soil Loss Equation (RUSLE), and geographic information system (GIS).
    RUSLE model’s parameters (R, K, LS, C, and P) were derived from digital elevation model

  3. Library Resource
    Documents de politique et mémoires
    septembre, 2018
    Afrique septentrionale, Tunisie

    Stipagrostis pungens is a perennial grass species which belongs to the Poaceae family. It is usually found with several erect culms, grows up to 1.5 m in height, and forms substantial tufts. It is a tall stiff glabrous grass with pungent leaves, and a C4 grass with sclerophyllous, spine-tipped, inrolled leaves, with sunken stomata. The root system extends laterally for a radius of 20 m or more. The roots are covered throughout their length by a sandy sheath, which is penetrated by the root hairs that occur throughout the entire length of the sheath.

Rechercher dans la bibliothèque foncière

Grâce à notre moteur de recherche robuste, vous pouvez rechercher n'importe quel document parmi les plus de 64 800 ressources hautement conservées dans la bibliothèque du foncier.

Si vous souhaitez avoir un aperçu de ce qui est possible, n'hésitez pas à consulter le guide de recherche.

 

Partagez cette page