Titre :	Annotated directory of organizations dealing with desertification control and dryland development
Type de document :	texte imprimé
Mention d'édition :	UNEP
Editeur :	UNEP
Année de publication :	1986
ISBN/ISSN/EAN :	CI-08078
Note générale :	Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.
Langues :	Anglais (eng)
Mots-clés :	Désertification  Géographie  Ecosystème  Ecologie  Développement économique  Energie  Répertoire
Index. décimale :	577 Ecologie
Résumé :	Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.
Note de contenu :	Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.

Annotated directory of organizations dealing with desertification control and dryland development [texte imprimé]  . -  UNEP . - UNEP, 1986.
ISSN : CI-08078
Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.
Langues : Anglais (eng)

Mots-clés :	Désertification  Géographie  Ecosystème  Ecologie  Développement économique  Energie  Répertoire
Index. décimale :	577 Ecologie
Résumé :	Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.
Note de contenu :	Dertification as a serious threat to the future of mankind become a prominant issue following the devastating famines of the late 1960 and early 1970's in the sahel zone of West Africa and Ethiopia. These famines were repeated in the mid 1980's. The decrease in food production which result in famine are due to a complex of factors which causes lower land productivity. The most important factor in long term decreases in land productivity is the phenomenon of desertification, where vegetation cover is lost and soil is eroded or degraded by nutrient depletion, salinization or waterlogging.