期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：1990
卷号：1
期号：2
页码：105-108
出版社：John Libbey Eurotext
摘要：Author Bernard Peyre de Fabrègues IEMVT/CIRAD 10, rue Pierre Curie 94700 Maisons-Alfort Page(s) : 105-8 Published in: 1990 Since thirty years approximately the Sahel has suffered from revealed rain deficiences. These have revealed the over-exploitation of the sponteneous vegetal production, due to the everlasting increase of humans and domestic animals for the past fifty years. One of the most visible result of this over-exploitation is the progressive elimination of forage trees and arbusts.
