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Dynamiques des ressources environnementales et mutations des systèmes agro-sylvo-pastoraux en milieu tropical semi aride : le cas de la vallée d'Arewa ( Niger central)

Abstract : We often evoke, concerning Sahelian agriculture, the whims of its pluviometry particularly the catastrophic droughts of 1973 and 1984. For all that, except from these episodes of exceptional crises and their dramatic consequences, farmers know how and the dynamism of the rural communities, made it possible to overcome many difficulties. The solidarities between generations, families'cohesion, an informal popular economy, are as many answers to the uncertainty and to bad situations. These last twenty five years, in the valley of Arewa, the doubling of the population was accompanied with a tremendous movement of cultures'extension, with for corollary, a saturation of arables and a noticeable decreasing of the vegetable coverage. This latter has provoked chain reactions on the other constituents of the ecosystem, the escalation of the erosives phenomena has particularly started important disturbances of kori hydrological regime. The extensive model of the pluvial cereal culture has reached its limits, whereas the progressive disappearance of the fallow contributed to the grounds' chemical impoverishment. In answer to this ecological and land crisis, the farmers adjusted their production systems. The alluvial terraces saw the development of onions'culture and fruits' cultivation thanks to the small irrigation, whereas the forestry of the neem became an alternative to the shortage of firewood. The ground formerly known as common inheritance, has today, a market value, speculative strategies appear and result in kinds of social reorganization. The transformations which take place today in the valley of Arewa, cannot be thus summarized in the only degradation of the environmental resources. A way is opened towards the intensification, the regional economic frame lends itself to it, the recent decentralization opens perspectives of support to the production, although some doubts remain on the actual implementation of its financing.
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Contributor : Francois Fauquet <>
Submitted on : Thursday, November 3, 2005 - 6:01:29 PM
Last modification on : Friday, November 20, 2020 - 11:16:06 AM
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François Fauquet. Dynamiques des ressources environnementales et mutations des systèmes agro-sylvo-pastoraux en milieu tropical semi aride : le cas de la vallée d'Arewa ( Niger central). Géographie. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00010859⟩

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