Driven by the rapid population growth and the increasing demand for food, agricultural expansion is the most dramatic change in Niger’s landscapes. Over the period 1975–2013, cultivated areas have increased from 12.6 percent in 1975 to 18.1 percent in 2000 and 24.5 percent in 2013. This represents a total increase of 94.2 percent. Agriculture expansion mostly occurred on the productive sandy soils of the valleys in the Tillaberi region, where cropland is now encroaching on traditional pastoral lands. On the surrounding plateaus and terraces of western Niger, a mosaic of steppe and short grass savanna dominates. The Zinder-Maradi region, already heavily cultivated in 1975, is now a wall-to-wall homogeneous agricultural landscape. However, agriculture is still expanding eastward on the remaining short grass Sahelian savannas of the Manga regions. In addition, an increase of 50 percent in irrigated agriculture was observed along the Niger River.
La région de Tahoua au Niger couvre une superficie de 113 317 km2 . Elle est limitée au nord par la région d'Agadez, au nord-ouest par la République du Mali, à l'ouest par les régions de Tillaberi et Dosso, à l'est par la région de Maradi, et au sud par la République fédérale du Nigeria.
