Pearl millet
Niger's agricultural and livestock sectors are the mainstay of all but 18% of the population. Fourteen percent of Niger's GDP is generated by livestock production (camels, goats, sheep and cattle), said to support 29% of the population. The 15% of Niger's land that is arable is found mainly along its southern border with Nigeria. Rainfall varies and when insufficient, Niger has difficulty feeding its population and must rely on grain purchases and food aid to meet food requirements. Although the rains in 2000 were not good, those in 2001 were plentiful and well distributed. Pearl millet, sorghum, and cassava are Niger's principal rain-fed subsistence crops. Irrigated rice for internal consumption, while expensive, has, since the devaluation of the CFA franc, sold for below the price of imported rice, encouraging additional production. Cowpeas and onions are grown for commercial export, as are small quantities of garlic, peppers, potatoes, and wheat. Groundnuts, and to a lesser degree Cotton, introduced by former colonial power France in the 1930s and 1950s respectively, account for most of the world market for Nigerien industrial agriculture. Prior to the mass exploitation of uranium in the early 1970s, groundnut oil was the largest Nigerien export by worth.