Located in the Sahelian and Saharan zones, Mauritania has one of the poorest agricultural bases in West Africa. Most important to the rural economy has been the livestock subsector. Between 1975 and 1980, herding engaged up to 70 percent of the population, and sedentary farmers constituted about 20 percent of the population. The vast majority of the population lived in the southern one-third of the country, where rainfall levels were high enough to sustain cattle herding. Farming was restricted to the narrow band along the Senegal River where rainfall of up to 600 millimeters per year and annual river flooding sustained crop production as well as large cattle herds. In the dry northern two-thirds of the country, herding was limited to widely scattered pastoral groups that raised camels, sheep, and goats, and farming was restricted to date palms and minuscule plots around oases.

A major reason for Mauritania's economic stagnation since the mid-1970s has been the decline of its rural sector. Government planners neglected both herding and farming until the 1980s, concentrating instead on development in the modern sector. The rural sector was severely affected by droughts from 1968 through 1973 and from 1983 through 1985, and it has suffered from sporadic dry spells in other years. In the 1960s, livestock and crop production together provided 35 to 45 percent of GDP (at constant 1982 prices). From 1970 to 1986, their contribution to GDP (at constant 1982 prices) averaged 28 percent, with herding accounting for about 20 percent of this figure and with crop production falling to as low as 3 to 5 percent in the worst drought years.

Data as of June 1988