The WBS (Wa-Bobo-Sikasso) transect is a trans-boundary action site straddling areas of the Upper West Region (Ghana), the Hauts Bassins Region (Burkina Faso), and the Sikasso Region (Mali) and is host to an estimated population of about 5 million over a surface area slightly below 100,000 km2. As such, it represents the Western half of the West Africa region, characterized by low to moderate longitudinal population density gradients and a resulting continuum of extensive and intensive agricultures, in contrast to the significantly more (and more homogeneously) populated Eastern half of West Africa (Nigeria-Niger complex). Dryland Systems samples the WBS gradient at discrete intervals in 100km2 field sites located at Yagtuuri (Lawra District, Ghana), Mahon (Koloko Department, Burkina Faso) and Kani (Koutiala Circle, Mali). These field sites, all selected within so-called ‘action districts’ are paired with control sites (resp. Farakoro, Sayaga, Gbelinkaa) and display variable population densities (resp. intermediate, low, high), contrasted levels of historical state and private infrastructure, investments, and mechanization (resp. low, intermediate, high) that are also reflected in the inherent organizational sophistication and innovative capacity of individual farming communities.
Owing to a relatively favorable natural resource base in the Sudano-Guinean belt with an annual rainfall in the [800-1200mm] range, the WBS action transect features a juxtaposition of intensified, cotton-based rainfed, agroforestry-based, and more traditional rainfed production systems with cereals (maize, millet, sorghum, lowland rice), pulses (cowpea, peanut, Bambara nut) and tubers (potato, sweet potato, yam). Levels of crop-livestock integration (cattle, small ruminants, swine and poultry) vary in a context of moderate but locally declining agro-biodiversity, sustained but locally stabilizing nutrient mining, and declining transhumance. The transect is characterized by a generally intermediate level of food security (supply of calories/ca) but poor nutritional status (e.g. lowest national ratings in Mali). The absence of very large urban centers in the vicinity relieves the rural hinterlands from exposure to large, deleterious environmental impacts but also limits market-driven development opportunities. The imminent completion of the first direct and uninterrupted paved road corridor throughout the transect is progressively unlocking accessibility to the 6th, 7th and 8th largest urban economies of West Africa (Accra, Bamako, Kumasi) and likely to significantly reduce (increase) local input prices (exposure to external trade shocks).
In WBS, Dryland Systems aims to capacitate local communities to sustainably enhance the resource use efficiency (land, water, labor, agro-biodiversity, etc), thereby helping to mitigate the environmental impact of agricultural intensification and to control exposure and vulnerability to the new sources of food, nutrition and economic insecurity associated with rapid integration into large, urban-driven trade markets.