Much of the production of indigenous/traditional food crops is done by individual small-scale farmers who sell their produce in rural and informal markets with minimal returns and so production is often limited. A major constraint to expanding production is the need to improve seed quality and production techniques. As mentioned earlier, lack of attention and social changes have led to the under-production and under-utilization of these food crops despite their many advantages not only nutritionally but in their adaptation to the variable environments of West Africa. For example, sorghum, millet, bambara groundnut are more drought tolerant than the introduced grains and grain legumes. Fonio (hungry rice), has a relatively short growing cycle and is well adapted to the highly variable rainfall of the Guinean and Sahelian zones. Indigenous leafy vegetables currently have few natural pests and are less demanding of soil and water than nonindigenous varieties.