Cassava is a robust crop that gives a high yield, even under marginal growing conditions. The main constituents in cassava are water (60 g 100 g1) and carbohydrates (38 g 100 g1), while the content of proteins, fat and fibers is limited (1.4, 0.28 and 1.8 g 100 g1) . The abovementioned percentages are approximations as large variations between and within cultivars exist . The starch concentration is generally higher than in wheat , while the protein level is significantly lower than the 7e14% found in wheat . The large variation in chemical composition of cassava is expected to be
reflected in the cassava flour commercially available. This variation is further affected by cassava flour being made by different manufacturing processes and being available as unfermented and fermented flour. In addition to the common cassava flour, the flour made from the starchy water discarded from the press is also commercially available and sold as sweet and sour flour.