Data analysis (Table 4) shows that sunflower morphological variables and yield components were significantly (P< 0.01) affected by the cassava waste water doses. The increase in sunflower capitulum and in fresh and dry matter yield of over-ground plant parts showed linear growth as the cassava wastewater increased (Figures 8(a), 8(b), 8(c), and 8(d)). The maximum and minimum profits in fresh over-ground plant parts were predicted by the regression models as 20,967 and 65,881 kg ha−1 for 0 and 136 m3 ha−1 , respectively, providing income of 214%.