Effects of four levels each of water-hyadnth and fertilizer were studied on sorghum hybrid CSH-5 at the Agricultural College farm, Dharwad, during kharif 1986. Water-hyacinth a nine tonnes per hectare gave 6.4,10.8 and 16.3 per cent higher grain and 8.2,7.3 and 14.8 per cent higher stover yield than that of water-hyacinth at six, three and zero tonnes per hectare, respectively. Water-hyacinth at nine tonnes per hectare resulted in saving of 32.5 per cent of recommended fertilizer dose, valued at Rs. 331.89. Net profit was higher under nine tonnes water-hyacinth per hectare plus recommended fertilizer dose. Return per rupee spent was higher under nine tonnes water-hyacinth per hectare.