The study aims to maximize the utilization of irrigation water. An experiment was conducted at Wadi El-Natroun
Research Station - National Water Research Center for reusing fish farms water in irrigating sugar beet, onion, and Alfalfa
and comparing the obtained results to that for same cropped plants (as a control) using conventional irrigation water for
two successive seasons 2015/2016 and 2016/2017. The results for fish water irrigated crops show an increment in crop
yields, fall in costs, reduction in nitrogenous fertilizer consumption due to the dependence on fish wastes that act as source
for nitrogenous fertilizer, reduction in soil and outputs heavy elements concentration and consequently better healthy life
for humans and animals.