Effects of Different Irrigation Levels and Fertilizer Rates on Yield, Yield Components and Water Productivity of Onion at Adami Tulu Agricultural Research Center

Today’s agriculture sector faces a complex series of challenges to cope with the demands for sustainable management and production, which entails an increase in food production ensure security while using less water per unit output reducing nitrogen (N) fertilizer losses through leaching. The experiment was conducted at Adami Tulu Agricultural Research Center on-station study effect different irrigation levels N-fertilizer rates on plant height, bulb yield, diameter, height productivity onion. treatments had factorial combinations three watering four amounts. Results indicated that highest (53.07 cm), (6.13 diameter (6.21 marketable yield (241.39 qt/ha) total (252.89 were obtained from full fully N-fertilized compared deficit conditions. recorded 60% ETc level 150 Kg/ha application rate, but reduction 80% rate not significant. Hence, if is limiting factor, 100% could be suggested apply. But becomes 232 would more appropriate growing onion area. Therefore these can used as one package technology all growers better