Yield and Yield Components of Onion (Allium cepa L.) as Affected by Irrigation Scheduling and Nitrogen Fertilization at Hawassa Area Districts in Southern Ethiopia

B. Tsegaye, Bizuayehu T, A. Woldemichael and Mohammed A.


Research Paper I Published February,2016


Journal of Agricultural Science and Food Technology  Vol. 2 (2), pp.15-20





This study investigated the effects of different Nitrogen (N) levels and irrigation regimes on yield and yield components of Onion (Allium cepa L.) at Hawassa area district, southern Ethiopia in 2012. It was a factorial experiment laid out in split plot design with three replications of four irrigation regimes and five N levels. Data on yield and yield components were collected and analyzed. Application of N at different levels and irrigation regime increased total and marketable bulb yield over the unfertilized plot, and their interaction showed a significant effect on the average bulb weight; mean bulb diameter and water productivity of onion. Further increase in N application beyond 100 kg Nha–1 and irrigation beyond 75% crop evapo-transpiration ETc did not bring about significant changes. Therefore, 100 kg Nha-1 and irrigation at 75% ETc can be tentatively recommended for onion production to the studied area.

Key Words: Onion, Nitrogen Level, Irrigation Regime, Bulb Yield and Yield Components

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