Yield and Yield Components of Onion as Influenced by Intra-Row Spacing and Nitrogen Fertilizer Levels in Rift Valley, Ethiopia

Background and Objectives: Farmers currently employ nationally approved fertilizer rates plant spacing when growing onions, but knowledge of population density that may produce the best bulb production for different cultivars locations is limited. As a result, gardeners frequently use nonspecific densities various cultivars, resulting in sub-optimal yields.
 Materials Methods: A field experiment was conducted 2019 from August to December study effects intra-row levels nitrogen on yield quality onion (Allium cepa L.) variety Nafis under irrigation.
 Results: The main effect stand count both height number leaves per observed. interaction level distance affected days maturity, leaf length, diameter, mean weight, marketable unmarketable yield, all size categories. Increased 10.5 cm N rate 82 kg ha-1 increased total by approximately 3.14 3.21 t ha-1, respectively, decreased 1.38 ha-1.
 Conclusion: at optimum onions. resulted highest net benefit.