Evaluating the Adaptability of Different Released Onion (<i>Allium cepa</i> L.) Varieties in West Shewa, Ambo

Onion (Allium cepa) belongs to the family Liliaceae, an important group of crops worldwide. The production and productivity onion in West Showa are constrained by different factors such as lack adopted improved varieties, pest disease attack poor cultural practice. Thus, this study was initiated test best adaptable varieties increase onion. objective therefore, evaluate give high yield resistance Ambo area. Five recently released were used field experiment obtained from Melkasa Agricultural Research Center. conducted at Center on station order tomato varieties. It laid out randomized complete block design with three replications. results analysis variance (ANOVA) showed that had significant (P<0.05) differences for some traits as: leaf length, number leaves total weight first year 2017. Although second all except a difference among treatment. This indication responses each traits. On other hand, length bulb similar response both years. From two years variety Nafis yielding compared parameter it gives around 32.5- 40.7-ton h-1 2017 2018 G. C respectively Ambo. Bombey red also performed next 36.5-ton h-1.