Conceptually, the benefits of irrigation are realized through improvements in agricultural productivity. At household level, the agricultural production increases could be followed by improvements in income generation and food consumption patterns. The goal of this research was to examine the relationship between irrigation, income generation and household consumption patterns for the rural smallholders with pre-scaling up of onion variety (Allium cepa) of Bombie and Adama Red. A survey was undertaken in 500 households and information was collected on demographics, landholdings and family labor, irrigation, returns of cultivation, consumption behaviors, farmer perceptions and experiences, and other related variables. The results show that using irrigation the Bombie red yield on average was 193 quintal per ha with maturity date of 90-100 days.