76 страниц. 2011 год. LAP Lambert Academic Publishing Both biotic and abiotic stresses are significantly affecting maize production and productivity in Ethiopia. However, research emphasis had been given for biotic research problems only. Hence, we should consider abiotic factors like lodging problems in our research agenda; if we want to maximize production and productivity of maize in Ethiopia. It was found that, yield and lodging resistance can be improved by practicing restricted and simultaneous selection in some of yield contributing traits in maize.