Ethiopia is the third largest producer of maize in Africa, following South Africa and Nigeria (FAOSTAT, 2015). In Ethiopia, Maize is produced in an area of 2 million hectare of land with annual total production of about 6.5 million tons only during the main cropping season alone. Maize productivity during the same year was 3.25 t/ha (CSA, 2013/2014).
In Ethiopia, the national average maize (Zea mays L.) yield still is quite low (3.25 tons) (CSA, 2013/14) compared to the attainable yield of 8.5 ton (Nutrient Expert tool estimation). This high yield gaps, referred as the difference between the attainable and actual yields are attributed to several factors related to crop variety used, crop management practices especially weed management and plant density and soil nutrient managements.