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.
Four project focal areas had been identified in two regional states of Ethiopia, namely Oromia and Amhara.
About four grids in each and a total of sixteen grids were randomly generated in the maize growing areas of Jimma, Bako, East Shoa and West Gojam areas – the major maize growing belts of the country. The field experiments were established in the four grids generated at Jimma and Bako areas, whereas the household surveys were conducted in all the sixteen grids generated at all the four TAMASA focal areas.
TAMASA Partners in Ethiopia
TAMASA was primarily implemented by CIMMYT Ethiopia as a host and Ethiopian Agricultural Research Institute (EIAR) as implementing partner.
In addition, other organizations – including Ethiopia’s Agricultural Transformation Agency (ATA), World Vision Ethiopia, GIZ and MoANR – were associate partners who promoted the use of different tools that weredeveloped by the project. Service providers such as development agents (DAs) and district level agricultural experts, who engaged in agricultural extension serviceswere also partners as they were in close contact with the end users (farmers).DAs were involved in managing 2-4 calibration and validation experiments established in their respective kebele (peasant association).
In Ethiopia regional fertilizer recommendations are being widely used. Yet inherent soil fertility status as well as soil fertility management practice varies from village to village and from farmer to farmer.
Nutrient Expert is a decision-support tool (program), developed by the International Plant Nutrition Institute, that helped farmers and extension providers improve fertilizer recommendations, increasing fertilizer use efficiency, productivity and profitability.