OFRA is consolidating existing research data on fertilizer response trials across sub-Saharan African region. To address gaps emerging from previous work, fertilizer response trials are set up in the 13 OFRA countries across different AEZs. All these data are collected using standard excel templates and uploaded into this portal. The templates can be downloaded from here after logging in with a user name and password, the same are required when uploading data or downloading data that has been indicated as private. All country project partners have been set up with these login credentials. The data are used to develop crop nutrient response functions that are applied for profit maximization using a linear programming routine implemented in Microsoft Excel and packaged as a fertilizer optimization tool (FOT). Dataset and attribute level Meta data are maintained in separate documents.