AfricaNUANCES, an EU FP6 INCO DEV Specific Targeted Project, aims at generating an integrated framework of data bases and computer models.This framework can be used to analyse current livelihoods, explore options for their development and reveal trade-offs between objectives farmers are facing in Sub-Saharan Africa. The abbreviation NUANCES stands for Nutrient Use in Animal and Cropping Systems: Efficiencies and Scales.