Climbing bean is a key crop in the northern Rwandan cropping system, grown by 95% of the interviewed households in the N2Africa baseline survey. N2Africa promotes the use of improved varieties and P based fertilizers in climbing bean cultivation in Rwanda. Through dissemination trials, farmers get the opportunity to test new climbing bean technologies. N2Africa monitors in each country a sample of these multi-locations trials through a field book providing valuable information on driver of variability in yield and in performance of N2Africa technologies.