HEAL research will focus on climate zone specific needs including integration of red clover in boreal grass leys, intercropping of maize with legumes and the push and pull strategy under semi-arid conditions and new management and use options of leys such as targeted cutting regimes under temperate climate. Agronomic data collection goes beyond the standard (productivity) including dynamic factors (i.e. over a time span) such as forage quality, pre-crop effects, N-fertilizer equivalence and soil physical properties. Ecological data assessment will be site specific with a focus on carbon sequestration and soil biome using metagenomic analysis. Socioeconomic evaluation will include trade-off analysis, monetarization of indirect effects and identification of constraints for the successful implementation of AEM. Research will be carried out in four climatic zones in six European countries (Finland, Estonia, Lithuania, Germany, Ireland, Portugal) using a multi-stakeholder trans- and interdisciplinary approach mainly including agroecologists, agronomists, biologists, economists and sociologists as well as farmers, advisors, nature protectionists and citizens. The holistic evaluation of the overall value of the investigated AEM is expected to result in a reassessment also of their economic value leading to a higher relative excellence mainly compared with highly competitive intensive crops such as maize. Comparative field testing and demonstration is expected to increase the farmers’ awareness of the importance of AEM and the readiness to adopt them.