Stradiv is an interdisciplinary project that aims at unraveling how plant diversification of agrosystems can support their ecological transition toward a more sustainable production to the benefit of farmers and the society. Based on 3 main case study (in Madagascar, French West Indies, and Central America) and 3 complementary case study (in Cameroun, Burkina Faso and Brazil), we measure the effect of plant diversification schemes on biophysical processes. Stakeholders are included at all steps in the co-design of optimal strategies that maximize the provision of ecosystem services. The co-conception process relies on a pool of knowledge resulting from biophysical studies and from local knowledge. It bridges biophysical and social and human sciences to concretely address the issue of the ecological transition of cropping systems.