peer reviewed ; The CARAIB model was initially designed to describe the dynamics of natural ecosystems and to study the role of vegetation in the global carbon cycle. In order to be able to respond to new challenges (such as the study of climate-vegetation feedback or the evaluation of ecosystem services), the model has been adapted with a new module allowing it to cover all vegetation, natural and managed, such as cultures. Before it can be applied over Belgium, the model was validated at two scales and according to two types of data: (1) on an eddy-covariance measurement site, and (2) on a Belgian national scale based on average yield data by agricultural region and for the recent past. The model was then applied at the Belgian scale, forced under two future climate scenarios up to the year 2035, in order to assess the potential impacts of climate change on the agricultural yields of the six main crops of the country (winter wheat, winter barley, potatoes, maize, sugar beet and rapeseed) and therefore the risks incurred by farmers. ; MASC project, 2014-2018