In this report we demonstrate the potential of remote sensing for 1) mapping cover crops and producing metrics associated to their development, 2) estimating cover crop biomass and the associated annual carbon storage effect based on remote sensing products assimilitation in the SAFYE-CO2 agronomical model (embeded in the AgriCarbon-EO processing chain). Then we describe our global approach for estimating and validating cropland carbon budgets over several years starting from the work done for future implementations of the coupled SAFYE-CO2/AMG models. Last we describe the soil sampling campaign that was conducted over the Nataïs case study, adapted from the procedure developed by Agricircle, that provided soil properties data for future applications of the coupled SAFYE-CO2/AMG modelling approach and validation of the spatialized C budget estimates.