In this study, the combined implementation of LCA and MOGA in farming systems was evaluated versus the combined implementation of LCA and DEA. Watermelon production, as the most common crop in the study area, was chosen as a case study. Three impact categories (GW, RI, and NRE) were selected to be evaluated through the life cycle of watermelon in the region. The farm gate was assessed as the system boundary and a land-based fun