Dataset description Data correspond to 149 farmers from four EU countries (Spain, Italy, Croatia, and the Czech Republic). This database contains information about farmer characteristics, farm structural characteristics, and farm management, and also contains preferences and attitudinal constructs (such as agribusiness objectives, and environmental attitudes and opinions) and variables related to questions about the potential adoption of the proposed innovations Collection Data was collected online from March to August 2021, using a survey instrument, administered to farmers face to face. Utility The data provides insight into farmer acceptance of five different circular agricultural innovations designed to reduce nutrient loss at the farm level and focused on improving environmental sustainability.