Problem Crop diversification experiences (CDE) of actors enhancing the sustainability of farming systems are being developed across Europe. In order to support the development of diversification, there is a need to learn from existing CDE and to better understand their drivers, the barriers they face, and the solutions developed to overcome these. Solution Modelling farming system players��� worldviews across a diversity of 11 European CDE mobilising agronomic innovations to highlight drivers and barriers that they face across three main dimensions: agronomy, socio-economy and ecology.