Resource description:
Crop diversification has gained interest due to its role in climate change adaptation. While previous studies have focused on farm productivity and income variability, this study examines the relationship between crop diversification and farm performance, considering farm size, socio-economic status and location. Using French Farm Accountancy Data Network data from 2010 to 2022, we analyse 19,822 observations from 3,246 crop-focused farms. Results show that small farms benefit from crop diversification, while large farms face income challenges from diversification. Additionally, crop diversification increases the efficiency of larger farms. The results highlight the need for flexible policies to balance economic viability with environmental objectives.