Considerable efforts have been devoted to understanding and developing technologies and practices that can help the agricultural sector reduce its greenhouse gas emissions and adapt to the impacts of climate change. The uptake of these "climate-friendly" technologies and practices, however, remains low. This report, based on a comprehensive review of the literature, analyses barriers that may prevent farmers from adopting climate-friendly practices. A multitude of potential barriers exist, some associated with farm-level constraints, others operating at the sector level, or created by existing policies. A series of recommendations are made to properly identify these types of barriers and to select the right instruments that would work to implement effective policy solutions.