Yields and greenhouse gas emissions of cultivation of red clover-grass leys as assessed by LCA when fertilised with organic or mineral fertilisers

► Greenhouse gas emissions of cultivation are lower with organic fertiliser. ► Red clover sown with grass produces higher yield and lower greenhouse gas emissions. ► Biomass yield and yield stability depend on red clover variety and grass species. ► Carry-over effect of red clover-grass production is highest with organic fertiliser.