IPCC Fourth Assessment Report: Climate Change 2007
Climate Change 2007: Working Group II: Impacts, Adaptation and Vulnerability
Figure 11.2

Figure 11.2: Change in national gross value of wheat from historical baseline values (%) for 2070 as a result of increases in CO2 and changes in temperature and rainfall: (a) without adaptation and (b) with adaptations of changed planting dates and varieties (Howden and Jones, 2004).