Table 1.

Mean benefit of adapting wheat cropping systems to impact of temperature and rainfall changes calculated as the difference between percent yield changes with and without adaptation

Adaptation benefit	Rainfall change	Temperature change, °C
		Less than 2°C	2–4°C	Greater than 4°C
Yield change, %	Rainfall increase	26.9 ± 6.0	18.7 ± 4.7	17.4 ± 4.0
	Rainfall decrease	9.0 ± 5.3	11.1 ± 2.6	15.0 (na)

Values are means and standard errors [not applicable (na): n = 1]. The mean benefit of adapting was not significantly different for temperate and tropical systems (17.9% vs. 18.6%, P = 0.86). Data sources are listed in figure 5.2 of Easterling et al. (1).