Fig. 1 Comparison of the correlation between the simulated and measured maize yields at nine locations in different states of the USA. The left vertical axis is the lack of fit of the regression (1 - r²), and the right vertical axis is the correlation coefficient (r). Results from (A) CERES-Maize model and (B) ALMANAC model are shown for locations in the states of Minnesota (MN), New York (NY), Iowa (IA), Illinois (IL), Nebraska (NE), Missouri (MO), Kansas (KS), Louisiana (LA), and Texas (TX). Data are from Kiniry et al. (1997)