For CXL745 in the Southern US, the model simulated yield swell, with 77% of observed yields falling ±15% around simulated Yp(Fig. 3). Fewer than 6% of observed yields were greater than simulated. Despite only calibrating phenological parameters, the model captured variations in observed yields quite well, although several simulations were conspicuously under-predicted by the model. Average estimated Yp was 12.3 t ha−1 for the Southern US, with a range of 8.2–14.5 t ha−1. Observed yields across all sites averaged 9.8 t ha−1, with a range of 4.3–14.2 t ha−1.