According to the model predictions, the maximum estimated biomass was obtained for sweet sorghum under high inputs, and this crop reached a total of 43 Mg ha–1on DOY 279 (Fig. 7; Table 2). At the other extreme, maize reached its maximum biomass under high inputs of 21 Mg ha–1 on DOY 248. The maximum biomass (Ymax) and the time when it was reached (te) were significantly affected by the crop input interaction (see supplemental materials). In practice, the most meaningful result might be in accurately representing treatment differences and their significance level (Pvalue) and having a model capable of producing robust predictions within the range of observed values (i.e., interpolation) and, with more caution, outside the range of observed values (i.e., extrapolation)