Fig. 1. Observed and NLEAP-predicted available soil water in the root zone at harvest for potato (P) and barley (B) grown in the San Luis Valley. Regression line for the barley growing period (Line B) is y = -0.44 + 1.3x (r² = 0.81, significant at P < 0.05). The potato growing period has an equation as follows (Line P): y = -0.20 + 1.2x (r² = 0.93, significant at P < 0.01). The regression equation for the whole data set P and B (line not shown) is y = -0.27 + 1.2x (r² = 0.82, significant at P < 0.01)