Table 4
Coefficients of variation (CV) and normalized (Norm) CVs of all phenological stages in the three approaches: cumulative degree days (CDDs) with optimized lower thresholds (3ºC); CDDs with optimized lower and upper threshold pairs (5, 19ºC); CDDs with optimized lower, upper, and heat threshold triplets (5, 20, 22ºC) and average CDDs as well as the 95% confidence interval (CI) for the best adapted approach (threshold triplet 5, 20, 22ºC).