Fig. 2. Standardized residual plots from (A) standard ANOVA of the turnip yields, (B) weighted ANOVA of the turnip yields, with weights inversely proportional to the densities, (C) standard ANOVA of log-transformed turnip yields, and (D) a linear mixed model (LMM) (Residual Maximum Likelihood, REML) analysis with variances changing across sowing dates and sowing densities.