Figure 5. Means for planting dates within each year (n = 56 for each symbol) for (A) plant height; (B) plant density at emergence (E) (2004 only) and at maturity (M); (C) seed yield; (D) final 100-seed weight. The best-fitting regression (quadratic or linear) was computed for the four data points of each year, except for 100-seed weight, for which linearity was evident for only three of the four data points each year (see text for further details).