Fig. 3. Seed number per plant and plant growth rate during the critical period for seed set in soybean, sunflower, and maize individuals during two growing seasons at Balcarce. In Season I, symbols indicate plant densities (PD). Normal densities (D) were 29.8, 5.8, and 8.5 p m^-2 in soybean, sunflower, and maize, respectively. Low PD was 0.25D and high PD was 2D. In maize, each point represents seed number in the uppermost ear of nonprolific and prolific plants, except when otherwise indicated. In maize, the fitted curve did not include seed from the second ear in prolific plants. Parameters of the fitted relationships are in Table 3.