Fig. 1. Relationship between yield per plant and vegetative biomass per plant for (A) soybean cultivar A3901 and (B) maize hybrid DK752. Parameters of Eq. [3] fitted to soybean data were a = –0.47 and b = 1.09 (R² = 0.970). Parameters of Eq. [1] fitted to maize data were a = 1.42, b = 18.57, c = 0.0012, and d = 196.0 (R² = 0.965). Each point represents one plant.