Fig. 1. Simulated soybean net leaf photosynthesis (A) response to PPF. Symbols are for measured data for eight different leaflets (adapted from Valle et al., 1985), and curves are for simulations using default CROPGRO photosynthetic equations. Open symbols and solid line are for ambient [CO₂] (330 µmolmol^–1); solid symbols and dashed line are for elevated [CO₂] (660 µmol mol^–1).