Agronomy Journal -- Johnson et al. 94 (5): 1071 Figure IG1

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Fig. 1. Rhizoma peanut leaf crude protein (CP) response to percentage of incident photosynthetic photon flux density (PPFD) for harvests (H) in 1989 [Harvest 1 ( ${blacksquare}$ ): y = 254 - 1.12x + 0.013x², R² = 0.85, root mean square error (RMSE) = 7.4; Harvest 2 ( ${blacktriangleup}$ ): y = 222 + 0.34x, r² = 0.40, RMSE = 11.3; Harvest 3 (•): y = 188 + 1.43x - 0.0067x², R² = 0.93, RMSE = 4.5] and 1990 [Harvest 1: not significant, mean = 207 g kg^-1; Harvest 2 ( ${blacktriangleup}$ ): y = 175 + 0.51x, r² = 0.52, RMSE = 13.2; Harvest 3 (•): 177 + 0.60x, r² = 0.90, RMSE = 5.2].