Agronomy Journal -- Johnson et al. 94 (5): 1071 Figure IG3

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Fig. 3. Rhizoma peanut stem crude protein (CP) response to percentage of incident photosynthetic photon flux density (PPFD) for harvests (H) in 1989 [Harvest 1 ( ${blacksquare}$ ): y = 155 - 1.15x + 0.0105x², R² = 0.68, root mean square error (RMSE) = 6.5; Harvest 2 ( ${blacktriangleup}$ ): y = 127 + 0.158x, r² = 0.37, RMSE = 5.6; Harvest 3: not significant, mean = 138 g kg^-1] and 1990 [Harvest 1: not significant, mean = 106 g kg^-1; Harvest 2 ( ${blacktriangleup}$ ): y = 96.1 + 0.259x, r² = 0.55, RMSE = 6.3; Harvest 3 (•): 101 + 0.128x, r² = 0.50, RMSE = 3.5].