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Relationships among the leaf nitrogen concentration (Nm), the leaf mass per area (LMA), and the light-saturated photosynthetic rate per mass (Am). The circles represent data from Glopnet (Wright et al., 2004) and rice as shown. The gray shaded area indicates the 95% confidence interval. Solid lines are standardized major axis (SMA) lines fitted to the rice dataset, and dashed lines SMA lines fitted to the Glopnet dataset. ***P < 0.001.
