Figure 3.

Relationships between specific leaf area and parameters of balanced growth hypothesis, leaf : root ratio (a), leaf nitrogen productivity (b), a (c) and specific absorption rate (d). Bold lines represent regression lines for statistically significant relationships. Regression relationships: (a) y = −0.034x + 4.52 (r ² = 0.12, P = 0.29); (b) y = 0.078x + 2.26 (r ² = 0.43, P = 0.017); (c) y = −0.005x + 1.39 (r ² = 0.11, P = 0.33); (d) y = 0.002x − 0.17 (r ² = 0.41, P = 0.035). Bars represent ± SE of the mean.