Fig. 2From: Testing allometric scaling relationships in plant rootsSMA results of the relationship between plant fine root productivity (P) and biomass (M) at a global scale. Values are log-transformed (base 10). The line shows the fitted regression equation log10P = − 0.080 + 0.98 × log10M (95% C.I. for slope is 0.93 to 1.03, r2 = 0.51, n = 826). The short dash lines refer to the 95% confidence intervals. The pink line refers to the 1:1 lineBack to article page