Fig. 3From: Temporal changes of fine root overyielding and foraging strategies in planted monoculture and mixed forestsFine root biomass in pure Pinus, Cinnamomum and mixed Pinus–Cinnamomum stands in 0–10, 10–20 and 20–30 cm soil depth at the age of 10, 24 and 45 years. Error bars indicate standard error. Different letters indicate significant differences among different stands within the same soil profile and age stages (P < 0.05)Back to article page