Fig. 2From: Performance of Quercus suber L. at nursery stage—application of two bio-inoculants under two distinct environmentsConcentrations of P and N in shoot (a, b) and root (c, d) and efficiency of P (e) and N (f) use. For each nursery, different letters indicate significant differences according to Tukey’s multiple range test at P < 0.05. Each bar represents the mean ± S.E. N = 36Back to article page