Figure captions
Figure 1. Results of two-way ANOVA for the concentrations of labile
organic P (POlab), moderately labile organic P
(POmod), organic P contained in fulvic acids
(Pfulv) and humic acids (Phum) and
residual organic P (POres) in mineral soils (0 – 5 cm)
of technosols under different tree species. Studied factors include tree
species (black locust, black alder, Scots pine, silver birch) and
substrate class (Clays, Ashes, Sands). Whiskers indicate standard
errors. Bars sharing the same letter do not differ significantly (p
< 0.05, Student-Newman-Keuls test).