Fig. 2. Amount of P in various fractions in the soil samples (1–5) before the construction in various parts of the constructed wetland (CW) (see Fig. 1). (A) Total P (H₂SO₄–P in ignited samples), (B) organic P, (C) inorganic P, (D) NH₄F-soluble "Al bound P," (E) NaOH-soluble "Fe bound P," and (F) acid-soluble "Ca bound P." Closed symbols (1, 2) present idle meadow and open symbols (3, 4, 5) present the actively cultivated area.