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The basic physical, chemical, and biochemical properties of mountain soils were determined in alpine-zone meadow and moraine areas of the Tatra Mountains (Slovakia, Poland) in 2000–2001. The amount of soil (dry weight soil &lt; 2 mm) varied from 38 to 255 kg m−2 (average of 121 kg m−2) in alpine meadows and averaged 13 kg m−2 in moraine areas. Concentration of organic C was the parameter that most strongly and positively correlated with N, P, S, effective cation exchange capacity (CEC), exchangeable base cations, exchangeable acidity, and all biochemical parameters (C, N, and P in microbial biomass and C mineralisation rates). The relationship between C and P was less straightforward due to inorganic P forms associated with Fe and Al oxides. The average pools of C, N, P, and S, were respectively 696, 41, 2.9, and 1.9 mol m−2 (i.e., 84, 5.7, 0.91 and 0.61 t ha−1) in meadow soils, and 38, 2.1, 0.45 and 0.12 mol m−2 (i.e., 4.5, 0.30, 0.14 and 0.04 t ha−1) in moraine areas. Soil pH was generally low, with the lowest pHH2O values (3.8–4.9) in the A-horizons. Average pools of CEC were 12 and 0.7 eq m−2 in meadows and moraine areas, respectively. The base saturation (BS) was 4–45% (12% on average) of CEC, and was primarily based on Ca2+ and K+ (∼40% and ∼22% of BS, respectively). C:N molar ratios (14–20) were only slightly lower than those observed in the alpine Tatra Mountain zone ∼40 years ago. Concentrations of C, N, and P in soil microbial biomass were high (on average 1.6, 3.4, and 25% of total C, N, and P concentrations), suggesting high microbial activity in alpine soils.

Pools and composition of soils in the alpine zone of the Tatra Mountains