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Table 4 Chemical and microbiological properties of the forest and arable soils

From: Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use

Site Soil layer Statistics pH (H2O) Total, % K2SO4 extraction, mg kg-1 MB*
     C N C N NH4-N NO3-N C N
FOREST Litter, 2–3 cm mean 5.6 29.3 1.0 898 90 32.8 4.7 nd nd
   STD 0.3 5.5 0.2 436 40 21.7 3.5 nd nd
  Humus layer, 0–4 cm mean 4.3 3.4 0.2 32.6 3.1 0.5 0.2 84 9.2
   STD 0.1 1.2 0.1 17 1.4 0.2 0.2 43 7.9
  Mineral layer, 4–8 cm mean 4.3 1.1 0.1 22 1.2 0.2 0.0 9.8 1.3
   STD 0.1 0.2 0.0 4 0.3 0.1 0.1 3.9 0.4
ARABLE 0–4 cm mean 7.9 1.2 0.1 5 1.1 0.0 0.7 50 6.3
   STD 0.1 0.1 0.0 1 0.2 0.0 0.2 4.7 0.7
  4–8 cm mean 7.9 1.2 0.1 6 1.7 0.0 1.2 71 8.0
   STD 0.1 0.1 0.0 1 0.3 0.0 0.3 14 0.7
  1. STD – standard deviation, 5 replications; * – C and N immobilized in microbial biomass (MB), mg kg-1; nd-not determined