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Table 4 Characteristics of the fertility of soil organic horizons in subzones/areas

From: Associations between forest vegetation and the fertility of soil organic horizons in northwestern Russia

Cajander’s site types pH Total (g∙kg−1) С/N ratio Exchangeable (cmol(+)∙kg− 1) BS (%) Extractable P (mg∙kg− 1)
CaCl2 H2O C N acidity Ca Mg K Na Al
Karelia, northern taiga
 3 3.4* 4.4 419 11.8 37 4.3 12.3 2.9 2.4 0.1 0.7 80 860
0.1** 0.1 15 0.8 3 0.3 1.1 0.5 0.1 0 0.2 2 44
 4 3.4 4.3 405 9.3 46 4.6 10.8 2.4 2.2 0.2 0.9 76 803
0.1 0.1 13 0.4 2 0.3 0.8 0.2 0.1 0 0.2 2 31
 5 3.4 4.3 403 8.4 50 3.7 7.9 1.8 1.8 0.2 0.7 75 730
0.1 0.1 40 1.3 10 0.3 1.0 0.5 0.7 0.1 0.2 3 129
 6 3.0 4.1 415 5.3 78 7.1 4.8 1.6 1.6 0.2 1.9 53 588
Karelia, middle taiga
 1 3.9 5.0 268 11.2 25 2.3 14.4 3.5 1.9 0.1 0.8 89 773
0.1 0.3 39 3.0 3 0.5 4.5 0.5 0.6 0.0 0.6 5 200
 2 3.9 4.8 434 15.1 30 3.4 21.3 5.6 2.7 0.1 0.4 88 942
0.2 0.2 48 1.6 3 0.7 3.4 1.8 0.4 0 0.1 4 93
 3 3.7 4.7 336 10.8 37 3.7 15.8 3.8 2.3 0.1 0.7 83 820
0.2 0.2 29 0.8 8 0.5 2.0 0.5 0.1 0 0.2 3 33
 4 3.3 4.5 351 9.0 42 4.7 10.4 2.5 1.7 0.1 1.5 72 671
0.2 0.2 30 0.7 5 0.7 1.9 0.5 0.2 0 0.4 5 41
 5 3.0 4.1 495 9.4 53 5.4 7.5 1.1 1.3 0.1 1.1 65 682
Karelian Isthmus, middle taiga
 2 3.5 4.4 399 12.9 33 4.6 14.3 2.5 3.3 0.1 1.2 81 720
0.1 0.1 26 1.2 3 0.7 1.1 0.3 0.2 0 0.3 3 51
 3 3.6 4.5 372 12.2 32 4.2 13.5 2.4 3.1 0.1 1.5 82 686
0.1 0.1 18 0.6 2 0.4 0.7 0.2 0.1 0 0.3 2 29
 4 3.3 4.2 416 11.2 38 5.1 11.5 1.8 3.1 0.1 1.8 76 612
0.1 0.1 14 0.8 3 0.6 1.1 0 0.2 0 0.4 3 25
 5 3.4 4.3 454 13.6 33 3.1 12.2 1.5 2.1 0.1 0.6 84 514
  1. * - mean, ** - standard error