Table 4 Descriptive statistics of data of organic horizons and mineral soil layers at study sites

From: Effects of Quercus rubra L. on soil properties and humus forms in 50-year-old and 80-year-old forest stands of Lombardy plain

  Valid N Mean Min Max Std.Dev. Std.Err. Var. Coeff
BV (Bosco Vacaressino)
ROF (red oak forest) SOC1 (%) 20 4.56 2.77 7.62 1.44 0.32 31.52
SOC2 (%) 20 2.67 1.24 3.97 0.87 0.19 32.59
SOC3 (%) 20 1.18 0.41 3.46 0.77 0.17 65.75
CN1 20 15.9 10.1 18.1 1.7 0.4 10.9
CN2 20 16.3 13.9 20.8 1.6 0.4 10.1
CN3 20 14.8 13.0 17.8 1.5 0.3 10.1
pHw1 20 4.2 3.8 4.6 0.2 0.0 4.7
pHw2 20 4.6 4.3 4.8 0.2 0.0 3.5
pHw3 20 4.8 4.4 5.5 0.3 0.1 5.5
BD1 (g cm−3) 20 0.86 0.56 1.13 0.16 0.04 19.06
BD2 (g cm−3) 20 1.10 0.74 1.70 0.25 0.06 22.85
SOCOL (kg m−2) 20 0.63 0.26 0.91 0.22 0.05 34.19
SOCOF (kg m−2) 14 0.30 0.07 0.84 0.21 0.06 70.46
SOCOH (kg m−2) 5 0.21 0.06 0.34 0.11 0.05 53.62
SOCO (kg m−2) 20 0.89 0.33 1.64 0.34 0.08 37.69
SOCstock (kg m−2) 20 11.13 5.97 16.34 2.85 0.64 25.65
Pav (mg kg−1) 20 11.65 3.50 30.50 5.67 1.27 48.62
Rock fragm1 (%) 20 8 1 19 5 1 64
Rock fragm2 (%) 20 9 1 32 7 1 73
Sand2 (g kg−1) 20 626 518 692 40 9 6
Silt2 (g kg−1) 20 273 222 355 31 7 11
Clay2 (g kg−1) 20 101 64 127 16 4 16
Sand3 (g kg−1) 12 683 575 780 72 21 11
Silt3 (g kg−1) 12 251 158 366 71 21 28
Clay3 (g kg−1) 12 66.0 55 80 8 2 13
MF (mixed forest) SOC1 (%) 20 6.58 3.11 12.03 2.79 0.62 42.43
SOC2 (%) 20 3.10 1.67 5.17 0.96 0.21 31.03
SOC3 (%) 20 1.17 0.50 2.09 0.80 0.18 40.92
CN1 20 13.4 10.6 18.7 1.9 0.4 14.2
CN2 20 12.7 7.1 22.7 3.2 0.7 25.1
CN3 12 13.0 11.3 14.5 1.1 0.3 8.4
pHw1 20 5.2 4.1 6.7 0.8 0.2 14.7
pHw2 20 5.3 4.2 6.5 0.7 0.2 13.1
pHw3 12 5.9 4.7 6.6 0.7 0.2 12.5
BD1 (g cm−3) 20 0.71 0.49 0.98 0.14 0.03 19.21
BD2 (g cm−3) 20 1.16 0.88 1.50 0.18 0.04 15.38
SOCOL (kg m−2) 20 0.50 0.19 0.78 0.18 0.04 35.47
SOCOF (kg m−2) 9 0.23 0.14 0.45 0.10 0.03 45.07
SOCOH (kg m−2) - - - - - - -
SOCO (kg m−2) 20 0.61 0.19 1.06 0.23 0.05 37.79
SOCstock (kg m−2) 20 11.88 6.93 19.55 3.07 0.69 25.84
Pav (mg kg−1) 20 10.82 5.30 21.57 4.94 1.10 45.63
Rock fragm1 (%) 20 16 1 31 8 2 52
Rock fragm2 (%) 20 20 5 25 7 2 35
Sand2 (g kg−1) 20 637 566 681 32 7 5
Silt2 (g kg−1) 20 276 223 312 25 6 9
Clay2 (g kg−1) 20 87 59 122 18 4 21
Sand3 (g kg−1) 12 713 589 852 98 28 14
Silt3 (g kg−1) 12 241 100 354 96 28 40
Clay3 (g kg−1) 12 46 39 57 6 2 13
BG (Bosco Ginestre)
ROF (red oak forest) SOC1 (%) 29 5.50 2.82 10.15 1.93 0.36 35.15
  SOC2 (%) 29 2.13 1.55 3.42 0.39 0.07 18.54
  SOC3 (%) 15 1.33 0.80 1.92 0.34 0.09 25.22
  CN1 29 16.4 12.8 19.2 1.7 0.3 10.1
  CN2 29 16.1 9.2 18.5 1.6 0.3 9.9
  CN3 15 15.8 10.6 20.0 2.4 0.6 15.4
  pHw1 29 4.1 3.5 4.5 0.2 0.0 5.3
  pHw2 29 4.5 4.3 5.1 0.1 0.0 3.2
  pHw3 15 4.60 4.50 4.70 0.07 0.02 1.45
  BD1 (g cm−3) 29 0.84 0.15 1.42 0.27 0.05 31.86
  BD2 (g cm−3) 29 1.17 0.55 1.52 0.22 0.04 19.16
  SOCOL (kg m−2) 29 0.58 0.22 1.33 0.25 0.05 42.86
  SOCOF (kg m−2) 29 0.14 0.01 0.37 0.08 0.01 55.90
  SOCOH (kg m−2) 25 1.28 0.42 4.53 1.05 0.21 82.53
  SOCO (kg m−2) 29 1.83 0.33 5.64 1.19 0.22 65.33
  SOCstock (kg m−2) 29 12.04 9.80 15.67 1.57 0.29 12.47
  Pav (mg kg−1) 29 16.61 5.86 28.02 5.82 1.08 35.06
  Rock fragm1 (%) 29 2 0 11 2 0 128
  Rock fragm2 (%) 29 2 0 11 2 0 114
  Sand2 (g kg−1) 29 689 561 767 54 10 8
  Silt2 (g kg−1) 29 248 172 382 50 9 20
  Clay2 (g kg−1) 29 64 19 98 23 4 36
  Sand3 (g kg−1) 15 728 575 841 89 23 12
  Silt3 (g kg−1) 15 220 119 344 78 20 35
  Clay3 (g kg−1) 15 52 35 81 14 4 27
MF (mixed forest) SOC1 (%) 20 4.85 2.11 7.54 1.58 0.35 32.52
  SOC2 (%) 20 1.54 0.99 2.08 0.34 0.08 22.03
  SOC3 (%) 10 0.94 0.52 1.29 0.27 0.08 28.35
  CN1 20 15.7 14.3 18.0 0.9 0.2 5.7
  CN2 20 15.7 13.7 17.7 0.8 0.2 5.4
  CN3 10 16.0 14.0 18.7 1.4 0.5 9.0
  pHw1 20 4.4 4.2 4.8 0.2 0.0 4.1
  pHw2 20 4.5 4.3 4.9 0.1 0.0 3.1
  pHw3 10 4.6 4.4 4.7 0.1 0.0 2.5
  BD1 (g cm−3) 20 0.83 0.44 1.20 0.19 0.04 22.44
  BD2 (g cm−3) 20 1.17 0.95 1.40 0.12 0.03 9.89
  SOCOL (kg m−2) 20 0.38 0.14 0.71 0.18 0.04 47.28
  SOCOF (kg m−2) 19 0.06 0.01 0.19 0.05 0.01 79.85
  SOCOH (kg m−2) 4 0.39 0.12 0.72 0.26 0.13 65.71
  SOCO (kg m−2) 20 0.52 0.16 1.14 0.26 0.06 51.28
  SOCstock (kg m−2) 20 8.31 4.6 12.71 2.83 0.63 30.10
  Pav (mg kg−1) 20 14.07 4.71 22.07 5.48 1.22 38.92
  Rock fragm1 (%) 20 - - - - - -
  Rock fragm2 (%) 20 - - - - - -
  Sand2 (g kg−1) 20 684 537 821 73 16 11
  Silt2 (g kg−1) 20 242 128 342 61 14 25
  Clay2 (g kg−1) 20 74 43 122 24 5 33
  Sand3 (g kg−1) 10 715 652 756 38 12 5
  Silt3 (g kg−1) 10 219 185 267 29 9 13
  Clay3 (g kg−1) 10 65 49 81 12 4 18
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