Table 2 Summary of the main characteristics of the study area
From: Alternative approaches to assessing the natural regeneration of Scots pine in a Mediterranean forest
Variables | Mean | Minimum | Maximum | Standard deviation |
|---|---|---|---|---|
Number seedlings per subplot (4 × 4 m) | 17 | 1 | 125 | 24 |
Edaphic variables | ||||
 pH | 6.04 | 4.37 | 8.57 | 1.50 |
 Electric conductivity (mS/cm) | 0.11 | 0.03 | 0.48 | 0.09 |
 Sand (%) | 65.85 | 55.68 | 81.96 | 5.44 |
 Silt (%) | 13.91 | 5.64 | 23.64 | 3.74 |
 Clay (%) | 20.26 | 9.68 | 29.40 | 4.20 |
 Organic matter (%) | 10.86 | 4.75 | 21.97 | 3.58 |
 Available P (mg/kg) | 7.7 | 4.3 | 20.5 | 4.2 |
 Available K (mg/kg) | 181 | 87 | 379 | 61 |
 Available Ca (mEq/100 g) | 4.5 | 1.9 | 9.1 | 1.8 |
 Available Mg (mEq/100 g) | 0.85 | 0.25 | 2.50 | 0.45 |
 Available Na (mEq/100 g) | 0.06 | 0.01 | 0.16 | 0.03 |
 Stoniness (%) | 19.60 | 2.50 | 100 | 15.10 |
Light variable | ||||
 Global Site Factor (0–1) | 0.62 | 0.22 | 0.94 | 0.16 |
Topographic variables | ||||
 Slope (%) | 25 | 5 | 65 | 10 |
 Elevation (m) | 1540 | 1381 | 1730 | 138 |
Competition variables | ||||
 IPOT (0–1) | 0.68 | 0.11 | 0.97 | 0.23 |
 INF | 39.24 | 0.01 | 152.80 | 33.41 |
 Number of retained trees | 6 | 0 | 15 | 4 |
 Number of stumps | 4 | 0 | 17 | 4 |