Table 6 Variable importance in the projections (VIP) score for Scots pine
From: Variables related to nitrogen deposition improve defoliation models for European forests
Predictor | Models | |||||
|---|---|---|---|---|---|---|
Reference | Reference + BADoAP | Reference + Nthrdep | Reference + BADoAP + Nthrdep | Reference + foliar | Reference + Soil | |
Latitude | 1.20 (−) | 1.23 (−) | 1.01 (−) | 1.02 (−) | 0.93 (−) | 0.98 (−) |
Longitude | 0.80 (−) | 0.92 (−) | 0.91 (−) | 0.82 (−) | 0.59 (−) | 1.22 (−) |
Altitude | 0.42 (−) | 0.42 (−) | 0.81 (−) | 0.95 (−) | 0.33 (−) | 0.78 |
Tree density | 1.15 | 1.14 (−) | 0.94 | 0.92 | 0.89 | 1.08 |
Pr | 0.29 | 0.28 | 0.89 | 0.58 | 0.12 | 0.71 (−) |
Summer Pr | 1.53 | 1.53 | 1.19 | 1.09 | 1.19 | 0.99 (−) |
BADoAP | 0.88 | 0.70 | ||||
Nthrdep | 1.18 (−) | 1.59 (−) | ||||
Foliar N/P | 1.75 | |||||
Foliar N/Ca | 0.65 (−) | |||||
Foliar N/Mg | 1.46 | |||||
Foliar N/K | 0.94 | |||||
Soil pH (CaCl2) | 1.12 (−) | |||||
Soil C/N | 1.24 (−) | |||||
Soil BCE | 0.72 (−) | |||||