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Table 1 Description of modeling data (5601 spruce seedlings)

From: Height increment of understorey Norway spruces under different tree canopies

Variable Minimum Maximum Mean Standard deviation
Site index, m 18 30 24.84 2.47
Paludification,% 0 100 7.15 19.10
Canopy trees:     
Basal area, m2/ha 2 52 19.38 10.10
•pine 0 43 4.24 8.35
•spruce 0 41 10.46 9.93
•hardwood 0 34 4.68 7.32
Mean diameter, cm 4.2 78 23.41 10.62
Harwood seedlings:     
Number 0 22043 2765.92 3420.73
Mean height, m 0 7 2.17 1.51
Spruce seedlings:     
Height, m 0.1 6.0 1.51 1.12
Height increment, m 0.0 1.0 0.12 0.13