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Table II

Main stand variables of monospecies plots used to fit equation (13) (data from 2nd and 3rd SNFI). N - Natural stands; P - Plantation stands.

Species Origin No. Statistic No. Hdom G IV S*
plots Trees ha−1 (m) (m2 ha−1) (m3 ha−1 y−1)
N 177 Mean 768 15.8 34.9 7.6 0.54
Pinus sylvestris std 540.9 4.3 12.1 7.64.6 0.17
Min 129 5.0 16.0 0.2 0.27
Max 2911 27.8 67.9 26.4 1.02

P 133 Mean 1370 11.1 30.8 11.3 0.52
std 686.8 3.9 11.5 4.3 0.17
Min 310 5.2 14.9 1.5 0.29
Max 3547 22.3 59.8 22.3 0.99

Quercus pyrenaica 215 Mean 931 9.5 13.4 2.4 0.36
std 721.4 7.3 7.3 1.5 0.18
Min 79 4.8 3.8 0.1 0.10
Max 3675 17.4 40.2 8.4 1.09
*

S is the stocking degree (G/Gmax).