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Table 3 Parameter estimates and goodness-of-fit statistics for Rw l and Rw b6 equations

From: Modelling canopy fuel variables in Pinus pinaster Ait. and Pinus radiata D. Don stands in northwestern Spain

Fuel component

Parameter

P. pinaster

P. radiata

Estimate

R 2

RMSE (kg)

Estimate

R 2

RMSE (kg)

Needles (Rw l )

β 0

2.987

0.924

0.109

2.710

0.865

0.142

β 1

11.55

10.77

ρ

0.7509

0.9025

Twigs < 6 mm (Rw b6)

β 0

3.642

0.883

0.140

3.369

0.862

0.146

β 1

8.496

7.785

ρ

0.7452

0.8698

  1. Rw l and Rw b6 ratio of the cumulative dry weight of each 1-m log to the total weight of needles and fine twigs, respectively; ρ autocorrelation parameter of the AR(1) error structure
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Annals of Forest Science

ISSN: 1297-966X