Skip to main content

Table 4 Parameter estimates and goodness-of-fit statistics of \(SI\) (Eq. 1) and \(pSI\) (Eq. 4)

From: A growth-effective age-based periodic site-index for the estimation of dynamic forest site productivity under environmental changes

SI

Para

Estim

Std.Error

t-value

Pr( >|t|)

\(R^2\)

\(RSME\)

\(AIC\)

\(\rho\)

\(\delta\)

SI

\({{\varnothing }}_{1}\)

0.9746

0.0041

239.69

< 0.0001

0.996

0.5045

7999

0.81

–0.57

\({{\varnothing }}_{2}\)

0.7030

0.0264

26.59

< 0.0001

     

\({{\varnothing }}_{3}\)

0.9201

0.0134

68.48

< 0.0001

     

pSI

\({{\varnothing }}_{1}\)

0.9586

0.0024

392.12

< 0.0001

0.997

0.4273

6193

0.59

–0.70

\({{\varnothing }}_{2}\)

0.6630

0.0190

34.84

< 0.0001

     

\({{\varnothing }}_{3}\)

0.8812

0.0096

92.05

< 0.0001