Table 7. Summary of Yield Models A, B and C.  
Parameter  Model A  Model B  Model C 
Dominant Height Unit: m  Hd = 27.00445 × (1 – Exp(–0.13794 × t))^{0.91678} N = 2634, R^{2 }= 0.858, Bias = 0.008, RMSE = 2.151 → Dominant height curve: Hd = SI20 × ((1 – Exp(–0.13794 × t)) / (1 – Exp(–0.13794 × t)))^{0.91678} → Site Index: SI20 = Hd × ((1 – Exp(–0.13794 × 20)) / (1 – Exp(–0.13794 × t)))^{0.91678} 

Mean Height Unit: m    H = Exp(–0.23378 + 1.06784 × Ln(Hd)) N = 2634, R^{2 }= n/a, Bias = 0.004, RMSE = 0.544 

Mean Diameter Unit: cm  N = 2634, R^{2 }= 0.912, Bias = 0.035, RMSE = 2.165 
D = Exp(0.88996 + 0.13238 × Ln(t) – 0.09009 × Ln(N) + 0.81670 × Ln(Hd)) N = 2634, R^{2 }= n/a, Bias = 0.052, RMSE = 1.942 

Max Diameter Unit: cm  Dmax = Exp(0.03871 + 0.02760 × Ln(t) + 0.04677 × Ln(N) + 0.93499 × (Ln(D)) N = 2634, R^{2 }= n/a, Bias = 0.045, RMSE = 1.314 
Dmax = Exp(0.05253 – 0.01255 × Ln(Hd) + 0.04009 × Ln(N)+0.97489 × Ln(D)) N = 2634, R^{2 }= n/a, Bias = 0.048, RMSE = 1.326 

Basal Area Unit: m^{2} ha^{–1}    G = Exp(–9.75792 + 1.01342 × Ln(N) + 2.06088 × Ln(D)) N = 2634, R^{2 }= n/a, Bias = –0.017, RMSE = 0.315 
 
Volume Unit: m^{3} ha^{–1}  V = 0.29790 + 0.000017 × (D × Hd × N) + 0.00003 × (D2 × Hd × N) N = 2634, R^{2 }= 0.994, Bias = 0.000, RMSE = 4.140 
V = Exp(2.98144 – 0.25922 × Ln(N) + 1.27955 × Ln(G)) N = 2634, R^{2 }= n/a, Bias = 0.593, RMSE = 9.444 
V = Exp(–9.67784 + 0.94275 × Ln(Hd) + 1.01099 × Ln(N) + 1.84026 × Ln(D)) N = 2634, R^{2 }= n/a, Bias = –0.154, RMSE = 4.151 
Tree Height Unit: m  N=58036, R^{2}=0.924, Bias=0.056, RMSE=2.034  
Weibull scale  Scale = –0.12556 + 1.02781 × D  N = 300, R^{2 }= 1.000, Bias = –0.000, RMSE = 0.146  
Weibull shape  Shape = Exp(–2.37613 + 5.52285 × (D / Dmax))  N = 300, R^{2 }= 0.736, Bias = 0.136, RMSE = 1.510  
D = stand mean diameter (cm); D_{max }= stand maximum diameter (cm); G = stand basal area (m^{2} ha^{–1}); H = stand mean height (m); Hd = stand dominant height (m); N = stocking (trees ha^{–1}); V = stand total stem volume (m ha^{–1}); SI20 = stand dominant height at base age of 20 years (m); t = age; d = tree diameter at 1.3 m above the stump (cm); h = tree stem height (m). 