Skip to main content

Table 2 The parameter estimates and indicators of model fit from new AGB equations

From: Improved allometric equations for tree aboveground biomass estimation in tropical dipterocarp forests of Kalimantan, Indonesia

Model ID Equations Parameter estimates n Adj.r 2 RMSE (kg) AICc
a b c d
D 1 0.125 D 2.533 0.125 (0.033) 2.533 (0.062)    108 0.821 3215 2061
D2 Exp (−2.845 + 2.726 (Ln D) –0.094 (Ln D)2 – 0.271 (Ln D)3) × 1.071 −2.845 (0.479) 2.726 (0.122) −0.094 (0.104) −0.271 (0.141) 108 0.810 3303 2061
DH 3 0.068 D 2.268 H 0.483 0.068 (0.027) 2.268 (0.215) 0.483 (0.200)   108 0.813 3281 2053
DH4 0.041 (D 2 H)0.986 0.041 (0.013) 0.986 (0.024)    108 0.804 3358 2064
5 0.086D 2.388 Ĥ 0.326 0.086 (0.027) 2.388 (0.084) 0.326 (0.132)   108 0.823 3191 2059
6 0.05 (D 2 Ĥ)1.011 0.050 (0.016) 1.011 (0.027)    108 0.798 3409 2068
DG7 0.236D 2.5 G 1.079 0.236 (0.042) 2.500 (0.040) 1.079 (1.079)   108 0.918 2180 1971
DG 8 0.277 (D 2 G)1.238 0.277 (0.042) 1.238 (0.019)    108 0.924 2095 1963
DGH 9 0.071 (D 2 GH)0.973 0.071 (0.014) 0.973 (0.016)    108 0.909 2287 1981
DGĤ 10 0.093 (D 2 )0.994 0.093 (0.021) 0.994 (0.020)    108 0.895 2452 1997
  1. Correction factors had been incorporated into the equations. The models presented in bold are the best equations from each model type. Values in parentheses are the standard errors