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Table 4 Parameters and goodness of fit statistics for the various models used in estimating biomass components combining all stand ages

From: Development and evaluation of robust tree biomass equations for rubber tree (Hevea brasiliensis) plantations in India

Components Model Intercept Slope R 2 AICc RMSE
AGB 1 −2.82 (0.21)a 2.60 (0.07) 0.954 −170.6 0.270
2 −3.31 (0.15) 0.95 (0.02) 0.977 −217.1 0.192
3 −3.49 (0.32) 3.03 (0.12) 0.911 −126.6 0.377
4 −14.47 (0.46) 1.58 (0.04) 0.963 −186.2 0.241
Foliage 1 −4.41 (0.51) 1.87 (0.18) 0.635 −49.0 0.672
2 −4.48 (0.57) 0.65 (0.07) 0.588 −40.9 0.713
3 −3.91 (0.71) 1.82 (0.27) 0.418 −17.8 0.847
4 −11.89 (1.41) 1.07 (0.12) 0.559 −36.4 0.738
Branches 1 −2.76 (0.46) 2.03 (0.16) 0.714 −62.5 0.607
2 −2.95 (0.51) 0.71 (0.06) 0.687 −56.4 0.636
3 −2.60 (0.65) 2.11 (0.24) 0.543 −31.1 0.767
4 −11.32 (1.25) 1.19 (0.10) 0.672 −53.4 0.650
Stem 1 −3.97 (0.27) 2.88 (0.09) 0.934 −131.8 0.362
2 −4.57 (0.19) 1.05 (0.02) 0.972 −188.4 0.237
3 −4.95 (0.29) 3.45 (0.11) 0.941 −139.4 0.342
4 −17.09 (0.50) 1.77 (0.04) 0.967 −176.5 0.259
Coarse roots 1 −2.4 (0.23) 1.7 (0.08) 0.871 −155.1 0.305
2 −2.64 (0.23) 0.60 (0.03) 0.883 −161.9 0.290
3 −2.69 (0.32) 1.91 (0.12) 0.802 −126.7 0.375
4 −9.84 (0.56) 1.02 (0.05) 0.881 −160.9 0.292
5 −0.53 (0.12) 0.64 (0.03) 0.905 −175.4 0.261
Total biomass 1 −2.38 (0.20) 2.49 (0.07) 0.954 −176.7 0.259
2 −2.84 (0.15) 0.90 (0.02) 0.976 −221.2 0.184
3 −3.00 (0.31) 2.89 (0.11) 0.908 −130.9 0.365
4 −13.50 (0.45) 1.51 (0.04) 0.963 −191.1 0.232
  1. Goodness of fit statistics of the best model is in bold face
  2. aFigures in parenthesis are standard errors of estimates