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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