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Table 7 Comparison the effect of independent (ENGLS) and simultaneous (NSUR) fitting on confidence intervals and prediction intervals using models for biomass components and total biomass of individuals of Pinus elliottii Engelm.: leaves, branches, bole without bark, bole bark, root and total

From: Simultaneous estimation as alternative to independent modeling of tree biomass

Idade (anos)

Component

Average tree biomass (kg)

Biomass per hectare (t)

PD

AD

AD

IC

IP

IC

IP

IC (%)

IP (%)

6

Leaves

0.00

3.53

0.00

3.72

−0.18

56.18

Branches

1.09

5.93

1.15

6.25

39.92

34.76

Bole

2.35

4.79

2.48

5.05

52.37

11.34

Bark

0.15

4.68

0.16

4.93

10.96

50.51

Root

0.05

5.35

0.05

5.65

2.87

53.52

Total

9.00

5.95

9.50

6.28

71.71

10.44

10

Leaves

−0.15

3.49

−0.15

3.66

−11.56

55.66

Branches

0.92

5.86

0.97

6.15

20.96

33.67

Bole

2.39

5.03

2.51

5.28

22.92

11.63

Bark

−0.78

4.20

−0.82

4.41

−42.61

45.01

Root

−0.23

5.07

−0.25

5.32

−10.11

49.99

Total

10.26

6.37

10.76

6.68

53.17

10.95

15

Leaves

−0.02

3.51

−0.02

3.58

−1.40

55.85

Branches

0.67

5.79

0.68

5.91

16.04

33.43

Bole

0.38

4.59

0.39

4.68

4.52

10.72

Bark

−1.46

4.09

−1.49

4.18

−124.78

44.36

Root

−0.40

5.03

−0.41

5.13

−18.69

49.81

Total

8.09

5.93

8.25

6.05

47.26

10.28

20

Leaves

0.00

3.37

0.00

3.28

0.05

52.52

Branches

1.11

5.86

1.08

5.69

19.80

32.99

Bole

−1.50

4.11

−1.46

3.99

−16.52

9.57

Bark

−1.92

3.72

−1.87

3.61

−132.66

40.09

Root

−0.51

4.72

−0.50

4.59

−17.34

45.81

Total

7.72

5.83

7.50

5.67

40.57

10.05

  1. Differences were calculated for the independent fitting, for example: CI ADTotal 6 years = 12.55 − 3.55 = 9.00 and \( \mathrm{C}\mathrm{I}\ {\mathrm{PD}}_{\mathrm{Total}\ 6\mathrm{years}} = \frac{9.00}{12.55}100=71.71\% \)
  2. CI confidence intervals, PI prediction intervals, AD absolute difference, PD percent difference