Table 1 Summary of measured and calculated variables across tree spacing at the tree, board and ring level for each plantation

Tree level:

Montrose and Highlands Plantations

Planting density (stems ha^-1)

403

1097

1808

2981

Survival (%)

97

91

75

57

Basal area (m² ha^-1)

36.3

50.2

51.3

45.3

Relative stand density

6.2

10.0

10.9

10.6

Total stem volume (m³ ha^-1)

349

463

471

409

Mean DBH (cm)

33.9

24.9

21.3

18.0

Mean height (m)

23.5

22.3

21.4

20.7

Mean slenderness

0.67

0.86

0.97

1.11

Top height (m)

24.6

23.8

24.0

22.8

Quadratic mean DBH (cm)

34.4

25.3

21.9

18.4

Tree level:

Highlands Plantation

Mean live crown height (m)

15.2

17.9

18.0

17.0

Mean live crown length ratio

0.37

0.26

0.21

0.27

Mean crown mass (kg)

399

102

115

38

Mean branch diameter (mm)

26.2

20.3

21.4

16.2

Mean branch count

278

176

112

156

Board level:

Highlands Plantation**

Sample size (logs)

11

12

12

11

Sample size (boards)

74

56

39

39

Mean MOE (MPa)

6503

7613

7119

8537

7800

5th perc. MOE (MPa)

4087

4923

5129

5342

4630

5th perc. MOR (MPa)

13.04

15.7

16.6

22.2

11.5

Mean knot frequency

7.1

7.9

8.3

9.1

Mean max knot size (mm)

14.6

10.6

11.7

7.4

WD (kg m^-3)

445

464

447

467

360

Bow (mm m^-1)

1.88

1.75

1.95

1.36

10

Twist (°)

2.08

2.84

3.28

3.46

5

Spring (mm)

1.74

2.5

2.64

1.69

15

Mean RW

  SilviScan (mm)

11.5

8.8

8.7

6.4

Mean MFA

  SilviScan (°)

21.9

16.2

16.9

14.1

Mean WD

  SilviScan (kg m^-3)

418

458

460

491

Ring level:

Montrose and Highlands Plantations

Sample size (trees/radial strips)

20

22

22

20

RW (mm)

9.4

6.8

6.0

5.5

MFA (°)

18.5

13.6

13.1

12.4

WD (kg m^-3)

443

491

502

507

LWP (%)

26.2

31.5

31.0

32.4