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Table 3 Height, crown height, and DBH data for the selected PSPs at Ribbonwood Station

From: The influence of initial and post-thinning stand density on Douglas-fir branch diameter at two sites in New Zealand

Nominal initial stand density (stems ha−1)

Nominal post-thinning stand density (stems ha−1)

Actual post-thinning stand density (stems ha−1)

Actual stand density (stems ha−1) at age 29 years

Mean green crown height (m) at 12 years

Mean tree height (m) at time of thinning (10.1 years)

Mean green crown height (m) at age 29 years

Mean tree height (m) at age 29 years

Mean DBH (cm) at age 29 years

833

250

250

250

0.1

7.3

8.4

25.2

51.4

1333

250

250

250

0.1

7.0

6.8

24.7

46.9

2000

250

250

250

0.1

8.3

8.3

25.4

47.7

833

500

500

500

0.1

6.7

10.5

24.5

41.4

1333

500

500

500

0.1

7.3

11.6

24.9

42.5

2000

500

500

500

0.1

7.5

12.0

24.8

38.9

833

750

738

738

0.4

7.0

12.6

22.8

34.1

1333

750

750

750

0.2

8.3

12.2

24.1

34.8

2000

750

750

750

0.1

8.2

14.0

24.8

35.8

833

-

788

750

0.2

6.7

12.2

24.4

35.9

833

-

813

775

0.4

6.9

12.4

22.9

33.7

1333

-

1113

1025

0.2

6.5

12.7

23.5

30.8

1333

-

1263

1038

0.4

6.5

12.8

23.1

28.5

2000

-

1838

1688

1.4

7.4

15.5

23.0

26.4

2000

-

1950

1800

1.2

7.1

14.2

22.1

25.3

  1. The earliest green crown measurements in this experiment were at 12 years