Explanation of data file - Plot48.dat

File name: Plot48.doc

Units: English

This file provides an explanation of the data files contained in Plot48.dat. Data has been collected from permanent plots for 14 inventories (12, 15, 16, 19, 24, 27, 30, 35, 36, 37, 40, 43, 45, and 48).

PLOT48.DAT

VARIABLES

1. Plot number

2. Target basal area per acre - 30, 50, 70, 90, and 150. Note that 150 is not basal area but a code which indicates control plots.

3. Pruning level - 25, 40, and 50 indicate that crowns were pruned to 25, 40 and 50 percent of the total tree height (age 12 and 15). 100 is a code indicating no pruning.

4. Age - age of trees from seed.

5. Number of trees before thinning (NB).

6. Number of trees after thinning (NA) (because of thinning and mortality NA is not always equal to NB and current NB is always equal to last NA.). The same is true for the following diameters and heights.

7. The quadratic mean diameter at breast height before thinning (DB) (in inches).

8. The quadratic mean diameter at breast height after thinning (DA) (in inches).

9. Forthcoming annual diameter increment of the tree with mean basal area computed using constant number of trees. Z = (DB(next age) - DA(current age))/age interval).

10. The average mean total height (height corresponding to DB) before thinning (in feet).

11. The average mean total height (height corresponding to DA) after thinning (in feet).

12. Weight, wt=n*(age interval).

13. The increment of age.

14. Basal area per acre before thinning (feet²/acre).

15. Basal area per acre after thinning (feet²/acre).

16. Cubic volume before thinning (feet³/acre).

17. Cubic volume after thinning (feet³/acre).