forestry

1. a unit of length equal to 66 feet
5. A standing dead tree, generally considered nonmerchantable
8. The value or volume of a tree or group of trees as they stand uncut on the stump
9. a relative measure of forest site quality based on height of dominant tree
12. The number of units of basal area per acre (or per hectare) represented by each tree
13. The incline of the terrain, usually expressed as the change in elevation over a hundred feet of horizontal distance
14. the number of trees/plants per unit area
15. An instrument used to measure forest overstory density

2. A hollow, auger instrument used to bore into a tree to remove a sample of wood used to evaluate growth rate and age
3. A formula that is used to estimate lumber volume (in board feet) based on log diameter and length
4. the cross-sectional area of a tree trunk at 4.5 feet above the ground
6. tool used for measuring angles (for heights or slopes)
7. A recognizable area of a forest that is relatively similar in species composition or physical characteristics and can be managed as a single unit
10. the diameter of a tree measured at breast height
11. An area where data are collected to provide information about the forest