Title: Determining site index accurately in even-aged stands

Author: Erdmann, Gayne G.; Peterson, Ralph M., Jr.

Year: 1992

Publication: In: Hutchinson, Jay G., ed. Northern hardwood notes. St. Paul, MN.: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 4.01

Abstract: Good site index estimates are necessary for intensive forest management. To get tree age used in determining site index, increment cores are commonly used. The diffuse-porous rings of northern hardwoods, though, are difficult to count in cores, so many site index estimates are imprecise. Also, measuring the height of standing trees is more difficult and less accurate than measuring the height of felled ones.