No abstract

No abstract

No abstract

Voliime distribution based on curved values of measurements from 193 trees was previously reported in Alaska Forest Research Center Technical Note ICxl' , Volumes were computed from the stimtp to a merchantable top equaling 50 percent of d.i.b, (diameter inside bark) at top of the first log or a minimum of 8 inches. Current National Forest inventory standards specify a merchantable top equaling 40 percent of d.b.h. (diameter breast height) but not less than 6 inches. Stump height is equal to d,b,h,, but with a minimtmi of 24 and maximum of 54 inches specified. Measurements of 1,018 trees from 21 widely dispersed logging operations on the Tongass National Forest were taken to current standards. These trees formed a sound basis for updating and strengthening the existing tables. Only the values for the 9and lO-log tree height values of Table 1 and the 4-1/2and 5-log tree height values of Table 2 needed to be balanced with a freehand curve. The tables are applicable to Sitka spruce, western hemlock, and western redcedar of southeast Alaska, 1/ Zach, L, W. Distribution of volume in southeast Alaska trees,