A Faster Way to Cruise Sawtimber

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When d.b.h. and log length are tallied, volume estimation by prism cruising is reasonably accurate. However, the common practice of saving time by estimating stand volume based on tally-tree height, without regard to d.b.h., can result in errors exceeding 50 percent of actual volume. From 54 prism cruises in Mississippi, mean volumes per acre per tally tree, by log length, were calculated to be the local volume factors. But there was so much variation between timber stands that use of the local factors would have produced errors exceeding 5 percent in more than two-thirds of the 54 cruises. During the study, however, a way to estimate timber was found that is even less tedious but relatively accurate. The method involves the multiplication of the total number of counted logs in tallied trees by a factor which is adjusted by a simple correction calculation.

Document Type: Journal Article

Affiliations: Administrative Assistant, Univ. of Missouri School of Forestry, Columbia

Publication date: June 1, 1969

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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