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Mortality of Southwestern Ponderosa Pine Sawtimber After Second Partial Harvest

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Abstract:

Mortality in uneven-aged stands of Pinus ponderosa Laws. was less following second partial harvest cuttings than after the first cut because more of the oldest and least vigorous trees had been removed. Average annual losses on a plot cut first to favor dominants and second by improvement selection were 0.11 percent of the reserve trees and 0.17 percent of the residual board-foot volume. Corresponding losses were 0.22 and 0.27 percent in plots cut first by group selection and then to favor dominants, favor subordinates, or as a salvage operation. Lightning, dwarfmistletoe, wind, and insects continued to be the major causes of mortality.

Document Type: Journal Article

Affiliations: Forestry Research Technician, Rocky Mountain Forest and Range Expt., Sta., Forest Service, U. S. Dept. Agric., with central headquarters at Fort Collins in cooperation with Colorado State University

Publication date: February 1, 1963

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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