Mortality of Southwestern Ponderosa Pine Sawtimber After Second Partial Harvest
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
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