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Research Paper
Title: Growth after thinning ponderosa and Jeffrey pine pole stands in northeastern California
Author: Oliver, William W.
Date: 1972
Source: Res. Paper PSW-RP-85. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 8 p
Station ID: RP-PSW-085
Description: Thinning ponderosa and Jeffrey pine pole stands (6 to 8 inches d.b.h.) on Meyer Site Classes IV and V land (site index 65 to 80) stimulates growth in diameter and height. This was concluded from data on 12 thinned plots scattered over northeastern California, in natural stands and in a plantation. Basal areas immediately after thinning ranged from 13 to 149 square feet per acre. Stands had many dissimilarities before thinning. Nevertheless, results allow the conclusion that thinning to about 80 square feet of basal area per acre will bring such stands to merchantable size as rapidly as possible with negligible loss of cubic-foot volume production.
Key Words: Pinus ponderosa, Pinus jeffreyi, thinning response, diameter growth, basal area, increment, stocking level, Lassen National Forest, Modoc National Forest
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Citation
Oliver, William W. 1972. Growth after thinning ponderosa and Jeffrey pine pole stands in northeastern California Res. Paper PSW-RP-85. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station; 8 p.