The Facts Behind Improvement Selection
Author: Pearson, G. A.
Source: Journal of Forestry, Volume 41, Number 10, 1 October 1943 , pp. 740-752(13)
Publisher: Society of American Foresters
Abstract:Periodic measurements on a cutover area of ponderosa pine in the Fort Valley Experimental Forest show the performance of some 8,000 individual trees under different conditions over periods of from 15 to 30 years. When the trees are examined singly, the growth rate bears no consistent relation to "age-and-vigor" classes but is closely related to ground space as indicated by position in the stand. These findings form the basis of marking practice under the method of improvement selection, described in an earlier article. The present article gives these findings in greater detail and discusses their application to marking practice in tree groups representing three distinct age classes.
Document Type: Journal Article
Affiliations: Senior Silviculturist, Southwestern Forest and Range Experiment Station, maintained by the Forest Service, U. S. Department of Agriculture, for Arizona, New Mexico, and west Texas
Publication date: October 1, 1943
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