Predicting release of advance reproduction of mixed conifer species in California following overstory removal

Phase I of this study was aimed at determining the most important variables influencing post-release height growth of white fir. Of the 17 variables measured on 96 samples, the most important were pre-release height growth, live crown ratio, and pattern of heigth growth which accounted for 46 percen...

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Veröffentlicht in:Forest science 1985-01, Vol.31 (1), p.3-15
Hauptverfasser: Helms, J.A, Standiford, R.B
Format: Artikel
Sprache:eng
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Zusammenfassung:Phase I of this study was aimed at determining the most important variables influencing post-release height growth of white fir. Of the 17 variables measured on 96 samples, the most important were pre-release height growth, live crown ratio, and pattern of heigth growth which accounted for 46 percent of the variability. The addition of four more factors accounted for an additional 10 percent of the variability. Average time before response was between 2 and 4 years. In phase II, the sample was enlarged to a total of 592 trees of white fir, red fir, and Douglasfir. Discriminant analysis was used to characterize trees which were likely to exceed alternative levels of average annual post-release height growth. Using pre-release height growth and live crown ratio, the post-release height growth of each species was correctly classified 63 to 84 percent of the time.
ISSN:0015-749X
1938-3738