Notes: Selecting Foliage and Growth Variables for Relating Insect Defoliation to Coniferous Tree Growth
Abstract:Correlations between estimators of foliage levels and basal area growth were compared for use in regression equations relating western spruce budworm defoliation to growth on 192 Douglas-fir and grand fir trees. Foliage terms that included one- to four-year-old foliage had the highest correlations, and adjusting foliage estimates to account for decreased foliage production improved correlations. Calibrations from a stand growth model predicting nondefoliated growth yielded the most precise estimates, as did adjusting growth estimates for annual weather impacts using a model including soil and weather factors. For. Sci. 34(1):236-242.
Document Type: Miscellaneous
Affiliations: Assistant Professor, School of Forestry and Wildlife Resources, Virginia Polytechnic Institute and State University, Blacksburg 24061
Publication date: 1988-03-01
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