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Notes: Site Quality Influences on Biomass Estimates for White Spruce Plantations

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Abstract:

Separate biomass estimation equations were developed for white spruce (Picea glauca (Moench) Voss) from plantations of low, medium, and high site quality in northern Minnesota. Site quality was defined by site index. Differences in regression coefficients among these quality-specific equations were statistically significant (P < 0.005). Estimates of aboveground biomass for a dominant tree based on those equations differed from an estimate based on an overall equation from all data. As tree size increased, estimates from the overall equation were less than those from the specific equation for high-quality sites, and greater than those from the equation for low-quality sites. Site quality differences can significantly affect biomass estimates for white spruce in plantations. In most cases, however, the practical significance of these effects should be small. Forest Sci. 32:443-446.

Keywords: Picea glauca; productivity; site index

Document Type: Miscellaneous

Affiliations: Professor, Departments of Soil Science and Forest Resources, University of Minnesota, St. Paul, MN 55108

Publication date: June 1, 1986

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