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Article
A density management diagram for even-aged Sierra Nevada mixed-conifer stands
Western Journal of Applied Forestry (2012)
  • James N. Long, Utah State University
Abstract
We have developed a density management diagram (DMD) for even-aged mixed-conifer stands in the Sierra Nevada Mountains using forest inventory and analysis (FIA) data. Analysis plots were drawn from FIA plots in California, southern Oregon, and western Nevada which included those conifer species associated with the mixed-conifer forest type. A total of 204 plots met the selection criteria for analysis, which were for even-agedness and species composition. Even-agedness was characterized by a ratio between two calculations of stand density index. Species composition included admixtures of the species characterizing the Sierra Nevada mixed-conifer type with up to 80% of stand basal area contributed by ponderosa and Jeffrey pines. The DMD is unbiased with respect to species composition and therefore should be broadly applicable to the mixed-conifer type. The DMD is intended for use in even-aged stands, but may be used for uneven-aged management where a large-group selection system is used. Examples of density management regimes are illustrated, and guidelines for use are provided.
Keywords
  • silviculture,
  • maximum stand density index,
  • stocking diagram,
  • mixed species
Disciplines
Publication Date
2012
DOI
http://dx.doi.org/10.5849/wjaf.11-036.
Citation Information
James N. Long. "A density management diagram for even-aged Sierra Nevada mixed-conifer stands" Western Journal of Applied Forestry Vol. 27 Iss. 4 (2012) p. 187 - 195
Available at: http://works.bepress.com/jameslong/143/