Height-diameter equations for young-growth red fir in California and southern Oregon

K. Leroy Dolph

doi:10.2737/PSW-RN-408

Treesearch

Height-diameter equations for young-growth red fir in California and southern Oregon

Informally Refereed

Authors:

K. Leroy Dolph

Year:

1989

Type:

Research Note

Station:

Pacific Southwest Research Station

DOI:

https://doi.org/10.2737/PSW-RN-408

Source:

Res. Note PSW-RN-408. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

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Download (PDF 384 KB): https://research.fs.usda.gov/download/treesearch/30697.pdf

Abstract

Total tree height of young-growth red fir can be estimated from the relation of total tree height to diameter outside bark at breast height (DOB). Total tree heights and corresponding diameters were obtained from stem analyses of 562 trees distributed across 56 sampling locations in the true fir forest type of California and Oregon. The resulting equations can predict total tree height as a function of DOB, site index, and stand basal area. Nonlinear regression was used to estimate the equation coefficients. The equations accounted for 70 to 76 percent of the observed variability in total tree heights.

Keywords

Abies magnifica, height estimation, California, Oregon

Citation

Dolph, K. Leroy. 1989. Height-diameter equations for young-growth red fir in California and southern Oregon. Res. Note PSW-RN-408. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p.