Rocky Mountain Research Station Publications

RMRS Online Publication - Journal Articles, External Publications, and Special Reports
Compatible taper equation for loblolly pine

McClure, J. P.; Czaplewski, R. L. 1986. Compatible taper equation for loblolly pine. Canadian Journal of Forest Research. 16(6): 1272-1277.

Cao's compatible, segmented polynomial taper equation (Q. V. Cao, H. E. Burkhart, and T. A. Max. For. Sci. 26: 71-80. 1980) is fitted to a large loblolly pine data set from the southeastern United States. Equations are presented that predict diameter at a given height, height to a given top diameter, and volume below a given position on the main stem. All estimates are inside bark. A condition is given that forces the Cao model to be exactly compatible with any total main stem volume equation. An exact volume estimation formula is derived. Twelve benchmarks, which represent realistic utilization criteria, are used to describe expected errors in actually applying the taper equation rather than the more common fit statistics that describe errors encountered when estimating model parameters. Errors in using the fitted model are very similar to errors using Cao's estimates.

Keywords: taper equation, loblolly pine, Cao model

About PDFs: For best results, do not open the PDF in your Web browser. Right-click on the PDF link to download the PDF file directly to your computer. Click here for more PDF help.

The PDF below was scanned and converted to text. Some errors may occur.

Download Article

PDF File Size: 515 K

Title: RMRS Other Publications: Compatible taper equation for loblolly pine
Electronic Publish Date: September 3, 2009
Last Update:
September 3, 2009

RMRS Publications | Order a publication | Contact Us