Title

Compatible Volume and Taper Equation for East Texas Loblolly Pine

Document Type

Article

Publication Date

2006

Abstract

The Max-Burkhart taper equation was used to develop compatible taper and volume equations for semi-intensive plantation grown loblolly pine (Pinus taeda L.) trees in east Texas. Semi-intensive plantations in east Texas are characterized by some form of mechanical site preparation, a burn, possibly chemical weed control, improved seedlings if planted after 1985, and possibly a mid-rotation thinning and/or fertilization. The equations in this study were compared to those of Lenhart et al. (1987) and Baldwin and Feduccia (1991) using independent data. The new equations ranked first (sum of ranks = 9) in terms of percent bias and percent SEE for inside-bark predictions of upper-stem diameters and cubic-foot volumes, while the Lenhart et al. (1987) ranked second (sum of ranks = 17) and Baldwin and Feduccia (1991) ranked third (sum of ranks = 22). For outside-bark predictions of volumes and diameters, Baldwin and Feduccia (1991) ranked first (sum of ranks = 12), while the new equations ranked a close second (sum of ranks = 13) and Lenhart et al. (1987) ranked third (sum of ranks = 20). We recommend using the new equations for loblolly pine trees up to 16 inches dbh and provide examples to illustrate their use.

Comments

References Coble, D.W., and K. Hilpp. 2006. Compatible cubic-foot stem volume and upper-stem diameter equations for semi-intensive plantation grown loblolly pine trees in east Texas. South. J. Appl. For. 30(3):132-141, which can be viewed here or by clicking the link above.

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