Stem-profile Functions for Predicting Multiple-Product Volumes in Natural Longleaf Pines

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Abstract
The stem-profile (taper) functions presented for natural longleaf pine (Pinus palustris Mill.) trees growing in the East Gulf region, when integrated, permit the prediction of volume between any two heights on a stem for three broad crown-ratio classes. Conversely, by iteration, thevolume between any two diameters on a stem can be predicted. The functions generally predict cubic-foot volumes that are within ± 0.5 ft³ of observed volume and account for at least 98% of the variation in observed volume. Comparisons are made with some existing D³H and volume-ratiovolume equations. Also, example applications of the functions are given along with an announcement (in the Appendix) of a computer program to evaluate the functions for cubic-foot volume. South. J. Appl. For. 11(3):161-167.

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