Dimensionally compatible volume and taper equations

2001 ◽  
Vol 31 (5) ◽  
pp. 797-803 ◽  
Author(s):  
Mahadev Sharma ◽  
Richard G Oderwald
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Pine Trees ◽  
Volume Equation ◽  
Pinus Taeda L ◽  
Taper Equation ◽  
Natural Stands ◽  
Taper Equations ◽  
Volume Equations

A dimensional analysis approach was applied to derive analytically consistent tree taper and volume equations. To achieve numerical consistency between the taper and volume equations, parameters of the taper and the volume equations were estimated simultaneously. Data from loblolly pine (Pinus taeda L.) trees grown in natural stands in the Coastal Plain of North Carolina and the Coastal Plain and Piedmont areas of Virginia were used to estimate the parameters. The dimensionally compatible volume equation is shown to be a better equation for estimation of the volume of loblolly pine trees grown in these sites and can be applied for the estimation of total volume. The taper equation accurately predicts tree diameters from butt to the tree tip. It can be used to predict the diameter at any specified height and to predict height to any top diameter limit.

scholarly journals Volume and Taper Equations for Thinned and Unthinned Loblolly Pine Trees in Cutover, Site-Prepared Plantations

1997 ◽  
Vol 21 (3) ◽  
pp. 146-152 ◽  
Author(s):  
Gudaye Tasissa ◽  
Harold E. Burkhart ◽  
Ralph L. Amateis
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Analysis Data ◽  
The South ◽  
Stem Analysis ◽  
Pine Trees ◽  
Pinus Taeda L ◽  
Taper Equations ◽  
Volume Equations

Abstract Stem analysis data from loblolly pine (Pinus taeda L.) trees grown in cutover, site-prepared plantations across the South were used to develop total and merchantable cubic-foot volume equations and implicit taper relationships for thinned and unthinned conditions. The data were obtained from trees felled during plot establishment for a thinning study and from trees felled during the second thinning of a portion of the same plots 12 yr later. The volume equations presented can be used to predict volume to any specified height or diameter limit for loblolly pine trees in thinned and unthinned stands on cutover site-prepared areas. The taper relationships enable the prediction of upper stem diameters and heights. South. J. Appl. For. 21(3):146-152.

Tree Volume and Taper of Loblolly Pine Varies by Stand Origin

1987 ◽  
Vol 11 (4) ◽  
pp. 185-189 ◽  
Author(s):  
Ralph L. Amateis ◽  
Harold E. Burkhart
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Analysis Data ◽  
Old Field ◽  
Stem Analysis ◽  
Tree Form ◽  
Pinus Taeda L ◽  
Natural Stands ◽  
Taper Equations ◽  
Forest Managers

Abstract Stem analysis data were used to examine volume, height-dbh, form and taper relationships for loblolly pine (Pinus taeda L.) trees grown in unthinned old-field plantations, cutover-site plantations, and natural stands. Results showed significant differences in volume, height-dbh, tree form and taper relationships for loblolly pine grown in stands from these three origins. Thus, in order to accurately predict total and merchantable volumes as well as upper stem diameters and heights, forest managers should apply separate volume and taper equations for each stand class. South. J. Appl. For. 11(4):185-189.

scholarly journals Susceptibility of parent and interspecific F1 hybrid pine trees to tip moth damage in a coastal North Carolina planting

2001 ◽  
Vol 31 (5) ◽  
pp. 919-923 ◽  
Author(s):  
Maxine T Highsmith ◽  
John Frampton ◽  
David O'Malley ◽  
James Richmond ◽  
Martesa Webb
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Dominant Mode ◽  
Slash Pine ◽  
F1 Hybrids ◽  
F1 Hybrid ◽  
Pine Trees ◽  
Rhyacionia Frustrana ◽  
Hybrid Pine ◽  
Pinus Taeda L

Tip moth damage among families of parent pine species and their interspecific F1 hybrids was quantitatively assessed in a coastal planting in North Carolina. Three slash pine (Pinus elliotti var. elliotti Engelm.), two loblolly pine (Pinus taeda L.), and four interspecific F1 hybrid pine families were used. The F1 hybrids were as susceptible to damage by Nantucket pine tip moth (Rhyacionia frustrana (Comst.)), as was their susceptible loblolly pine parent. Their phenotypes support a dominant or partially dominant mode of inheritance for susceptibility. The phenotype of one slash pine family was not statistically different from the phenotypes of the loblolly and F1 hybrid pines. The high susceptibility of that one slash pine family appeared to be intrinsic, even though slash pine is considered resistant to tip moth damage. Tip moth damage on the two other slash pine families was significantly lower.

Basal Area and Diameter Distribution Models for Loblolly Pine Plantations with Hardwood Competition in the Piedmont and Upper Coastal Plain

1992 ◽  
Vol 16 (2) ◽  
pp. 93-98 ◽  
Author(s):  
Steven A. Knowe
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Basal Area ◽  
Simulation Models ◽  
Diameter Distribution ◽  
Distribution Models ◽  
Pinus Taeda L ◽  
The Impact ◽  
Volume Equations

Abstract Prediction equations were developed for basal area and percentiles of diameter distributions to account for the hardwood component in site-prepared, Piedmont and Upper Coastal Plain loblolly pine (Pinus taeda L.) plantations. Unlike existing stand-level simulation models that incorporate hardwood competition, the new equations resulted in constant total basal area regardless of the amount of hardwood competition and permitted the variance of the diameter distribution to increase with increasing proportion of hardwoods. The equations presented can be used with existing dominant height, survival, and volume equations as a tool for assessing the impact of hardwoods on loblolly pine yield. South. J. Appl. For. 16(2):93-98.

Cubic-Foot Volume Equations for Loblolly Pine Trees in Cutover, Site-Prepared Plantations

1987 ◽  
Vol 11 (4) ◽  
pp. 190-192 ◽  
Author(s):  
Ralph L. Amateis ◽  
Harold E. Burkhart
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Profile Data ◽  
The South ◽  
Pine Trees ◽  
Pinus Taeda L ◽  
Total Tree ◽  
Volume Equations

Abstract Stem profile data from loblolly pine (Pinus taeda L.) trees grown in cutover, site-prepared plantations across much of the South were used to develop total and merchantable cubic-foot volume equations. The equations presented here can be used for predicting total tree volume and merchantable volume to any height or top diameter limit. Implicit taper relationships associated with the merchantable volume equations allow prediction of upper stem diameters and heights. South. J. Appl. For. 11(4):190-192.

Loblolly Pine Management and Utilization—State of the Art

1984 ◽  
Vol 8 (2) ◽  
pp. 88-96 ◽  
Author(s):  
R. C. Kellison ◽  
Sam Gingrich
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
Loblolly Pine ◽  
Forest Industry ◽  
East Region ◽  
Genetically Improved ◽  
Natural Range ◽  
Pinus Taeda L ◽  
Natural Stands ◽  
The Cost

Abstract The management and utilization of loblolly pine (Pinus taeda L.) were the topics of the Symposium on the Loblolly Pine Ecosystem (East Region) held in Raleigh, North Carolina, on December 8-10, 1982. The East Region is comprised of Virginia, North Carolina, South Carolina, Georgia, and Florida. A second symposium is scheduled for spring 1984 to cover the remaining natural range of loblolly pine. Plantations constitute about 27 percent of the loblolly pine resource of the East Region, with about two-thirds of the area belonging to forest industry. Natural stands can be established for about one-third the cost of plantations, where plans are made for natural regeneration. Optimum value is realized from plantations where site preparation is complete and where pests, competing vegetation, and stocking are controlled. Genetically improved planting stock, fertilization, and thinning are integral parts of plantation forestry. Maintaining site productivity is one of the greatest challenges facing the forest industry.

scholarly journals Calibrating a Segmented Taper Equation with Two Diameter Measurements

2009 ◽  
Vol 33 (2) ◽  
pp. 58-61 ◽  
Author(s):  
Quang V. Cao
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Polynomial Regression ◽  
Stem Diameter ◽  
Laser Technology ◽  
Breast Height ◽  
Tree Data ◽  
Pinus Taeda L ◽  
Taper Equation ◽  
Taper Equations

Abstract Recent advances in laser technology help make possible accurate and affordable measurements of upper-stem diameters. These measurements can be used to calibrate results from a taper equation to improve the accuracy of diameter predictions along the tree bole. Felled-tree data from a loblolly pine (Pinus taeda L.) plantation were used to evaluate two methods for calibrating outputs from a segmented taper equation with parameters either obtained from the data in this study or originally published by <xref ref-type="bibr" rid="B5-2124">Max and Burkhart (1976</xref>, Segmented polynomial regression applied to taper equations, For. Sci. 22:283–289). For outside-bark diameters, although a simple calibration for dbh gave desirable results, a better calibration involving both dbh and an upper-stem diameter provided significant improvements in predicting tree taper. Results varied depending on where the diameter was measured, with optimum gains obtained when the upper-stem diameter was measured at the midpoint between breast height and the tree tip. For inside-bark diameters, the calibration for inside-bark dbh actually produced inferior predictions, whereas the calibration based on both dbh and an upper-stem diameter offered only modest improvements over the unadjusted predictions.

A Tree Volume Equation Based On Two Lower Stem Diameters for Loblolly Pine in the Southeastern United States

1993 ◽  
Vol 17 (4) ◽  
pp. 160-162
Author(s):  
José Antonio Aleixo da Silva ◽  
Bruce E. Borders
Keyword(s):  
South Carolina ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Main Stem ◽  
Independent Variable ◽  
Volume Equation ◽  
Pinus Taeda L ◽  
New Equation ◽  
Volume Equations ◽  
Lower Stem

Abstract A new cubic volume equation was developed for plantation grown loblolly pine (Pinus taeda L.) in Coastal Plain and Piedmont regions of Georgia and South Carolina. This volume equation uses the volume of the main stem between 2.25 and 5.00 ft as the independent variable. In practice, users simply need to measure diameters at 2.25 and 5.00 ft from the ground to obtain an estimate of the total cubic foot volume of the main stem. This new equation compares favorably to traditional volume equations which use dbh and total height as independent variables. South. J. Appl. For. 17(3):160-162.

Use of Taper Curve Solved by an Algebraic Method in Silvicultural Research

1986 ◽  
Vol 62 (6) ◽  
pp. 529-532 ◽  
Author(s):  
Guillaime Thérien ◽  
Claude Camiré
Keyword(s):  
Spline Function ◽  
Algebraic Method ◽  
Solution Model ◽  
Algebraic Solution ◽  
Silvicultural Treatments ◽  
Volume Equation ◽  
Taper Equation ◽  
Taper Equations ◽  
Cubic Spline Function ◽  
Volume Equations

Taper equations are commonly used to predict the bole shape and to calculate its volume. In this study, a new algebraic solution model is proposed for research purposes. This model was found to be as accurate as cubic spline function and simple to use. It would be particularly appropriate for research on stand reactions after silvicultural treatments. The study also evaluated compatible volume equations. The required accuracy can be obtained only with a volume equation taking into account a form class coefficient. Key words: balsam fir, taper equation, volume equation, algebraic solution model

Sign in / Sign up

Export Citation Format

Share Document