Tree Volume and Taper of Loblolly Pine Varies by Stand Origin

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.

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

Southern Journal of Applied Forestry ◽

10.1093/sjaf/21.3.146 ◽

1997 ◽

Vol 21 (3) ◽

pp. 146-152 ◽

Cited By ~ 32

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.

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Loblolly Pine Provenance Test in Southern Arkansas 25th Year Results

Southern Journal of Applied Forestry ◽

10.1093/sjaf/7.2.71 ◽

1983 ◽

Vol 7 (2) ◽

pp. 71-75 ◽

Cited By ~ 9

Author(s):

O. O. Wells ◽

C. C. Lambeth

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

Gulf Coast ◽

Seed Sources ◽

Potential Gain ◽

Provenance Test ◽

Pinus Taeda L ◽

Forest Managers

Abstract Trees from some eastern seed sources of loblolly pine (Pinus taeda L.) average 8 feet taller than local Arkansas trees after 25 years in southern Arkansas plantings. Trees from most of the range appear well adapted to the climate of southern Arkansas. Only trees from near the Gulf Coast are obviously poorly adapted. Forest managers should weigh this substantial, potential gain carefully against possible risk when choosing seed sources for planting in and near southern Arkansas.

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Site Index Curves for Loblolly Pine Plantations on Cutover Site-Prepared Lands

Southern Journal of Applied Forestry ◽

10.1093/sjaf/9.3.166 ◽

1985 ◽

Vol 9 (3) ◽

pp. 166-169 ◽

Cited By ~ 17

Author(s):

Ralph L. Amateis ◽

Harold E. Burkhart

Keyword(s):

Differential Equation ◽

Pinus Taeda ◽

Loblolly Pine ◽

Analysis Data ◽

Site Index ◽

Height Growth ◽

Pine Plantations ◽

The South ◽

Stem Analysis ◽

Natural Range

Abstract Stem analysis data collected from dominant and codominant loblolly pine (Pinus taeda) trees in cutover, site-prepared plantations were used to develop site index curves. The data were collected over much of the natural range of loblolly pine. A separable differential equation which expresses height growth as a function of both height and age was used to develop the site index curves. These site index curves should be applicable to loblolly pine plantations on cutover, site-prepared lands through much of the South.1

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Economic Evaluation of Old-Field Loblolly Pine Plantation Management Alternatives

Southern Journal of Applied Forestry ◽

10.1093/sjaf/6.1.9 ◽

1982 ◽

Vol 6 (1) ◽

pp. 9-15 ◽

Cited By ~ 2

Author(s):

Stephen H. Broderick ◽

John F. Thurmes ◽

W. David Klemperer

Keyword(s):

Interest Rates ◽

Pinus Taeda ◽

Loblolly Pine ◽

Pine Plantation ◽

Present Value ◽

Old Field ◽

Plantation Management ◽

Growth Simulator ◽

Pinus Taeda L ◽

Management Alternatives

Abstract Using a computerized tree growth simulator for old-field plantations, this study reaches tentative and preliminary conclusions about loblolly pine (Pinus taeda L.) plantation management systems which maximize rotation-start present value under various situations. Assumptions included different product mixes and prices; interest rates; planting spacings; harvest ages; and intensity, frequency, and timing of thinnings.

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Comparison of Log Quality from Even-Aged and Uneven-Aged Loblolly Pine Stands in South Arkansas

Southern Journal of Applied Forestry ◽

10.1093/sjaf/15.1.10 ◽

1991 ◽

Vol 15 (1) ◽

pp. 10-17 ◽

Cited By ~ 9

Author(s):

James M. Guldin ◽

Michael W. Fitzpatrick

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

High Grade ◽

Average Difference ◽

Gulf Region ◽

The West ◽

Stand Management ◽

Pine Stands ◽

Pinus Taeda L ◽

Natural Stands

Abstract Log grade, number of knots, and log volume of the first two logs, as well as form class of the butt log, were compared across three broad sawtimber categories among even-aged plantations, even-aged natural stands, and uneven-aged natural stands of loblolly pine (Pinus taeda L.) in Ashley County, AR. Trees from uneven-aged stands had butt logs of better log grade than even-aged plantations, particularly in the large sawtimber component where the average difference was half a log grade. Compared to even-aged natural stands, trees from uneven-aged stands had logs of comparable grade. Trees from even-aged natural stands produced butt logs of slightly better grade, but with greater taper and less volume per log, than trees from even-aged plantations. To produce high-grade loblolly pine sawtimber in the West Gulf region, natural stand management will suffice; plantation management may require supplemental quality intervention such as artificial pruning. South. J. Appl. For. 15(1):10-17.

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A Prediction System for Cubic Foot Volume of Loblolly Pine Applicable Through Much of its Range

Southern Journal of Applied Forestry ◽

10.1093/sjaf/5.4.186 ◽

1981 ◽

Vol 5 (4) ◽

pp. 186-189 ◽

Cited By ~ 25

Author(s):

Paul C. Van Deusen ◽

Alfred D. Sullivan ◽

Thomas G. Matvey

Keyword(s):

Comparative Analysis ◽

Pinus Taeda ◽

Loblolly Pine ◽

Data Sets ◽

Prediction System ◽

Old Field ◽

Pinus Taeda L ◽

The Many ◽

Volume Equations

Abstract It has been suggested that the many published loblolly pine (Pinus taeda L.) volume equations be consolidated. Comparative analysis demonstrated that a single volume prediction system can be used to estimate total and merchantable volume for old-field plantation-grown loblolly pine through much of its range. Three data sets were pooled to produce total volume equations and ratio equations for merchantable volume. These equations will be particularly useful in areas for which no volume tables have been specifically prepared.

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Rehabilitation of Understocked Loblolly-Shortleaf Pine Stands—II. Development of Intermediate and Suppressed Trees Following Release in Natural Stands

Southern Journal of Applied Forestry ◽

10.1093/sjaf/22.1.41 ◽

1998 ◽

Vol 22 (1) ◽

pp. 41-46 ◽

Cited By ~ 8

Author(s):

James B. Baker ◽

Michael G. Shelton

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

Site Index ◽

Diameter Growth ◽

Shortleaf Pine ◽

High Quality ◽

Pine Stands ◽

Pinus Taeda L ◽

Natural Stands ◽

Crown Dimensions

Abstract Development of 86 intermediate and suppressed loblolly pine (Pinus taeda L.) trees, that had been recently released from overtopping pines and hardwoods, was monitored over a 15 yr period. The trees were growing in natural stands on good sites (site index = 90 ft at 50 yr) that had been recently cut to stocking levels ranging from 10 to 50%. At time of release, the trees averaged 26 yr in age, 4.8 in. in dbh, and 37 ft in height. The trees had averaged only 0.5 in. in dbh growth the 5 yr prior to release (0.1 in./yr). After 15 yr, the 77 surviving trees averaged 59 ft in height and 12.9 in. in dbh, increasing 21 ft in height and 8.1 in. in dbh. During the 15 yr period, crown dimensions of the trees increased markedly as well. On average, crown lengths increased 11 ft (from 16 to 27 ft); crown widths nearly tripled from 9 to 25 ft; and crown volumes increased 11 fold from 608 to 6,700 ft³. The majority of the trees had good form and would produce high-quality sawtimber. Satisfactory response to release was best predicted by initial dbh and live-crown ratio. Results of the study suggest that trees with at least a 20% live-crown ratio should satisfactorily respond to release even though they had developed in lower crown positions of fully stocked uneven-aged stands for 10 to 50 yr. Responding trees rapidly expanded their crowns and accelerated in height and diameter growth. South. J. Appl. For. 22(1):41-46.

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Deriving compatible taper functions from volume ratio equations based on upper-stem height

Canadian Journal of Forest Research ◽

10.1139/cjfr-2017-0108 ◽

2017 ◽

Vol 47 (10) ◽

pp. 1424-1431 ◽

Cited By ~ 3

Author(s):

Thomas B. Lynch ◽

Dehai Zhao ◽

Will Harges ◽

John Paul McTague

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

Volume Ratio ◽

Stem Volume ◽

Stem Height ◽

Ratio Data ◽

Prediction Systems ◽

Pinus Taeda L ◽

Taper Equations ◽

Tree Stem

A very common model for prediction of tree stem volumes to upper-stem height or diameter limits is the use of a merchantable to total volume ratio function multiplied by a total stem volume function. Many users of these prediction systems also desire taper equations that can predict heights to upper-stem diameters. While taper equations compatible with volume ratio equations have been used for many years, compatible taper equations from volume ratio equations that are functions of upper-stem height have been used infrequently. Yet many studies have indicated that height-based ratio equations perform well and frequently have statistics of fit that are comparable with diameter-based volume ratio equations. Compatible taper equations derived from height-based ratio equations are presented here. The methodology that uses height-based merchantable to total volume ratios does not require the solution of a differential equation after differentiating the height-based volume ratio, as is necessary when using the method of deriving taper equations from diameter-based merchantable to total volume ratios. This could be an advantage depending on the complexity of the ratio function. Example taper equations fitted to loblolly pine (Pinus taeda L.) data from the southeastern USA and the state of Oklahoma, USA, indicate good fit to these data, whether fitted directly to taper data or implicitly by using parameters fitted to volume ratio data.

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Predicting Mortality After Thinning in Old-field Loblolly Pine Plantations

Southern Journal of Applied Forestry ◽

10.1093/sjaf/7.1.20 ◽

1983 ◽

Vol 7 (1) ◽

pp. 20-23 ◽

Cited By ~ 3

Author(s):

Ronald C. Lemin ◽

Harold E. Burkhart

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

Coastal Plain ◽

Pine Plantations ◽

Old Field ◽

Survival Curves ◽

Pinus Taeda L

Abstract Four equations were compared for predicting mortality after thinning in old-field loblolly pine (Pinus taeda L.) plantations. The model selected is of the form: N2 = [N1a1 + a2(A2a3 - A1a3)] 1/a1 where N1 and N2 denote trees per acre at ages A1 and A2. Survival curves for thinned, old-field loblolly pine plantations in Coastal Plain and Piedmont Virginia are given.

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