Growth and Yield Predictions for Thinned and Unthinned Slash Pine Plantations on Cutover Sites in the West Gulf Region

Abstract A new compatible whole-stand growth-and-yield model to predict total tree cubic-foot volume per acre yield (outside and inside bark) was developed for unmanaged loblolly pine (Pinus taeda) and slash pine (Pinus elliottii) plantations in East Texas. This model was compared with the noncompatible whole-stand model of Lenhart (<xref ref-type="bibr" rid="B15-2127">Lenhart, 1996</xref>, Total and partial stand-level yield prediction for loblolly and slash pine plantations in east Texas, South. J. Appl. For. 20(1):36–41) and the <xref ref-type="bibr" rid="B15-2127">Lenhart (1996)</xref> model refit to current data. For the two species, all three models were evaluated with independent observed data. The model developed in this study outperformed both Lenhart models in prediction of future yield and basal area per acre for all age classes combined and by 5-year age classes. The Lenhart models consistently overestimated yield and basal area per acre. All three models predicted surviving trees per acre similarly. An example is also provided to show users how to use the new whole-stand model.

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Postthinning growth and yield of row-thinned and selectively thinned loblolly and slash pine plantations

Canadian Journal of Forest Research ◽

10.1139/x89-035 ◽

1989 ◽

Vol 19 (2) ◽

pp. 247-256 ◽

Cited By ~ 9

Author(s):

V. C. Baldwin Jr. ◽

D. P. Feduccia ◽

J. D. Haywood

Keyword(s):

Loblolly Pine ◽

Unit Area ◽

Basal Area ◽

Site Index ◽

Slash Pine ◽

Pine Plantations ◽

Growth And Yield ◽

Growth Responses ◽

Diameter Increment ◽

Study Results

This study compared growth responses in planted loblolly pine (Pinustaeda L.) and slash pine (P. elliottii Engelm.) stands thinned by using three row-felling methods and at the same density levels, three selective felling methods. The study plots were in six plantations, aged 15–22 years, located in central Louisiana. Growth was measured 5 and 10 years after plot installation. Site index varied from 19.5 to 31.7 m (base age 50) and initial planting densities ranged from 1993 to 2989 trees/ha. Study results show there will likely be less diameter increment and less net basal area and cubic-metre volume per unit area growth and yield, and the growth will be in smaller-sized trees, if row thinning is used rather than selective thinning from below. These differences will probably be greater in slash pine plantations than in loblolly pine plantations.

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A Density-Management Diagram for Slash Pine Plantations in the Lower Coastal Plain

Southern Journal of Applied Forestry ◽

10.1093/sjaf/16.4.178 ◽

1992 ◽

Vol 16 (4) ◽

pp. 178-185 ◽

Cited By ~ 17

Author(s):

Thomas J. Dean ◽

Eric J. Jokela

Keyword(s):

Coastal Plain ◽

Pinus Elliottii ◽

Slash Pine ◽

Pine Plantations ◽

Growth And Yield ◽

Graphical Form ◽

Annual Increment ◽

Growing Stock ◽

Management Regimes ◽

Lower Coastal Plain

Abstract Data from 92 regional, midrotation-fertilizer trials were used to develop a density-management diagram for site-prepared slash pine (Pinus elliottii var. elliottii) plantations. The density-management diagram shows the interrelationships of five important stand variables (i.e., quadraticmean diameter (Dq), trees/ac, site height, standing volume/ac, and relative current annual increment) in a graphical form. The diagram can aid foresters in designing and comparing alternative density-management regimes for slash pine. In doing so, foresters can evaluate individualtree and stand level performances in relation to growing stock levels and make field approximations of growth and yield for various density-management regimes. Results indicated that fertilization and soil type had minimal effects on the diagram's isolines. This suggests broad applicabilityof the diagram for fertilized or unfertilized plantations found in the lower Coastal Plain. The use of the diagram is illustrated with three alternative density-management regimes, and a method is presented for estimating midrotation fertilization responses. South. J. Appl. For. 16(4):178-185

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Effect of Soil Type and Site-Preparation Method on Growth and Yield of Flatwoods Slash Pine Plantations

Southern Journal of Applied Forestry ◽

10.1093/sjaf/3.3.95 ◽

1979 ◽

Vol 3 (3) ◽

pp. 95-100 ◽

Cited By ~ 2

Author(s):

Barry D. Shiver ◽

James C. Fortson

Keyword(s):

South Carolina ◽

Soil Type ◽

Preparation Method ◽

Pinus Elliottii ◽

Site Preparation ◽

Slash Pine ◽

Pine Plantations ◽

Growth And Yield ◽

Percent Survival ◽

Lower Site

Abstract Analysis of measurements from slash pine (Pinus elliottii Engelm.) plantations in the flatwoods of Georgia, Florida, and South Carolina showed that plantations located on areas where debris had been moved (KG, bulldozed, rootraked, etc.) had significantly higher site indices than plantations located on comparable areas where debris had not been moved. Plantations located on spodic soils had significantly lower site indices than plantations located on nonspodic soils. While these differences were statistically significant, they were generally less than 2 feet at age 25. Neither volume nor percent survival was significantly affected by site-preparation classes or soils groups.

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Growth and Yield Predictions for Lower Coastal Plain Slash Pine Plantations Fertilized at Mid-Rotation

Southern Journal of Applied Forestry ◽

10.1093/sjaf/23.1.39 ◽

1999 ◽

Vol 23 (1) ◽

pp. 39-45 ◽

Cited By ~ 4

Author(s):

Stacey W. Martin ◽

Robert L. Bailey ◽

Eric J. Jokela

Keyword(s):

Basal Area ◽

Pinus Elliottii ◽

Slash Pine ◽

Pine Plantations ◽

Growth And Yield ◽

Diameter Distribution ◽

Cooperative Research ◽

Fertilization Program ◽

Permanent Sample Plots ◽

Soil Group

Abstract We present a new system of equations for slash pine plantations (Pinus elliottii Engelm. var. elliottii) that express the combined effects of CRIFF (Cooperative Research in Forest Fertilization Program) soil group and mid-rotation nitrogen (N) and phosphorus (P) fertilization on survival, basal area growth or yield, dominant height growth and the stand diameter distribution. A diameter growth model that accepts an initial diameter distribution (or tree list)provides the ability to predict future diameter distributions. Predictor variables include combinations of three mid-rotation fertilizer treatments: (1) no fertilizer; (2) N only (150 lb/ac elemental), (3) N and P (150 lb/ac and 50 lb/ac elemental, respectively) and three CRIFF soil groups: (1) B soils (e.g., Arenic Paleaquult), (2) C soils (e.g., Ultic Haplaquod), and (3) D soils (e.g., Grossarenic Haplaquod). These models derive from analyses on data taken in 243 permanent sample plots, some having been remeasured up to 6 times at 2 yr intervals, located in slash pine plantations on prepared sites. The models predict that fertilization with N and P at age 15 will result in around 30% (462 ft3/ac) more cumulative merchantable growth by age 25 for a typical site-index-60 plantation growing on CRIFF soil group B. South. J. Appl. For. 23(1):39-45.

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