Hardwood Eradication Improves Productivity of Thinned Loblolly Pine Stands

1984 ◽  
Vol 8 (4) ◽  
pp. 194-197 ◽  
Author(s):  
T. R. Clason
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Growth And Yield ◽  
Detectable Effect ◽  
Herbaceous Vegetation ◽  
Vegetation Control ◽  
Pine Stands ◽  
Pinus Taeda L

Abstract A single hardwood eradication treatment in a 7-year-old loblolly pine (Pinus taeda L.) stand along with pine stocking control increased growth and yield over a 10-year period. Herbaceous vegetation control had no detectable effect at ages 12 and 17. Treated plots had smaller stems, which could be controlled more readily by fire, although the number of understory stems was similar for all treatments. Mean annual radial and merchantable volume growth on treated plots surpassed controls by 30%. Future stand values were enhanced by removing hardwood competition. Residual stand sawtimber volumes on the treated plots were twice that of the control.

Thinned Loblolly Pine Stand Growth Improved by Early Hardwood Suppression

1991 ◽  
Vol 15 (1) ◽  
pp. 22-27
Author(s):  
Terry R. Clason
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Basal Area ◽  
Growth Data ◽  
Stand Growth ◽  
Pinus Taeda L

Abstract A hardwood suppression treatment applied to a 7-year-old, loblolly pine (Pinus taeda L.) plantation enhanced projected productivity through a 35-year rotation that included three commercial thinnings. By age 22, growth data showed that hardwood removal treatments had larger pines and smaller hardwoods than check treatments. Fifteen-year pine basal area and merchantable volume growth on hardwood removal plots exceeded the check plots by 25 and 27%. Projected growth between ages 22 and 35 indicated that 28 years after early hardwood removal thinned plantation merchantable volume yields improved by 840 ft³ per acre. South. J. Appl. For. 15(1):22-27.

Fertilization of Established Southern Pine Stands: Effects of Single and Split Nitrogen Treatments

1993 ◽  
Vol 17 (3) ◽  
pp. 135-138 ◽  
Author(s):  
Eric J. Jokela ◽  
Stephen C. Stearns-Smith
Keyword(s):  
Loblolly Pine ◽  
Volume Growth ◽  
Basal Area ◽  
Pinus Elliottii ◽  
Growth Responses ◽  
Southern Pine ◽  
N Application ◽  
Pine Stands ◽  
Pinus Taeda L ◽  
Nitrogen Treatments

Abstract Data from six fertilizer trials established in semimature southern pine stands (five slash pine, Pinus elliottii Engelm. var. elliottii; one loblolly pine, Pinus taeda L.) were analyzed to determine the efficacy of single vs. split fertilizer treatments. Both fertilizer treatments supplied an elemental equivalent of 200 lb nitrogen (N)/ac and 50 lb phosphorus (P)/ac; however, the first treatment was delivered as a single dose, and the second treatment was a split N application (i.e., 50 lb N and 50 lb P/ac (initial); 150 lb N/ac (2 yr later). Cumulative responses of fertilized plots were still significantly greater than the controls in five trials after 8 yr and averaged 43% (15.7 ft²/ac) and 39% (607 ft³/ac) for basal area and stand volume growth, respectively. In general, no significant differences in either the magnitude or duration of response were detected between the single and split N fertilizer treatments. This suggests that delaying a portion of the N application for 2 yr will not diminish the level of growth responses attained. Therefore, land managers have flexibility in using either application method when implementing midrotation fertilizer prescriptions. South. J. Appl. For. 17(3):135-138.

Growth of Loblolly Pine in the Arkansas Ozarks

1982 ◽  
Vol 6 (4) ◽  
pp. 215-217 ◽  
Author(s):  
G. L. Wheeler ◽  
F. M. Meade ◽  
M. W. Russell
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Diameter Growth ◽  
Pinus Taeda L ◽  
Arkansas Ozarks

Abstract A thinning and fertilizing study was established in an 11-year-old loblolly pine (Pinus taeda L.) plantation. Half of the plots were row thinned, removing 50 percent of the trees; plots were split and half were fertilized at a per acre rate of 100 pounds nitrogen, 50 pounds phosphorous and 50 pounds potassium. There was no response of height, d.b.h. or volume growth to fertilizer. Thinning increased diameter growth but decreased volume growth. The trees have shown exceptional growth. At age 17 the height was 49 feet, d.b.h. 7.3 inches and stocking 2,490 cubic feet on the thinned plots. The respective values for the unthinned plots were 48 feet, 6.7 inches, and 3,960 cubic feet.

Loblolly pine growth response to herbaceous vegetation control at different planting densities

1999 ◽  
Vol 29 (7) ◽  
pp. 960-967 ◽  
Author(s):  
Harold Quicke ◽  
Glenn Glover ◽  
Ralph S Meldahl
Keyword(s):  
Loblolly Pine ◽  
Basal Area ◽  
Planting Density ◽  
Herbaceous Vegetation ◽  
Vegetation Control ◽  
Volume Yield ◽  
Volume Response ◽  
Adjustment Term ◽  
Pinus Taeda L ◽  
Positive Effect

Growth of Pinus taeda L., with and without control of competing herbaceous vegetation, was evaluated over 15 years at planting densities ranging from 747 to 2990 trees/ha. A height response to vegetation control of 0.9 m at age 5 decreased to 0.3 m at age 15. Convergence in the cumulative height between treated and untreated stands did not translate into converging basal area and volume yield. For 1500 and 2200 trees/ha, volume response to early vegetation control increased to age 15. For 800 trees/ha volume gains increased to age 12 and were stable between ages 12 and 15. Higher densities apparently captured more of the site resources made available through vegetation control. Age-15 volume gains for 2200, 1500, and 800 trees/ha were 71 (23%), 48 (17%), and 19 m3·ha-1 (8%), respectively. A separate adjustment term in height and basal-area models captured the short-term positive effect of vegetation control on height growth and longer term basal-area responses. Previously published height and basal-area models were modified to account for planting-density effects.

scholarly journals Intensive Forest Management Affects Loblolly Pine (Pinus taeda L.) Growth and Survival on Poorly Drained Sites in Southern Arkansas

2006 ◽  
Vol 30 (2) ◽  
pp. 79-85 ◽  
Author(s):  
M.S. Rahman ◽  
M.G. Messina ◽  
R.F. Fisher
Keyword(s):  
Forest Management ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Site Preparation ◽  
Growth And Survival ◽  
Vegetation Control ◽  
Mechanical Site Preparation ◽  
Intensive Forest Management ◽  
Tree Survival ◽  
Pinus Taeda L

Abstract We investigated if intensive forest management could enhance loblolly pine seedling growth and survival on West Gulf flatwoods where winter and spring waterlogging and frequent summer drought limit loblolly pine performance. Fertilization, chemical vegetation control, and mechanical site preparation (combined bedding and ripping) were tested in different combinations on six sites established in southern Arkansas in early 1999. Loblolly pine (Pinus taeda L.) seedling performance was monitored in the first two growing seasons (1999 and 2000) and fifth growing season (2003) after planting. Fertilization increased growth in all years. Mechanical site preparation affected only height and only until year 2. There was no effect of chemical vegetation control in any measurement year, although chemical vegetation control resulted in greater growth in combination with fertilization than did either treatment applied separately. Tree survival averaged 92% a few months after planting and then decreased significantly at year 1 (77%), and remained comparable until year 5, the last year data were collected. Tree survival was not affected by mechanical site preparation, fertilization, or chemical vegetation control. Intensive forest management can increase loblolly pine seedling growth and survival on poorly drained sites in the West Gulf.

Sawtimber Volume Predictions for Uneven-Aged Loblolly-Shortleaf Pine Stands on Average Sites

1983 ◽  
Vol 7 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Paul A. Murphy ◽  
Robert M. Farrar
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Basal Area ◽  
Site Index ◽  
Selection System ◽  
Pinus Echinata ◽  
Shortleaf Pine ◽  
Elapsed Time ◽  
Pine Stands ◽  
Pinus Taeda L

Abstract Equations are given to estimate current and projected sawtimber volumes and projected basal area of the sawtimber portion of uneven-aged loblolly-shortleaf (Pinus taeda L.-Pinus echinata Mill.) pine stands managed under the selection system. The independent variables are elapsed time, initial merchantable basal area, and the initial ratio of sawtimber basal area to merchantable basal area. The results should provide guidelines for the board-foot and cubic-foot production of sawtimber-sized trees in uneven-aged stands that occur on average sites (site index 90, loblolly pine) in the Coastal Plain.

Growth of Loblolly Pine Stands After the First Five Years of Uneven-Aged Silviculture Using Single-Tree Selection

1994 ◽  
Vol 18 (3) ◽  
pp. 128-132 ◽  
Author(s):  
Paul A. Murphy ◽  
Michael G. Shelton
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Basal Area ◽  
Site Index ◽  
Single Tree ◽  
Single Tree Selection ◽  
Pinus Taeda L ◽  
North Louisiana ◽  
Positive Effect

Abstract The effects of three levels of residual basal area (40, 60, and 80 ft2/ac), maximum dbh (12, 16, and 20 in.) and site index (< 81 ft, 81 to 90 ft, and >90 ft) on the growth of loblolly pine (Pinus taeda L.) stands after 5 yr of uneven-aged silviculture were determined from plots located in south Arkansas and north Louisiana. Designated levels of basal area and maximum dbh were achieved by harvesting; a q factor of 1.2 (using 1 in. dbh classes) was imposed on all plots as closely as possible. Stand-level models were developed for annual per acre net volume growth (merchantable cubic feet, sawtimber cubic feet, and sawtimber board feet, Doyle rule) and annual per acre survivor growth, ingrowth, and mortality components of basal area growth. Growth for all volume measures increased with an increase in basal area. Site index did not significantly affect merchantable cubic-foot growth but had a positive effect on sawtimber growth in both cubic feet and board feet, Doyle. Increases in maximum dbh decreased merchantable and sawtimber cubic-foot growth but increased growth for board-foot volume, Doyle. South. J. Appl. For. 18(3): 128-132.

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

1991 ◽  
Vol 15 (1) ◽  
pp. 10-17 ◽  
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.

Thinning Young Loblolly Pine Stands With Fire

1993 ◽  
Vol 3 (3) ◽  
pp. 169 ◽  
Author(s):  
DD Wade
Keyword(s):  
Ambient Temperature ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Southeastern United States ◽  
Wide Range ◽  
Loblolly Pines ◽  
Pine Stands ◽  
Pinus Taeda L ◽  
The Relationship ◽  
Stem Girdling

The relationship between fire-caused stem girdling and groundline diameter (GLD) in loblolly pine (Pinus taeda L.) was determined. Results of 10 experimental prescribed bums conducted across a wide range of ambient temperature conditions during both the dormant and growing season demonstrate that low-intensity backing fires (< 346 KW/m) are an effective tool to eliminate loblolly pines less than 3.8 cm (1.5 in.) GLD. Wide differences in ambient temperature at time of burning did not affect stem kill of unscorched trees in this study. Virtually all fire-caused mortality took place within four months postburn. A predictive model that explained 92% of the variation in mortality was developed to facilitate the use of fire to thin young, overcrowded loblolly pine stands in the southeastern United States. Use of this model in conjunction with a preburn stand survey allows estimation of the number and distribution of survivors prior to ignition.

Sign in / Sign up

Export Citation Format

Share Document