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Full-Text Articles in Life Sciences
Modeling Early Responses Of Loblolly Pine Growth To Thinning In The Western Gulf Coastal Plain Region, Yuhi Weng, J. Grogan, Dean W. Coble
Modeling Early Responses Of Loblolly Pine Growth To Thinning In The Western Gulf Coastal Plain Region, Yuhi Weng, J. Grogan, Dean W. Coble
Faculty Publications
Growth response to thinning has long been a research topic of interest in forest science. This study presents the first 3–4 years of response of loblolly pine (Pinus taeda L.) growth to thinning at different intensities. Data were collected from the East Texas Pine Research Project’s region-wide loblolly pine thinning study, which covers a wide variety of stand conditions. Four treatments, light, moderate, and heavy thinning, respectively having 370, 555, and 740 residual trees per hectare after thinning, and an unthinned control, were included. Individual tree diameter at breast height (dbh) and total height were recorded annually for the …
Vegetative Comunitiy Development Over 30 Years Within Pine Plantations On Reclaimed Mine Land In East Texas., Christy Christian, Brian P. Oswald, Hans M. Williams, Kenneth W. Farrish
Vegetative Comunitiy Development Over 30 Years Within Pine Plantations On Reclaimed Mine Land In East Texas., Christy Christian, Brian P. Oswald, Hans M. Williams, Kenneth W. Farrish
Faculty Publications
No abstract provided.
A Comparison Of Tree Growth In Loblolly Pine (Pinus Taeda) Plantations And Silvopasture Settings In East Texas, B. P. Oswald, Y. Weng, K. W. Farrish, J. Grogan, W. Kruckeberg, T. Barton
A Comparison Of Tree Growth In Loblolly Pine (Pinus Taeda) Plantations And Silvopasture Settings In East Texas, B. P. Oswald, Y. Weng, K. W. Farrish, J. Grogan, W. Kruckeberg, T. Barton
Faculty Publications
A desire by landowners to diversify potential income sources has resulted in an increased interest in silvopasture. This intensive land management option allows for the production of timber, livestock and/or forage on the same land base. With traditional plantation systems featuring loblolly pine (Pinus taeda) common in the western gulf coast region of the southeastern United States, comparisons of tree growth are needed to justify the use of silvopasture. This study evaluated the height, diameter and volume growth 13 years post-establishment of loblolly pine in both silvopasture and plantation spacings on a single site in east Texas. Individual trees in …
Split-Season Herbaceous Weed Control For Full-Season Seedling Performance, Jimmie L. Yeiser, Andrew W. Ezell
Split-Season Herbaceous Weed Control For Full-Season Seedling Performance, Jimmie L. Yeiser, Andrew W. Ezell
Faculty Publications
Results from four loblolly pine (Pinus taeda L.) sites, one in each of MS and TX in 2001 and again in 2002, are presented. Twelve herbicide treatments and an untreated check were tested. Herbicide treatments were applied early (mid- March), late (mid-May), both timings, or not at all to achieve, early- late-, full-season, or no weed control. When averaged across all four sites and compared to the early treatment, bare ground was less from April through July and April through November on late treated and untreated plots, respectively. Full-season weed control provided numerically more bare ground than other treatments. When …
Effects Of Sower Type And Seedbed Density On Bareroot Seedling Morphology And Early Field Performance Of An East Texas Family Of Loblolly Pine, Hans Michael Williams, Tim Stewart
Effects Of Sower Type And Seedbed Density On Bareroot Seedling Morphology And Early Field Performance Of An East Texas Family Of Loblolly Pine, Hans Michael Williams, Tim Stewart
Faculty Publications
Precision sowing is commonly used at forest tree nurseries in order to improve the growing space uniformity of seedlings in the beds. Temple-Inland Forest Products Corporation recently purchased a vacuum sower and requested a study be conducted comparing their new sower with a drill sower on the morphological characteristics of loblolly pine (Pinus taeda L.) at lifting. The study was conducted in 2000 and repeated in 2001. The seed were sown using the two sower types to achieve four densities of 161 , 215, 269, and 323 seedlings/m2• Two half-sibling families were tested in 2000, and one halfsibling family was …
The Response Of Bareroot Loblolly Pine Seedlings To The Amount And Timing Of Nitrogen Fertilization In The Nursery, Hans Michael Williams, Karen Woodard, Tim Stewart
The Response Of Bareroot Loblolly Pine Seedlings To The Amount And Timing Of Nitrogen Fertilization In The Nursery, Hans Michael Williams, Karen Woodard, Tim Stewart
Faculty Publications
A nursery study was conducted to observe the effects of altering the amount of nitrogen fertilizer at each application on bareroot loblolly pine (Pinus taeda L.) seedling morphology, survival and growth. The treatments were an equal amount of fertilizer applied each time, an increasing amount each time, and a schedule characterized by low amounts, high amounts, and low amounts. Six applications of ammonium nitrate (32.5 percent N) were applied between June and August 2000, and for all treatments, a total of 169 kg N per ha was applied. In addition, for each growing season treatment, the seedlings were treated either …
Growth Response From Herbicide, Prescribed Fire And Fertilizer Treatments In Midrotational Loblolly Pine: First-Year Results, Mary Michelle Barnett, Sandra Rideout, Brian P. Oswald, Kenneth W. Farrish, Hans Michael Williams
Growth Response From Herbicide, Prescribed Fire And Fertilizer Treatments In Midrotational Loblolly Pine: First-Year Results, Mary Michelle Barnett, Sandra Rideout, Brian P. Oswald, Kenneth W. Farrish, Hans Michael Williams
Faculty Publications
This study was initiated to determine growth response resulting from the application of prescribed fire and herbicide, with and without fertilizatio.n. In. southeast Texas, herbicide, prescribed fire and fertilizer treatments were applied in m1d:rotat1onal loblolly pine plantations 1.5 years after thinning. Five replications were established at. each of two study sites located on similar soils, aspects and slopes. Half of each replication. was randomly selected and fertilized. Eight treatment plots were established 1n e~ch replication with one of each of the four treatments of control, herbicide, fire, and herb1c1de/flre randomly applied to fertilized plots and one of each of the …
A Survival Model For Unthinned Loblolly Pine Plantations That Incorporates Non-Planted Tree Competition, Site Quality, And Incidence Of Fusiform Rust, Dean W. Coble, Young-Jin Lee
A Survival Model For Unthinned Loblolly Pine Plantations That Incorporates Non-Planted Tree Competition, Site Quality, And Incidence Of Fusiform Rust, Dean W. Coble, Young-Jin Lee
Faculty Publications
Future biomass yields are functionally related to the number of trees surviving at a given age. A stand level survival model was developed that incorporates competition of non-planted trees, site quality, and the incidence of fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme). The model consists of a system of two equations, one of which represents the number of surviving trees infected by fusiform rust while the other represents the number of trees not infected by fusiform rust. Data from unthinned loblolly pine (Pinus taeda L.) plantations in East Texas were used to fit …
Financial Analysis Of Pruning Combined With Low Density Management Of Southern Yellow Pine In East Texas: An Assessment, Jayson F. Tate, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Financial Analysis Of Pruning Combined With Low Density Management Of Southern Yellow Pine In East Texas: An Assessment, Jayson F. Tate, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Faculty Publications
Time study was conducted on pruning of research plots in a IZyear-old loblolly pine (Pinus taeda) plantation thinned to 58 square feet basal area (190 trees) per acre. Pruning times with labor and equipment costs were used to determine per acre and per tree pruning costs. Pruning costs were used to find values necessary to break-even on a pruning investment. Soil expectation value (SEV) calculations were used to compare profitability of management utilizing heavy thinning with pruning to traditional management regimes. Calculations were performed using a current hourly wage of $8.00, stumpage price of $400.00, per thousand board feet (MBF) …
Four-Year Growth Results From 16 Year Old Intensively Managed Low Density Loblolly Pine Plantations, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Four-Year Growth Results From 16 Year Old Intensively Managed Low Density Loblolly Pine Plantations, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Faculty Publications
In 1994 eighty four permanent research plots were established in two twelve year-old loblolly pine (Pinus taeda) plantations in East Texas. Plots differed in relation to: soil-site type, density of trees per acre, fertilization treatments, and competing vegetation control. Three levels of thinning treatments reduced the basal areas to 36,60, and 84 square feet of basal area (approximately 100,200, and 300 stems, respectively) per acre. All residual trees were pruned to a height of 25 feet. Plots were re-measured in 1995, 1996, and 1998. Significant differences in diameter and height growth rates were detected in 1996 and 1998. Average diameter …
Herbicide And Fertilizer Combinations For Newly Planted Loblolly Pine Seedlings On A Flatwoods Site In Southeastern Arkansas: Year Three Results, Jimmie L. Yeiser
Herbicide And Fertilizer Combinations For Newly Planted Loblolly Pine Seedlings On A Flatwoods Site In Southeastern Arkansas: Year Three Results, Jimmie L. Yeiser
Faculty Publications
Herbicide and fertilizer combinations were tested for enhanced loblolly pine (Pinus taeda L.) seedling performance on a chemically prepared, flatwoods site in southeastern AR. Fertilizer treatments were selected combinations of 40,50, and 50 pounds per acre of elemental N, P, or K, respectively. Arsenal+Oust (4 ounces+2 ounces per treated acre) was applied for herbaceous weed control (HWC). One treatment of herbicide or herbicide+ fertilizer was applied per year; the same rate was used for years one (1996) and two (1997). After three growing seasons, the greatest seedling volume resulted from two treatments of HWC+NPK fertilizer. Two treatments of HWC alone …
Evaluating Susceptibility Of Red-Cockaded Woodpecker Cavity Trees To Southern Pine Beetle In Texas, William G. Ross, David Kulhavy, Richard N. Conner
Evaluating Susceptibility Of Red-Cockaded Woodpecker Cavity Trees To Southern Pine Beetle In Texas, William G. Ross, David Kulhavy, Richard N. Conner
Faculty Publications
Characteristics of loblolly (Pinus fuedu L.) and shortleaf (Pinus echinutu Mill.) pine trees favored by the endangered red-cockaded woodpecker, Picuides borealis (Vieillot) for nesting and roosting cavities over much of eastern Texas, tend to make these trees highly vulnerable to mortality from bark beetle attack. Resin flow and xylem moisture potential, often used as indicators of pine susceptibility to bark beetle mortality, were measured in several red-cockaded woodpecker cavity tree clusters in the Angelina and Davy Crockett National Forests. No differences in xylem moisture potential were found, while resin flow varied by site, tree species, and cavity tree type. With …
Soil Properties Relating To Height Growth Of Loblolly Pine On Four Major Soil Series In East Texas, R. Larry Willett, M. Victor Bilan
Soil Properties Relating To Height Growth Of Loblolly Pine On Four Major Soil Series In East Texas, R. Larry Willett, M. Victor Bilan
Faculty Publications
Stem analysis was used to obtain age and height data for loblolly pine (Pinus taeda L.) stands growing on Bowie, Fuquay, Sacul, and TroupxlsTnortheastern Texas. The soil profiles were described and bulk soil samples were taken in each sample stand. Selected physical and chemical soil properties were measured for each soil horizon. Stepwise regression analysis was used to correlate average stand height at ages 5, 10, 20, and 30 years with soil properties. Strong associations were found between stand height and properties which relate to available soil moisture holding capacity, soil permeability, and soil aeration. For Bowie, Fww , and …
Site/Stand Factors Influencing Nantucket Pine Tip Moth In Loblolly Pine Plantations, David Kulhavy, W. G. Ross, James R. Meeker, W. David Tracey
Site/Stand Factors Influencing Nantucket Pine Tip Moth In Loblolly Pine Plantations, David Kulhavy, W. G. Ross, James R. Meeker, W. David Tracey
Faculty Publications
Tip moth infestation and loblolly pine growth were examined on sandy, loamy and clayey sites in 2-3 year old plantations. Infestations were greatest on loamy sites. Following fertilizer and herbicide applications, tip moth infestations were lowest on fertilized plots following application of phosphorus.
Management And Pest Management Considerations On Droughty Soils: Four Year Results, David Kulhavy, Kenneth G. Watterson, James Kroll, James R. Meeker
Management And Pest Management Considerations On Droughty Soils: Four Year Results, David Kulhavy, Kenneth G. Watterson, James Kroll, James R. Meeker
Faculty Publications
Four year survival of pines on droughty (Typic Quartzips~mments) soils was best for longleaf pine and Terr-Sorb -treated loblolly pine. Pest considerations include town ants and Nantucket pine tip moths on loblolly pine. Untreated loblolly pine had reduced leader and total height growth anH increased tip moth infestations, compared to Terra-Sorb and clay-slurry treated loblolly pine. Soil texture averaged less than eight percent silt and clay combined in the treatment areas.
Long Term Response Of Loblolly Pine To Colloidal Phosphate, M. Victor Bilan, Marcey A. Gillespie
Long Term Response Of Loblolly Pine To Colloidal Phosphate, M. Victor Bilan, Marcey A. Gillespie
Faculty Publications
Three or six ounces of colloidal phosphate were applied either in planting hole or on soil surface while planting loblolly pine in East Texas. Combination of phosphate in the planting hole with NK on soil surface increased diameter growth for four years and the height growth for 18 years after planting.
Survival Of Pines On Droughty Soils: Two-Year Results, James Kroll, William C. Deauman, C. Darwin Foster, David Kulhavy, W. David Tracey
Survival Of Pines On Droughty Soils: Two-Year Results, James Kroll, William C. Deauman, C. Darwin Foster, David Kulhavy, W. David Tracey
Faculty Publications
Three species of pines (loblolly, slash and longleaf) were planted with four treatments (loblolly and slash = bareroot, clay dip slurry and TerrasorH ; longleaf = containerized) to test survival on droughty, typic quartzipsamments soils. At the end of the first season, survival~s significantly better for the containerized longleaf and Terrasoro treated loblolly pine (81 and 85%) followed by untreaRed loblolly pine (51%), clay-treated loblolly (50%), then Terrasorb treated slash (48%), untreated slash (41%) and clay-treated slash (36%). At the e~of the second growing season, longleaf had 56% survival, Terrasor~ treated loblolly (51%), clay-dip slurry loblolly (31.9%), Terrasoro treated slash …
Establishment Of Permanent Growth And Yield Plots In Loblolly And Slash Pine Plantations, J. David Lenhart, Ellis V. Hunt Jr., Jock A. Blackard
Establishment Of Permanent Growth And Yield Plots In Loblolly And Slash Pine Plantations, J. David Lenhart, Ellis V. Hunt Jr., Jock A. Blackard
Faculty Publications
Permanent plots have been established in 178 loblolly and 78 slash pine plantations throughout East Texas to study the development of stand structure over time. Analysis of the data will provide methods of estimating growth and yield, mortality, and site productivity to assist managers of these plantations.