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Full-Text Articles in Life Sciences
Influence Of Planting Density On Diameter And Height In East Texas Pine Plantations, Young Jin Lee, J. David Lenhart
Influence Of Planting Density On Diameter And Height In East Texas Pine Plantations, Young Jin Lee, J. David Lenhart
Faculty Publications
The response of diameter and height of unthinned planted stands ofloblolly (Pinus taeda L.) and slash (Pinus elliottii Eng elm.)pine in East Texas to different classes of planting densities were analyzed. After tracking the development ofdiameterand heightfor 15yron a setofpennanentplots representing a broad range of plantation parameters, average diameter and average height trends were observed. For both species, average diameter values were significantly larger with lower planting densities. 1n contrast, average height growth is insensitive to planting density at younger age classes for loblolly and at older age classes for slash pine plantations.
Population Dynamics, Impacts, And Integrated Management Of Forest Defoliating Insects, David Kulhavy, W. G. Ross, R. R. Cahal
Population Dynamics, Impacts, And Integrated Management Of Forest Defoliating Insects, David Kulhavy, W. G. Ross, R. R. Cahal
Faculty Publications
Pine plantations on Typic Quartzipsamments in East Texas are difficult to establish. Forest management options following clearcutting are limited. An 8-year regeneration study of the growth and survival of loblolly, Pinus taeda, L. shortleaf, P. echinata Mill., slash, P. elliotii Engelm and longleaf pines P. palustris Mill. was conducted to determine optimum tree species and treatments for reforestation, and to recommend practical alternative land uses and management strategies for Typic Quartzipsamments. Successful regeneration provides new opportunities for insects and pathogens. Impacts of the Nantucket pine tip moth, R}iyacionia frustrana (Comstock), the Deodar weevil, Pissodes nemorensis, Germar, Annosus root rot, Heterobasidion …
Impacts Of Three Timber Stand Improvement Thinning Options On Low Quality Southern Mixed-Hardwood Stands, Brian P. Oswald, Thomas H. Green
Impacts Of Three Timber Stand Improvement Thinning Options On Low Quality Southern Mixed-Hardwood Stands, Brian P. Oswald, Thomas H. Green
Faculty Publications
The impact of three thinning options (strip, single-tree selection, and strip with selection between strips) on lowquality southern mixed-hardwood stands was evaluated in northern Alabama. Although stand level comparisons showed no significant differences between options, individual dominant trees benefitted from the thinning treatments, exhibiting increased basal area growth during the period of the study. Intermediate treatments such as these thinning options may provide landowners with sufficient growth of selected high-quality trees to warrant the more intensive management activities on similar sites as utilized in this study.
Initial Investigation Of Height-Diameter Relationships Of Dominant Trees In The Mixed Hardwood Bottomland Forests Of East Texas, Brian P. Oswald, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Initial Investigation Of Height-Diameter Relationships Of Dominant Trees In The Mixed Hardwood Bottomland Forests Of East Texas, Brian P. Oswald, A. Gordon Holley, Leslie A. Dale, Gary D. Kronrad
Faculty Publications
Three to five dominant trees from each of 445 ten-factor variable radius inventory points were utilized to evaluate the height- diameter relationships of 13 species or genera found on bottomland hardwood sites throughout east Texas. Regression analysis was performed using the linear model such that height = (30 + (31 x (d.b.h.). The species were placed into six groups: (1) pines (Pinus taeda and P. enchinata) ; (2) water oak/willow oak/white oak/swamp chestnut oak (Quercus nigra)/(Q. phe//os)/(Q. alba)/(Q. michauxi1) ; (3) blackgum/laurel oak/overcup oak (Nyssa sylvatica)/(Q. laurifolia)/(Q. lyrata); (4) ash/maple (Fraxinus spp.)/(Acerspp.); (5) hickories (Carya spp.), and (6) elms (Ulmus …
First-Year Survival And Growth Of Bareroot, Container, And Direct-Seeded Nuttall Oak Planted On Flood-Prone Agricultural Fields, Hans Michael Williams, Monica N. Craft
First-Year Survival And Growth Of Bareroot, Container, And Direct-Seeded Nuttall Oak Planted On Flood-Prone Agricultural Fields, Hans Michael Williams, Monica N. Craft
Faculty Publications
Container and 1-0 bare root Nuttall oak ( Quercus nuttallii, Palmer) seedlings were hand-planted, and acorns were direct- seeded, in a Sharkey soil (very fine, montmorillonitic, nonacid, thermic, Vertie Haplaquepts). The seedlings and seed were planted in January, February, March, and June, 1993. Flooding, to a depth of 2 meters, occurred on the study site from late March to late May. Seedlings planted in June were not flooded. Regardless of planting date, mean first-year survival for container seedlings was greater than 80 percent. Overall mean survival for bareroot seedlings was about 40 percent and direct-seeding survival was 30 percent. Bareroot …
Effects Of Stock Type And Fall Fertilization On Survival Of Longleaf Pine Seedlings Planted In Lignite Minespoil, Mary Anne Mcguire, Hans Michael Williams
Effects Of Stock Type And Fall Fertilization On Survival Of Longleaf Pine Seedlings Planted In Lignite Minespoil, Mary Anne Mcguire, Hans Michael Williams
Faculty Publications
One-year-old longleaf pine (Pinus palustris Mill.) seedlings were hand-planted in January 1996 on an east Texas minespoil site. Effects of two seedling stock types and four levels of preplanting fall fertilization on seedling survival were evaluated. Fertilizer treatments consisting of a single application of ammonium nitrate (73 kilograms per hectare N), phosphorus (81 kilograms per hectare P), diammonium phosphate (73 kilograms per hectare N, 81 kilograms per hectare P), or control (no fertilizer) were applied to bare-root and container seedlings in November 1995. Root growth potential, the ability of a seedling to initiate and elongate new roots when placed into …
Red-Cockaded Woodpecker Nest-Cavity Selection: Relationships With Cavity Age And Resin Production, Richard N. Conner, Daniel Saenz, D. Craig Rudolph, W. G. Ross, David Kulhavy
Red-Cockaded Woodpecker Nest-Cavity Selection: Relationships With Cavity Age And Resin Production, Richard N. Conner, Daniel Saenz, D. Craig Rudolph, W. G. Ross, David Kulhavy
Faculty Publications
ABSTRACT.--We evaluated selection of nest sites by male Red-cockaded Woodpeckers (Picoides borealis) in Texas relative to the age of the cavity when only cavities excavated by the woodpecker were available and when both naturally excavated cavities and artificial cavities we available. We also evaluated nest-cavity selection relative to he ability of naturally excavated cavity trees to produce resin, which is used by the woodpeckers to maintain a barrier against predation by rat snakes (Elaphe spp.), Longleaf pines (Pinus palustris) selected by breeding males as nest trees produced significantly greater resin yields at 2, 8, and 24 h post-wounding than cavity …
Urban Idealism Versus Wilderness Realism, Paul Risk
Urban Idealism Versus Wilderness Realism, Paul Risk
Faculty Publications
No abstract provided.
Wilderness In Eastern North America: Research, Management And Planning, David L. Kulhavy, Michael Legg, John H. Burde
Wilderness In Eastern North America: Research, Management And Planning, David L. Kulhavy, Michael Legg, John H. Burde
Faculty Publications
No abstract provided.
Higher Prices And Shorter Rotations: Good News For Pine Plantation Investors, But . . ., Steven H. Bullard, Bob Daniels
Higher Prices And Shorter Rotations: Good News For Pine Plantation Investors, But . . ., Steven H. Bullard, Bob Daniels
Faculty Publications
Southern pine markets have changed dramatically in recent years. Our focus here is the changing forest economy, new price expectations, and new technologies for growing and utilizing pines. The major changes in southern pine markets are good news for forest landowners concerned with timber production-higher prices are increasing pine plantation returns, rotation lengths are decreasing, and the value of land in pine production is increasing.