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Full-Text Articles in Life Sciences

Research Report No. 2, Tree Quality, J. David Lenhart, Ellis V. Hunt Jr. Dec 1985

Research Report No. 2, Tree Quality, J. David Lenhart, Ellis V. Hunt Jr.

Informal Project Reports

One of two planted loblolly pine trees (Pinus taeda L.) and over one of three (36%) planted slash pine trees (Pinus elliottii Engelm.) on non-old-fields in East Texas have a poor quality stem. For both species, o poor quality stem is three times more likely to occur on trees with crowns in the upper canopy then in the lower canopy.


Research Report No. 3, Estimating Site Index, Jock A. Blackard Dec 1985

Research Report No. 3, Estimating Site Index, Jock A. Blackard

Informal Project Reports

Equi'.'ltions to predi ct site index (base age 25 years) for lotilolly pine (P1:1Jt1s toeo'o L.) and slE1sh pine (Pim1s elliatiii Engelrn.) pl6ntotions on non-old-fields in Eest Texfls are presented. Productivity is estimated using plantation age and avernge height of Urn ten tallest trees in the plflntotion. 1


Research Report No. 4, Predicting Individual Tree Height, Jock A. Blackard Dec 1985

Research Report No. 4, Predicting Individual Tree Height, Jock A. Blackard

Informal Project Reports

Equations to estimate individual total tree height of loblolly pine ( Pinus taeda L. ) and slash pine ( Pinus elliottii Engelm. ) trees Planted on non-old-fields in East Texas are presented.


Research Report No. 1, Fusiform Rust Occurrence, Ellis V. Hunt, J. David Lenhart Nov 1985

Research Report No. 1, Fusiform Rust Occurrence, Ellis V. Hunt, J. David Lenhart

Informal Project Reports

Fusiform rust ( Cronartium quercuum (Berk.) Miyabe ex Shirai f. sp. fusiforme) infection occurs on 57% of planted slash pine ( Pinus elliottii Engelm. ) and on 11 % of planted loblolly pine ( Pinus laeda l.) trees on non-old-fields in East Texas. Future utilization of these planted pines may be affected by the rust infection rates.


Maximizing Expected Profits In Competitive Bidding, Steven H. Bullard Jan 1985

Maximizing Expected Profits In Competitive Bidding, Steven H. Bullard

Faculty Publications

Forest products firms often buy much of their raw material through competitive bidding. The bidding process is vital to such companies, yet models are often used which merely help predict winning bids. Managers should consider expected returns from potential timber buying contracts-the product of profit and the prob· ability of realizing that profit. A general approach is summarized for maximizing expected profit in competitive bidding. For timber buying, profits are net returns minus stumpage costs. The probability of obtaining the profit is the probability a given bid will be accepted, and can be represented by a probability density function. The …


Reforestation Timing Influences After-Tax Present Value Of Costs, Steven H. Bullard Jan 1985

Reforestation Timing Influences After-Tax Present Value Of Costs, Steven H. Bullard

Faculty Publications

Public Law 96-451 provides federal income tax incentives for reforestation. Taxpayers are allowed an investment tax credit in the year reforestation costs are incurred and deductions of one-fourteenth of reforestation costs on their first tax return, one-seventh on each of their next six tax returns, and one-fourteenth on their eighth tax return. The amount amortized is 95 percent of costs if a 10-percent tax credit is claimed or 100 percent of costs if an 8- percent credit is chosen. The credit and deductions can be applied for up to $10,000 of reforestation costs each year.


Long Term Response Of Loblolly Pine To Colloidal Phosphate, M. Victor Bilan, Marcey A. Gillespie Jan 1985

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 Jan 1985

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 Jan 1985

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.


Evaluating Landowner Assistance Programs And Other Wood Procurement Options, Gary D. Kronrad, C. Franklin, J.E. De Steiquer Jan 1985

Evaluating Landowner Assistance Programs And Other Wood Procurement Options, Gary D. Kronrad, C. Franklin, J.E. De Steiquer

Faculty Publications

A major activity of forest industry is supplying their mills with wood. There are four options for wood procurement: fee land, lease land, landowner assistance programs, and open market. The task of the corporate planner is to allocate the limited budget among these options in such a way that the needed volumes of wood are procured at the least cost. A methodology has been developed to aid in this capital budget in process and has been incorporated in an easy-to-use computer program.


Business Aspects Of The Mid-South Forest Economy, Steven H. Bullard, Thomas J. Straka Jan 1985

Business Aspects Of The Mid-South Forest Economy, Steven H. Bullard, Thomas J. Straka

Faculty Publications

Timber resources and related economic activity are substantial in the Mid-South states of Tennessee Alabama Mississippi, Louisiana, and Arkansas. Most of u; are awar~ that timber is an important aspect of our regional economy. We observe many stands of timber and often see it being harvested and transported to shipping points and manuf~cturing facilities. Many, however, do not fully appreoate the absolute size of the Mid-South's forest resources, nor their relative importance to states within the region. The Mid-South forest economy is described in two sections: (1) forest resources in general and (2) timber manufacturing or processing. Value added and …


Estimating Optimal Thinning And Rotation For Mixed-Species Timber Stands Using A Random Search Algorithm, Steven H. Bullard, Hanif D. Sherali, W. David Klemperer Jan 1985

Estimating Optimal Thinning And Rotation For Mixed-Species Timber Stands Using A Random Search Algorithm, Steven H. Bullard, Hanif D. Sherali, W. David Klemperer

Faculty Publications

The problem of optimal density over time for even-aged, mixed-species stands is formulated as a nonlinear-integer programming problem with numbers of trees cut by species and diameter class as decision variables. The model is formulated using a stand-table projection growth model to predict mixed-speciesg rowth and stand-structureO. ptimal thinning and final harvest age are estimated simultaneously using heuristic random search algorithms. For sample problemsw ith two speciesr, andom searchm ethodsp rovide near-optimalc uttings trategiesw ith very little computer time or memory. Optimal solutions are estimated for problems with eight initial species/diameter class groups, projected for up to three discrete growth …


Financial Maturity Of Timber And Maximum Net Present Values, Steven H. Bullard Jan 1985

Financial Maturity Of Timber And Maximum Net Present Values, Steven H. Bullard

Faculty Publications

Simple financial maturity guidelines recommend harvesting timber when its rate of value growth becomes less than or equal to the highest rate that can be earned in other investments of equal risk. Several authors have shown that fin ancial maturity guides are consistent with maximizing economic c riteria such as net present va lue , but their results are sometimes accepted by fore sters and land managers without being fully understood. In this article , financial maturity guides are derived in a way that is easily understood, simply by maximizing the present value of all future net income.


Primer On Forestry Investment, Thomas J. Straka, Steven H. Bullard, William F. Watson Jan 1985

Primer On Forestry Investment, Thomas J. Straka, Steven H. Bullard, William F. Watson

Faculty Publications

Most forest farmers know that growing timber is a good investment. Some forest farmers, however, and many new timberland investors may not fully understand the basic ingredients that make up a forestry investment. Like other ventures, forest farming involves costs and revenues, and rates of return can be calculated. These rates can be compared with interest rates for other investments, but forest farming is not exactly like your other investments. It has special qualities.


What Is Your “Effective” Rate Of Reforestation Cost?, Steven H. Bullard, Thomas J. Straka Jan 1985

What Is Your “Effective” Rate Of Reforestation Cost?, Steven H. Bullard, Thomas J. Straka

Faculty Publications

If you are considering a reforestation investment, you should be concerned with its effective cost; ,that is, the cost of reforestation after considering interest arid timing of the tax savings and cost-share payments. Effective regeneration costs depend on your interest rate, marginal tax rate, and whether or not you receive assistance from a state or federal cost-share program.