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Articles 2491 - 2520 of 2619

Full-Text Articles in Life Sciences

Effect Of Time And Depth Of Planting On Survival And Growth Of Loblolly Pine (Pinus Taeda L.) Seedlings In Texas, M. Victor Bilan Jan 1987

Effect Of Time And Depth Of Planting On Survival And Growth Of Loblolly Pine (Pinus Taeda L.) Seedlings In Texas, M. Victor Bilan

Faculty Publications

Loblolly pine seedlings were lifted from a nursery bed in two-week intervals (November 4-April 21) and were immediately planted in an open field. Each planting included seedlings planted at the root collar (A), one-half of shoot buried (B) and most of the shoot buried except for the one-inch terminal (C). Average mortality during the first year was 10%, 13% and 16% for the A, B and C planting depths, respectively; the corresponding values for the second year mortality were 2%, 3% and 5%. Average first year mortality by the planting periods ranged - 24% with the highest values for April …

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Management And Pest Management Considerations On Droughty Soils: Four Year Results, David Kulhavy, Kenneth G. Watterson, James Kroll, James R. Meeker Jan 1987

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.

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Estimating The Amount Of Wood Per Acre In Loblolly And Slash Pine Plantations In East Texas, J. David Lenhart Jan 1987

Estimating The Amount Of Wood Per Acre In Loblolly And Slash Pine Plantations In East Texas, J. David Lenhart

Faculty Publications

Two diameter distribution yield prediction systems are presented for loblolly pine (Pinus taeda L.) and slash pine (Pinus elliotti Engelm.) plantations located on non-old-fields in East Texas. A separate system was developed for each species based on the initial measurement of the East Texas Pine Plantation Research Project permanent plots.

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Forest Insect Hazard Rating, Ray R. Hicks Jr., Jack E. Coster, G.N. Mason Jan 1987

Forest Insect Hazard Rating, Ray R. Hicks Jr., Jack E. Coster, G.N. Mason

Faculty Publications

No abstract provided.

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Bugs! Bugs! Bugs!-Interpreting Insects For Children, David Kulhavy Jan 1987

Bugs! Bugs! Bugs!-Interpreting Insects For Children, David Kulhavy

Faculty Publications

No abstract provided.

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Basic Mathematical Programming Applications To Weed Control In Forestry, Steven H. Bullard, R. H. Richardson, Thomas J. Straka Jan 1987

Basic Mathematical Programming Applications To Weed Control In Forestry, Steven H. Bullard, R. H. Richardson, Thomas J. Straka

Faculty Publications

Many studies document herbicide performance for Heed and hardwood control in forestry. Few studies, hoHever, attemp t to develop optima l application strategies. Stand-level optindzation is presently limited due to lack of groHth and yield information. Forest-level optimization is possible, however, and has great potential to aid in planning forestry weed control prog rams.

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State Cost-Share Programs For Nonindustrial Private Forestry Investments, Thomas J. Straka, Steven H. Bullard Jan 1987

State Cost-Share Programs For Nonindustrial Private Forestry Investments, Thomas J. Straka, Steven H. Bullard

Faculty Publications

Fourteen states provide cost-share assistance for approved forestry practices. Host programs are intended to increase forest productivity. Funding is typically from state appropriations and/or taxes on primary forest products. Cost-share rates range up to 80 percent, but most programs are at the 50 percent level. All programs require an approved forest management program. Eligible practices are generally reforestation, site preparation, and timber stand improvement.

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Costs And Cost Trends For Forestry Practices In The South, William F. Watson, Thomas J. Straka, Steven H. Bullard Jan 1987

Costs And Cost Trends For Forestry Practices In The South, William F. Watson, Thomas J. Straka, Steven H. Bullard

Faculty Publications

Cost estimates of practicing forestry in the South during 1986 and cost changes during the 1952-1986 period are presented in this report. Albert C. Worrell reported the original cost study in Forest Farmer in May 1953. His work was updated by James G. Yoho and Robert B. Fish in the November 1961 issue of Forest Farmer. Other revisions include James G. Yoho, George F . Dutrow, and James Moak (Forest Farmer, 1971); James Moak and Jim Kucera (Forest Farmer, 1975); James Moak, James Kucera, and W.F. Watson (Forest Farmer Manual, 1977); James Moak, W.F. Watson, and Paul Van Deusen (Forest …

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Sequence Alignment With Matched Sections, Jerrold R. Griggs, Philip J. Hanlon, Michael S. Waterman Oct 1986

Sequence Alignment With Matched Sections, Jerrold R. Griggs, Philip J. Hanlon, Michael S. Waterman

Faculty Publications

In molecular biology, two finite sequences are compared by displaying one sequence written over another in an alignment. The number of alignments of two sequences is related to the Stanton-Cowan numbers. This paper gives asymptotics for the number of alignments of two sequences of length n with matching sections of size at least b.

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The Effect Of Salt Concentration On Auxin Stability In Culture Media, James R. Dunlap, Stephen Kresovich, Robert E. Mcgee Jul 1986

The Effect Of Salt Concentration On Auxin Stability In Culture Media, James R. Dunlap, Stephen Kresovich, Robert E. Mcgee

Faculty Publications

The concentrations of indole-3-acetic acid (IAA), naphthaleneacetic acid (NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D) were followed for 35 days in cell-free liquid medium containing 100, 50, or 0% Murashige-Skoog (MS) salt base. Although the concentrations of NAA or 2,4-D remained constant the level of IAA decreased to only 11% of the original concentration after 35 days in the presence of 100% MS salt base. The observed rate of IAA degradation was accelerated by the presence of MS salts.

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Quantifying Spatial Patterns Of Overgrowth In Epibenthic Communities, David S. Wethey, Linda J. Walters Mar 1986

Quantifying Spatial Patterns Of Overgrowth In Epibenthic Communities, David S. Wethey, Linda J. Walters

Faculty Publications

A method is presented that allows rapid and accurate measurement of changes in the spatial pattern of space occupation in encrusting organisms. The boundaries of organisms are represented as polygons, and geometric difference calculations are used to establish the perimeters of the areas gained or vacated between sampling dates. The influence of interspecific interactions on occupation of space is also quantified: geometric intersection calculations are used to define the perimeters of the areas gained or lost in overgrowth interactions. A method is presented for estimating the sampling frequency necessary for detection of significant changes in occupation of space. The method …

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The Msu Student Chapter, Society Of American Foresters, Steven H. Bullard Jan 1986

The Msu Student Chapter, Society Of American Foresters, Steven H. Bullard

Faculty Publications

Forestry students at Mississippi State are encouraged to participate in organizations that strengthen their sense of professionalism and point them toward continued development after graduation. The Student Chapter of the Society of American Foresters is one of those organizations. Forestry students who take part in its activities are aided in developing communication and leadership skills that are difficult to learn in a classroom. Forestry is not just trees. Forestry students deal with the biology of the forest and the economics of timber. They learn how to use these tools to achieve a forest landowner's objectives. Foresters not only make decisions-they …

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Fusiform Rust Trends In East Texas, Ellis V. Hunt Jr., J. David Lenhart Jan 1986

Fusiform Rust Trends In East Texas, Ellis V. Hunt Jr., J. David Lenhart

Faculty Publications

Four surveys of pine plantations in East Texas between 1969 and 1984 indicate that fusiform rust (Cronartium quercuum (Berk.) Miyabe ex Shirai f. sp. fusiforme) infection rates are increasing on slash pine (Pinus elliottii Engelm. var. elliottii) and either decreasing or about constant on loblolly pine (Pinus taeda L.). Currently, stem infections occur on about 1 in 2 slash pines and 1 in 14 loblolly pines. South. J. Appl. For. 10:215-216, Nov. 1986.

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Limnological Aspects Of Upland Island: A Wilderness Area In East Texas, J. A. Sidnell, C W. Reed, J. D. Mccullough Jan 1986

Limnological Aspects Of Upland Island: A Wilderness Area In East Texas, J. A. Sidnell, C W. Reed, J. D. Mccullough

Faculty Publications

No abstract provided.

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Management Of Plant Communities In Wilderness Areas, J. D. Mccullough Jan 1986

Management Of Plant Communities In Wilderness Areas, J. D. Mccullough

Faculty Publications

No abstract provided.

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Floristic Composition And Management Of East Texas Pitcher Plant Bogs, E. S. Nixon, J. R. Ward Jan 1986

Floristic Composition And Management Of East Texas Pitcher Plant Bogs, E. S. Nixon, J. R. Ward

Faculty Publications

No abstract provided.

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It Pays To Know How Your Timber Will Be Valued, William F. Watson, Steven H. Bullard, Thomas J. Straka Jan 1986

It Pays To Know How Your Timber Will Be Valued, William F. Watson, Steven H. Bullard, Thomas J. Straka

Faculty Publications

You as a forest farmer can usually realize income from your timber investment in two ways. You can rent timberland for nontimber uses (usually hunting) , or you can lease or sell your interest in the timber. In most cases, greater returns result from selling timber outright.

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External Factors Shaping The 2010 Forester: Continuing Education From An Academic Point Of View, Thomas J. Straka, Steven H. Bullard Jan 1986

External Factors Shaping The 2010 Forester: Continuing Education From An Academic Point Of View, Thomas J. Straka, Steven H. Bullard

Faculty Publications

Professional obsolescence is a danger facing all foresters. All too many foreste·rs consider their educational commitment to terminate when they earn their degree. The competency of the professional forester can quickly erode if the forester does not develop a personal continuing education program.

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Economic Appraisal Of Service Forester Activities In Mississippi, Thomas J. Straka, Walter C. Anderson, Steven H. Bullard Jan 1986

Economic Appraisal Of Service Forester Activities In Mississippi, Thomas J. Straka, Walter C. Anderson, Steven H. Bullard

Faculty Publications

The importance of nonindustrial private forest( NIPF) lands to national timber output potential is well-documented (USDA Forest Service 1981, 1982; Wall 1981). The NIPF sector controls 58 percent of the Nation's commercial fm·est area, compared to 14- percent in forest industry holdings, and 28 percent in public forests (Figure 1). Approximately 71 percent of the commercial forest area in the eastern United States is held by the NIPF sector.

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Role Of Company Sales In Funding Research And Development By Major U.S. Paper Companies, Steven H. Bullard, Thomas J. Straka Jan 1986

Role Of Company Sales In Funding Research And Development By Major U.S. Paper Companies, Steven H. Bullard, Thomas J. Straka

Faculty Publications

Forestry research is conducted by state and federal agencies and by many private firms. Studies of research productivity and efficiency are increasingly common in forestry, due to the greater scale of research activity, and increasing competition for both public and private funds. Research evaluations rely on accurate measures of research inputs and outputs. This article presents an equation to predict research inputs for five major firms in the U.S. pulp and paper industry. Pulp and paper research by major U.S. companies is very closely related to corporate sales each year. The relationship empirically supports important assumptions that have been used …

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Continuing Education Needs Of Natural Resource Professionals, Steven H. Bullard, Thomas J. Straka Jan 1986

Continuing Education Needs Of Natural Resource Professionals, Steven H. Bullard, Thomas J. Straka

Faculty Publications

New products, technology and changing social attitudes have created continuing education needs in many natural resource-related professions. Environmental educations rapidly become obsolete without continued study, and many professional organizations are addressing this problem. Causes of professional obsolescence· are briefly reviewed with emphasis on natural resource managers. Foresters' needs and continuing education efforts are discussed to illustrate continuing education concepts in an environmental and natural resource-related profession.

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Potential Reasons For Publicly Funded Forestry Research, Steven H. Bullard Jan 1986

Potential Reasons For Publicly Funded Forestry Research, Steven H. Bullard

Faculty Publications

The general rationale for public support of research and specific reasons for support of particular research areas are of potential concern to many people. Those directly concerned with research ·funding and its rationale, for example, range from legislators to research administrators, scientists and graduate students. Public support of specific research areas is often defended for socio~polit~ ical and economic reasons. As an example, although private-sector research in forestry is conducted by large, diversified firms, the benefits of even highly applied research can be difficult to capture. Public support is necessary in such cases, since social benefits exceed the benefits considered …

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Rates Of Return On Silvicultural Practices, Steven H. Bullard, Bobb L. Karr Jan 1986

Rates Of Return On Silvicultural Practices, Steven H. Bullard, Bobb L. Karr

Faculty Publications

Anticipated rates of return can help landowners and forest managers evaluate hardwood control and many other stand treatments. A simple microcomputer model is discussed which displays rates of return for specific stand treatment conditions. The program can be used before or after taxes and with or without inflation. The model displays rates of return for ranges of silvicultural treatment costs and expected harvest value increases, thus providing information for evaluating treatments where growth responses or future prices are difficult to estimate.

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Wilderness And Natural Areas In The Eastern United States: A Management Challenge, David Kulhavy, Richard N. Conner Jan 1986

Wilderness And Natural Areas In The Eastern United States: A Management Challenge, David Kulhavy, Richard N. Conner

Faculty Publications

"The purpose of this symposium is not to debate either the concept of wilderness or the amount of wilderness appropriate for the United States. These are not debatable issues for present purposes. The Congress has spoken twice. The Wilderness Act of 1964 (PL 88-577) and the amendments of 1975, known as the "Eastern Wilderness Act" (PL 93-622), both set-aside existing areas as wilderness and established procedures for consideration of additions to the wilderness system. The purpose of this symposium is to consider the management of wilderness areas over time. In a very real sense, if those areas established as wilderness …

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An Introduction To Wilderness And Natural Area Management, David Kulhavy, D. B. Drummond Jan 1986

An Introduction To Wilderness And Natural Area Management, David Kulhavy, D. B. Drummond

Faculty Publications

No abstract provided.

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Forest Protection, David Kulhavy, D. B. Drummond Jan 1986

Forest Protection, David Kulhavy, D. B. Drummond

Faculty Publications

No abstract provided.

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Visitor Needs And User Impact, H. K. Cordell, M H. Legg, K. E. Cathey Jan 1986

Visitor Needs And User Impact, H. K. Cordell, M H. Legg, K. E. Cathey

Faculty Publications

No abstract provided.

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Optional Forest Yield Taxes, Gary D. Kronrad, C. Hickman Jan 1986

Optional Forest Yield Taxes, Gary D. Kronrad, C. Hickman

Faculty Publications

No abstract provided.

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Site Index Equations For Loblolly And Slash Pine Plantations On Non-Old Fields In East Texas, J. David Lenhart, Ellis V. Hunt Jr., Jock A. Blackard Jan 1986

Site Index Equations For Loblolly And Slash Pine Plantations On Non-Old Fields In East Texas, J. David Lenhart, Ellis V. Hunt Jr., Jock A. Blackard

Faculty Publications

Equations to estimate site index (index age 25 years) for plantations of loblolly pine (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) on non-old fields in East Texas have been developed. The height-prediction curves were based on the Richards’ growth function and track well within the range of the data (1-17 years). South. J. Appl. For. 10:109-112, May 1986.

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Introduction To Forest Valuation And Investment Analysis, Steven H. Bullard, Thomas A. Monaghan, Thomas J. Straka Jan 1986

Introduction To Forest Valuation And Investment Analysis, Steven H. Bullard, Thomas A. Monaghan, Thomas J. Straka

Faculty Publications

Most foresters and forest landowners are aware that money has a time value. A dollar today is worth more than a dollar tomorrow. If you borrow $1,000 from the bank today, you would have to pay back more than $1,000 in 90 days. The term forest economists use for this concept is the t :!me value of money: the closer to today you receive a sum of money, the greater its present value.

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