Forest Sciences Commons^™

Conusmer Sentiment And Utah's Out Of State Visitor, Perry J. Brown, John D. Hunt

Forest Management Faculty Publications

No abstract provided.

A Study Of Dietary Effects On Peripheral Blood Constituents Of The Female Mallard Under Estrogen Stimulation, Nickolias George Smyrnios

Masters Theses

No abstract provided.

Tb28: Weight, Nutrient Element And Productivity Studies Of Seedlings And Saplings Of Eight Tree Species In Natural Ecosystems, Harold E. Young, Paul M. Carpenter

Technical Bulletins

The objective of this study was to obtain weight and nutrient element information on complete trees ranging from 1 to 35 ft in height above ground for the same eight species (red spruce, balsam fir, white pine, hemlock, northern white cedar, white birch, red maple and aspen) as a downward extension in size classes.

Tb27: Fresh And Dry Weight, Nutrient Elements And Pulping Characteristics Of Northern White Cedar, Thuja Occidentalis, Richard F. Dyer

Technical Bulletins

Northern white cedar was selected as an eighth species for complete tree investigation of weight, nutrient elements and pulping characteristics because it comprises approximately 13% of the total softwood growing stock in Maine, but only amounts to about 2% of the total softwood timber cut for all purposes. It is hoped that the information in this bulletin will provide basic information permitting northern white cedar to become a more meaningful segment of the Maine forest economy.

Hydrogen Ion Concentration Of Sheet Making Water And Its Relationship To The Hygroexpansion Of Paper, James M. Rischar

Paper Engineering Senior Theses

The hygroexpansivity of paper is of particular importance in the paper industry. As paper dimensions become more critical, the problem of hygroexpansivity in paper necessarily becomes more critical. Since the hydrogen ion concentrations (pH) of papermaking water effects the use of fillers, dyes, size, and the quality of the final product, the relationship between hygroexpansivity of paper and the pH of papermaking water is, therefore, an important consideration. Fortunately, the experimental evidence from this project indicates that the pH has little effect upon the hygroexpansion of paper. But rather, this project found the sheet density to have a far greater …

Investigation Of Factors Influencing The Use Of Wet Strength Resin On Unwashed Nssc Pulp, James L. Latta

Paper Engineering Senior Theses

To improve the wet strength of paper, colloidal dispersions of thermosetting wet strength resins are added to the papermaking furnish. However, these resins show low efficiency when applyed to unwashed neutral sulfite semichemical corrugating medium. To determine the reason for this, experiments were made in which corrugating mill stock was made into handsheets using Paramel HE and Kymene 557 wet strength resins.

It was found that Kymene 557 gave poor wet strength when used at levels less than .67%, but that further addition brought increasingly larger gains. The wet strength attained with Paramel HE showed a rapid rise up to …

Structure Of Two Cover Types Of Southern Oak Woodland In California, Henry A. Zuill

Loma Linda University Electronic Theses, Dissertations & Projects

The southern oak woodland of southern California was analysed relative to the local distribution of the trees, density per acre, relative density, relative dominance, percentage of trees growing in close association to boulders, percentage of trees forked below breast height, frequencies of tree diameter and percentage of cover. These characteristics, with the exception of cover, were derived from measurements made using the wandering quarter method. Cover was computed from measurements made on aerial photographs.

A test for homogeneity applied to the distance measurements divided the woodland into two groups relative to local distribution. Both woodlands are non-random with one (dense …

South Dakota Bird Notes, Keith E. Evans, Roger R. Kerbs

USDA Forest Service / UNL Faculty Publications

APPROXIMATELY 90,000 small stock ponds are scattered throughout South Dakota. The majority of these ponds are less than 10 acres in size, and depend entirely on surface runoff for their water supply. Although their primary purpose is to provide drinking water for livestock, many species of waterfowl and shorebirds use the pond areas for resting and feeding during spring and fall migrations, and for nesting habitat throughout the summer.

Neither the amount of use nor the potential for use by birds on stock ponds in South Dakota is known. Preliminary data presented here are results of waterfowl observations on 13 …

Forestry Bulletin No. 15: Silviculture Of The Minor Southern Conifers, Laurence C. Walker

Forestry Bulletins No. 1-25, 1957-1972

An analysis of many conifers, including pine, cedar and cypress.

Soil Moisture Depletion By Quaking Aspen And Gambel Oak In Central Utah, Jere J. Christner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Soil moisture depletion was studied in quaking aspen and Gambel oak areas of central Utah. The study area is located at about 8100 feet elevation in a zone with 20 to 25 inches precipitation annually.

Treatments ranged from no disturbance to clearcutting. Soil Moisture was measured periodically during the summer of 1966.

Results showed less soil moisture depletion on the plots of least residual basel area. Average soil moisture depletion the season following cutting at two sites was 4.3 inches less than it was on higher residual basal area plots.

The reduction in soil moisture depletion occurred principally below the …

Seasonal, Diurnal And Species Variation In Forage Moisture Content In Relation To Site On Mountain Summer Range Of Northern Utah, Chaudhry Mohammad Sharif

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Practical assessments of range production and utilization are based on forage weight estimates. In preparing these estimates moisture content in green vegetation offers some problems. The moisture component is not likely to be constant for a given species. Diurnal, seasonal and site variability have been well illustrated for agronomic and tree species (Salisbury, 1848; Jenkins, 1879; Miller, 1917; Pearson, 1924; Watkins, 1940; Parker, 1951; Ackley, 1954; Werner, 1954; Zohary and Orshan, 1956; Slatyer, 1959; Kozlowaki, 1965 and Jame son, 1966). Since variability is also likely for range plants, computations made on green weights are apt to be fallacious. It is …

The Affect Of Fiber Length On Wet-Web Rheology, Jeff Lowe

Paper Engineering Senior Theses

A spruce bleached kraft pulp was cut to varying degrees in an attempt to determine the influence of fiber length on the rheological properties of the wet-web. The results indicated that greater fiber lengths increased wet-web strength properties. The rheological data implied surface tension as the basic mechanism of strength properties between 16% and 30% solids, and on this data the mechanism of wet-web behavior under stress was proposed.

Forestry Bulletin No. 14: Practical Point-Sampling, Ellis V. Hunt Jr., Robert D. Baker

Forestry Bulletins No. 1-25, 1957-1972

"Mr. L.R. Grosenbaugh (1952) introduced point-sampling to American foresters, citing Mr. W. Bitterlich's earlier work in Europe. Primarily it is, he said, 'A rapid method of sampling tree basal area per acre . . . '"

The Effect Of Relative Sediment Volume On Sheet Properties Of Coated Paper, James A. Chalfin

Paper Engineering Senior Theses

The degree of dispersion of pigment has been claimed to be an important variable in the determination of sheet properties such as smoothness and gloss. The degree of dispersion of a pigment can be related to relative sediment volume (RSV) by comparison of the solid and void volumes of a clay slip. One school of thought suggests that there is a relation between RSV and coated sheet properties; this relation being, as RSV decreases, smoothness and gloss increase. It was decided that an attempt to relate RSV (degree of dispersion) to optical properties of coated paper could be valuable. Because …

Using Kelgin To Increase Heat Resistance And Strength Of The Sheet Of Paper Against Prolonged Heating, Jeffrey Atkinson

Paper Engineering Senior Theses

The purpose of this paper has been to examine what properties of sheet strength may be stabilized by the use of kelgin in a size press application and after a subsequent heating period.

A softwood kraft pulp was used because of the strength properties which it possesses. Alkaline sizing with Aquapel and Kymene was felt to be the best because of the alkaline p.H. range which was desired. The sheets were sized with solutions of Kelgin (M .V.) of varying concentrations and treated at 150 and 175 °C. The effects were studied using the M.I .T. Fold Test, the Instron …

The Effect Of Fiber Length On Tear Strength, Kit Funderburk

Paper Engineering Senior Theses

The purpose of this investigation was to study the effect that fiber length had on the tear strength. Of utmost importance to the results of this study was the elimination or controlling of variables which have appeared in all related studies to date. With this in mind, an experimental procedure was drawn up which would eliminate or control the variables. Long, whole fibers were isolated, formed into handsheets, and dried without having been pressed. The handsheets were then cut in order to reduce the fiber length. Cutting of the fibers was done with a paper cutter and was followed by …

Effect Of Dispersant On The Centrifugal Dewatering Of A High Ash Primary Clarifier Underflow, George J. Renner

Paper Engineering Senior Theses

The objective of this study was to determine the effect of dispersants on the centrifugal dewatering of a high ash, paper mill, primary clarifier underflow. By using dispersants a higher cake dryness and smaller sludge volume could save the paper industry money.

With this objective in mind, primary deinking sludge samples were defibered and evaluated as to the effect of a dispersant during centrifugal dewatering. The effect of fiber on the dispersants was determined by evaluating sludges with predetermined amounts of fiber fines added prior to centrifugation.

It was found that use of dispersants during centrifugal dewatering resulted in an …

The Effect Of Surface Tension And Viscosity On Wet-Web Strength, Wayne H. Nay

Paper Engineering Senior Theses

A study of the effects of surface tension and viscosity on wet-web strength shows that they are related. Hand sheets were made and pressed on the Noble and Wood Sheet Mold. Tests were run on sheets with solids varying from 18 to 28 percent. The Instron Tensile Tester gave more consistant results for wet-web testing than did the Brecht Tester. Carboxy propyl methyl cellulose, a cationic starch, oleic acid, and sodium hydroxide were used to vary the surface tension and viscosity of the entrained water in the web. It was found that as the surface tension was lowered, the wet-web …

A Study Of The Conductivity Of Several Conductive Polymers, Howard W. Renner

Paper Engineering Senior Theses

The purpose of this thesis is to compare the conductivities of several solutions now in use in producing electroconductive paper. The testing procedure involved the use of a Kiethyl 610 B electrometer with two aluminum discs for conductance through the sheet and two brass strips for conductance across the sheet. Attempts were made to improve the conductance of the solution by the addition of surface agents in the belief that this would lead to better dispersion and thus to better film continuity. No effective method was found to improve the conductivity of a solution of given concentration. Increasing the concentration …

The Effect Of Changing Dryer Temperature On The Gloss Characteristics Of Coated Paper, Dan Kaiser

Paper Engineering Senior Theses

The purpose of this study was to note the effect of varying drying temperatures on the gloss of papers coated with three different coating formulations. The three coatings studied contained Polyvinyl Acetate, a combination of styrene butadiene and casein, and a formula using casein and styrene butadiene as binders in conjunction with a fine particle size clay. Coating applications and drying were accomplished with a Keegan Laboratory Coater.

The results indicated that increasing drying temperatures decreased gloss, and that overdrying increased gloss.

Tb25: The Effect Of Stand Factors On The Productivity Of Wheeled Skidders In Eastern Maine, Ernest B. Harvey Iii, Thomas J. Corcoran

Technical Bulletins

The objective of this study was to determine what forest stand factors, as they constitute a set of operating conditions, affect skidder and skidder crew productivity and the degree of their effect.

Diseases Of Forest Trees And Forest Products, A. F. Verrall

eBooks

No abstract provided.

Thermophysical Properties Of Bark Of Shortleaf, Longleaf, And Red Pine, William E. Reifsnyder, Lee P. Herrington, Karl W. Splat

Yale School of the Environment Bulletin Series

No abstract provided.

The Structure Of Germination In Pinus Lambertiana Dougl., Graeme P. Berlyn

Yale School of the Environment Bulletin Series

No abstract provided.

The Hamel Nursery, K S. Cole

Journal of the Department of Agriculture, Western Australia, Series 4

A LITTLE known, but highly productive use of irrigation water occurs at the Forestry Department Nursery, Hamel.

Seedlings of trees and shrubs are raised during the summer for sale the following winter.

Sales are made to the farming community and many trees are used by the Forest Department in its reafforestation programmes.

Control Of Eucalypt Regrowth, J G. Paterson

Journal of the Department of Agriculture, Western Australia, Series 4

EUCALYPT regrowth has presented a problem to farmers throughout the State for many years.

Some species are checked by heavy grazing although, in the main, this method is far from satisfactory.

Ornamental Trees For The Farm Garden, P Luff

Journal of the Department of Agriculture, Western Australia, Series 4

THE need for trees in the farm garden is being realized by many people.

Trees around the homestead are required to give such features as shade, colour, fragrance and many other advantages to generally make an area more livable.

Besides these advantages, trees appear to help smaller plants flourish by increasing the humidity and providing various degrees of shade and sunlight.

Influence Of Growth Media, Temperatures, And Light Intensities On Aspen Root And Top Growth, Gerald F. Gifford

Aspen Bibliography

No abstract provided.

Notes On Hypoxylon Canker Of Aspen In Alberta, J.A. Baranyay

Aspen Bibliography

No abstract provided.

Use Of Trembling Aspen In Pulp And Paper Manufacture, J. L. Keays

Aspen Bibliography

No abstract provided.