Forest Sciences Commons^™

Solar Radiation Under Thinned And Unthinned Lodgepole Pine Stands On The Utah State University School Forest, Belden B. Durtschi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Shortwave solar radiation was measured in the late winter of 1967 by means of actinographs below the canopy of two lodgepole pine stands, one thinned and the other unthinned, in northern Utah. Observations were made at four randomly selected stations in each stand and at one station in a large clearing. Radiation available below the thinned and unthinned stands was compared, and radiation in the open was compared with radiation beneath each stand.

Nearly all differences between stands were significant as were the differences between each stand and the open area.

A close correlation was shown between total radiation in …

Evaluation Of The Effects Of Reduced Transpiration Upon Soil Moisture Retention In An Aspen Stand Throughout The Growing Season In Northern Utah, Michael Zan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The direct effects of chemically- induced reduced transpiration on soil moisture were studied in a sub-watershed of the greater Logan River drainage.

No statistically significant differences occurred among the total amounts of water transpired by the treated and control units.

The seasonal low points of soil moisture, in September, showed no significant differences in final moisture retention for the two years studied, either for the control or the treated portions of the study site.

The 1967 season showed a lag in soil moisture depletion compared to the 1966 season. Although a later spring in 1967 may have aided in the …

Soil Moisture Recharge In Stands Of Quaking Aspen And Gambel Oak In Central Utah, James L. Boynton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Soil moisture recharge was studied in quaking aspen and Gambel oak forest areas of central Utah. The rate, timing, and duration of the recharge period was observed. Soil moisture readings were taken periodically throughout the winter of 1966 -1967.

Soil moisture recharge begins in October and continues until May. The period of most rapid increase in recharge is between February and May. This corresponds to a rapid decrease in the zenith angle of the sun at the surface of the area and also to a decrease in cloud cover over the area.

Deep soils and high infiltration capacities prevent surface …

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 …

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 …

Existing And Potential Outdoor Recreation Resources In Bear Lake Valley, Utah And Idaho, Dennis H. Black

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Providing adequate outdoor recreational opportunities to the public is now a national problem. Of the many influences affecting the demand for recreation, increased income, population increase, sociological changes, and rapidly increasing technological developments are the more important. In the face of these factors, we must plan better to insure sufficient future needs. This will require evaluation and development of many recreation opportunities.

The Bear Lake are of northeastern Utah and southeastern Idaho is situated along U.S. 89 and within close driving distance of much of Utah's population. Up to the present there has been little orderly or planned development of …

A History Of Timber Resource Use In The Development Of Cache Valley, Utah, Douglas M. Bird

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It has long been realized that the forests and forest products contributed very significantly toward the economic development of the Western United States. However, the extent of this contribution over a relatively small area has never been fully analyzed. Therein lies the primary justification for this paper. The author hopes that the readers of this paper will, through their reading, gain some appreciation of the major role the forest and its products played in the development of the western community.

Because of some important social differences between the area described in this paper and other western communities, the history herein …

The Effect Of Range Condition Upon The Production, Nutritive Intake And Digestibility Of Desert Range Forage In Southwestern Utah, J. Kent Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The 65 million acres of winter range in the Intermountain region furnish forage for about five million sheep and four million cattle each winter for approximately six months. These arid ranges are well suited for winter grazing, and are of paramount importance to the livestock industry. Many of these ranges were fully stocked by 1900 and as livestock continued to increase, many winter ranges were seriously over-grazed (Hutchings and Stewart, 1953). Today many of these ranges remain in a deteriorated condition. Forage production has decreased and desirable plants have been replaced by less desirable species.

Little is known about the …

Seeds In The Forest Floor Of The Ponderosa Pine Type, James T. Krygier

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Regeneration of forest stands is often complicated by the establishment and competition of brush on logged and burned-over areas. The encroachment of brush in the ponderosa pine type of Idaho, particularly Ceanothus velutinus, Dougl. presents a difficult problem to the forest manager. The brush competition severely reduces the growth rate of associated trees, thus extending the period necessary to grow a crop of trees. This situation may seriously limit the economic production of a wood crop of ponderosa pine.

Application Of Pheasant Census Methods In Cache County, Utah, Gordon L. Zorb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An inventory of the stock on hand is a basic step in management. This is true whether the field be business, land, or wildlife management. It is a marginal business man who ignores the basic step of inventory. In the history of wildlife management, however, it has not been unusual to find the cart before the horse. This is not to say that the wildlife manager is, or has been, marginal. His business was inherited ready-made, but often in a bankrupt condition. The problems were there, but not the background of records, techniques, or methodology to cope with them. Often …

A Study Of The Ring-Necked Pheasant (Phasianus Colchicus Torquatus Gmelin) In Northern Utah, William T. Mckean

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Purpose of Study. The ring-necked pheasant (Phasianus colchicus torquatus Gmelin) is well enough known to need no introduction. It is at present undoubtedly the most abundant and most important gallinaceous game bird in northern Utah. Its abundance and its occurrence in agricultural areas has stimulated much general interest. Yet, aside from two food habits studies, both conducted in Utah County, no intensive research has been made into its ecological relationships or its general life history in Utah.

In order to formulate sound management plans for the pheasant in Utah, the Utah Cooperative Wildlife Research Unit has felt the need …

The Ecology Of Agropyron Inerme On Protected And Heavily Grazed Range Land In Cache Valley, Utah, Wallace R. Hanson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the past decade much attention has been attracted to the great range lands of the West. The inherently low productivity of these arid lands coupled with abnormal drought and constantly heavy use by livestock because of lack of grazing control, have caused these lands to become greatly depleted over most of the West. That the vegetation on most range land in the intermountain states is depleted appreciably is evident to the careful observer. Undoubtedly the vegetation of much of the range has decreased in quantity, but more serious in many cases is the decrease in quality. Valuable forage species …