Digital Commons Network^™

Model For Predicting Simultaneous Distribution Of Salt And Water In Soils, Satish C. Gupta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Knowledge of water and salt movement in soils is necessary for development of a management scheme for controlling the quality of irrigation return flow. A computer model was developed to predict the distribution of water and salts in the root zone under varying initial and boundary conditions. The model consists of water flow and salt flow sub-models. The water flow sub-model considers the numerical approximation of the general water flow equation with modification for water loss by evapotranspiration (and thus root extraction). The salt flow sub-model considers the mass flow of salts, chemical exchange, precipitation or dissolution of CaCO_{3 …}

Simulation Of The Dynamics Of Erodible Streams, Kousoum S. Sakhan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The movement of translatory waves over an erodible stream has a critical influence on the time of rise of the hydrograph which, in turn, affects the stability of the stream channel. In the present study, the movement of these flood waves is described by the one-dimensional equations of continuity and motion which are obtained by the space integration of the three-dimensional equation of continuity and Reynolds equations. The flow of suspended sediment is described by a one-dimensional dispersion equation which is derived from a three-dimensional equation of conservation of solid mass in the flow. With some modifications the one-dimensional dispersion …

The Development Of Career Activities For Fourth Grade Students, Barbara P. M. Southwick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Today's youth have few real contacts with the work world and have little knowledge of what is expected from them. Many grade school youngsters are not aware of the type of work their parents are doing. Some do not even know where their parents work. It is difficult for most elementary students to see the relationship between their present school activities and their future life. And all too often, students can not express personal goals or plans.

As students become more aware of the world of work, they should be better prepared to enter it and they should also develop …

Dogmatism And Philosophy: Their Relation To Teacher Acceptance And Understanding Of The New Social Studies, Donald E. Anctil

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research project was a study to determine the relationship of two characteristics--dogmatism and educational philosophy--to teachers' acceptance and understanding of the New Social Studies (NSS).

The sample consisted of 222 secondary social studies teachers from three counties in tho San Francisco Bay Area. Questionnaires were mailed to schools selected at random and were administered by an agent, in most cases, the department chairman, to all social studies teachers in the school, during a single administration period.

The questionnaire utilized four measurement scales. Troldahl and Powell's Short Form Dogmatism Scale and Curran's Short Test of One's Educational Philosophy, published and …

Ecology Of Aroga Websteri Clarke In Curlew Valley, Utah-Idaho, Reed L. Kirkland

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ecology, life history, and population dynamics of the sagebrush defoliator, Aroga websteri Clarke, were studied in the field and laboratory. The defoliator has one generation a year at the Curlew Valley site. It overwintered in the egg stage and passed through five larval instars. Ten parasite species attacked the defoliator at the study site. Four species, Orgilus ferus, Phaeogenes sp., Spilochalcis leptis, and Apanteles cacoeciae, contributed over 75 percent of the total incidence of parasitism. Parasitism ranged from 20 to 76 percent in 1971, but only ranged from 6 to 29 percent in 1972. This decrease …

Potentiometric Titration Of Sulfate Using A Lead-Mercury Amalgam Indicator Electrode, Charles W. Robbins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A lead sensitive indicator electrode was constructed with a 70 percent lead and 30 percent mercury amalgam billet. Sulfate concentrations in pure solutions, natural waters, and soil saturation extracts were determined potentiometrically using the lead-mercury amalgam indicator electrode and a standard calomel reference electrode. Sulfate concentrations over the range 0.4 to 20 milliequivalents sulfate per liter were determined with an automatic titrator and compared to a turbidimetric method for accuracy and precision. The values obtained by the two methods from twelve saturation extracts and three subsurface drainage waters were not significantly different and the potentiometric method was generally more precise. …

Factors Affecting Quality And Location Values For Resident Deer Hunting In Utah, Jim C. Wrigley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Application was made of the economic rent method of resource valuation for the resident deer hunt in Utah. Total economic, location and quality rent values were estimated for all hunting units. These values incorporate the relationship existing between the variable use cost and the units of activity associated with the site.

Data were collected by mail survey from hunters following the 1970 season. Approximately 2033 questionnaires were used in the analysis. Additional data were collected from the Utah Division of Natural Resources.

The total rent value estimated from the model was approximately $3,326,238.00. Eighty-five percent of the total was attributed …

Effect Of Bear River Storage On Water Quality In Bear Lake, Utah-Idaho, Robert L. Nunan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since 1912 concentrations of the major anions and cations (except calcium) in Bear Lake water have shown a steady decrease which has been attributed to a dilution of Bear Lake by Bear River water, Bear Lake having been used as a reservoir for Bear River water since 1918. This study examined the changes which have occurred in Bear Lake water chemistry since 1912 and tested the validity of the dilution theory.

Simple water and salinity budgets were determined for the Bear Lake system and used to simulate the effect of Bear River storage patterns since 1918 on the concentrations of …

Model For Estimating Soil Water Flow, Water Content, Evapotranspiration And Root Extraction, Musa N. Nimah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A mathematical model was developed to predict water content profiles, evapotranspiration, water flow from or to the water table, root extraction and root water potential at the surface as functions of time under unsteady state conditions.

The model was tested in the field at The Hullinger Farm near Vernal, Utah, in 1970 and 1971. Comparison of water content-depth profiles show excellent agreement at the end of a 9- day run in 1970 on oats seeded to alfalfa. In 1971 with alfalfa as the crop, the data show best agreement, between predicted and computed water content-depth profiles, 48 hours after any …

Effect Of Early Growth Cultivation On Beans And Sweet Corn, Raymond L. Cartee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations involving four cultivation treatments were conducted at the Utah State University Greenville Experimental Farm to determine the effect of these treatments on yields of beans and sweet corn. The effects of the different treatments on soil water content, soil temperature, and weed control in beans and corn were investigated. The effect of cultivation on the degree of root rot infection and the effect of different planting dates were also investigated in the bean study.

The pre-emergence treatment (ridged just before the plants emerge) produced a 48 percent greater bean yield and a 40 percent greater corn yield than the …

Economic Development: Diagnosis Of The High Andean Valleys Of Venezuela (Tuñame And Burbusay), Eloy Davila-Spinetti

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to set development policies applicable for the high Andean valleys of Tuñame and Burbusay (Venezuela); and secondly to develop a quick and inexpensive way to assess development prospects of high Andean valleys similar to the ones studied here.

The methodology employed was to classify various agricultural regions with specific development phases using the Thorbecke's classification and policy scheme. Production functions were estimated, fitted and analyzed to determine the parameters pertinent to such a classification for the two valleys where data was available.

The analyses and classifications permitted a limited enumeration of policies for …

Development Of Environmental Education Field Trip Guides For Elementary School Teachers In Cache Valley, Utah, Sandra T. Brown

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was two-fold. The first was the development of environmental education field trip guides to areas in Cache Valley for teachers in grades three through six that would provide learning activities that cannot be structured in the classroom. Six field trip guides to areas of Cache Valley with accompanying activities and discussion questions were constructed. The guides were tested in the field by three groups of teachers and students and teachers not participating in the field test evaluated the guides for difficulties they would encounter in using the guides.

The second study purpose was to determine …

Plant Adaptation To Cold I. Chlorophyll Ii. Minerals, Peter Rosen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A number of montane herbs in northern Utah typically form flower buds beneath the snow cover and flower either through it or immediately after its recession. Two of these species, one naturally occurring, Claytonia lanceolata, and one cultivated bulb, Galanthus nivalis, were investigated for their response to this stress environment.

Snow depth patterns, chlorophyll content of tissues, and plants grown in light-tight boxes, suggest that light passing through the snow to reach plants growing underneath is not critically involved in the timing of their developmental cycles or in their ability to endure this low temperature environment.

Ability to endure stress …

The Comparative Effects Of Two Reinforcement Schedules Applied To Groups In Teaching Arithmetic Skills, Ronald C. Bennett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A behavioral approach to teaching in the public school system is difficult because of the inherent difficulty of finding positive reinforcers and administering them simultaneously to large groups of students.

This study attempts to apply the same tangible reinforcers to two groups of students under different schedules of reinforcement. The students in the study were in special classes termed "learning adjustment" classes because of their failure to perform at grade level in regular classroom settings.

One group was on a continuous schedule of reinforcement using tokens and gold strike stamps as reinforcers. The second group was also on a continuous …

Sequential Analysis For Tolerances Of Noxious Weed Seeds, Seung Tokko

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The application of a sequential test, the sequential probability ratio test, for the tolerances of noxious weed seeds is studied. It is proved that the sequential test can give a similar power curve to that of the current fixed sample test if the test parameters are properly chosen.

The average sample size required by a sequential test, in general, is smaller than that of the existing test. However, in some cases it requires relatively a larger sample than current test.

As a solution to the problem a method of truncation is considered. A kind of mixed procedure is suggested. This …

Teaching Reference Skills To Secondary Students With Reading Disabilities, Sheila Sunada Newlin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

How can I find a job by looking at a newspaper?

What articles does this magazine contain?

What is an index?

How do I find the meaning of this word?

These are problems which any high school student may encounter. Some students may be able to locate the answers immediately. However, the student with a reading disability may be greatly hampered and frustrated because of his lack of general skills in reading and locating information. This student may have difficulty finding facts from common sources of information both in and out of school.

Inorganic Mercury Uptake And Mercury Tolerance Demonstrated By Several Species Of Algae, Daniel S. Filip

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The inhibition by low concentrations of inorganic mercury has been established for several species of freshwater algae, and a method has been developed to determine mercury levels in algal cells, having good precision at levels as low as one hundred parts per billion.

Rapid sorption of inorganic mercury by glassware was minimized by using heavy algal cultures and short term incubations. The rates and extent of mercury uptake by three species of freshwater green algae were delineated under laboratory conditions. Replicate mercury containing cultures yielded slightly different mercury concentrations upon analysis due to analytical errors and glass sorption. Therefore, percent …

A Study Of A Portion Of The Distributive Education Teacher Preparation Program At Utah State University, Darrel Q. Dixon

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The major purpose of distributive education is to prepare the student for entry-level employment in distributive occupations. This preparation should help workers become successful and advance in their chosen field of distributive occupations.

No matter how instruction is organized, when it is identified as vocational distributive education, there are no differences in the results desired. Students are to be able to meet employment qualifications with the confidence and the competencies necessary to begin marketing and management careers.

To meet this goal, the student should qualify himself to receive satisfaction and contentment in his work. Sidney P. Marland's deep expression in …

A Survey To Determine Methods Used By Selected Employers Of Cache County, Utah, To Assess Desirable Personal Characteristics Need By Typists, Stenographers, And Secretaries, Gail Verderamo Benson

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

One major aspect of business education has always been character training. In many cases, businessmen feel that the technical skills are not as important as good character. Therefore, business educators must consider the wishes of the businessman and train their students to fill the jobs he offers. By trying to instill many of the desirable personal characteristics in students, business educators may help meet this goal.

The character traits needed by business would depend on the needs of the individual business and the personal preferences of the person in charge of hiring. There are differences, both in quantity and quality, …

Educational Mathematical Games As An Aid To Learning With Seventh Grade Mathematics Students At Wahlquist Junior High, Lewis Riley Taylor

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

One of the trends in mathematics has been the introduction of educational games as learning devices . A student's attitude toward mathematics is recognized to be very high when games are used. Walter Cronkite, on CBS television, summed up the promise of educational gaming when he said, "By participating, by playing a game , an other - wise dull subject becomes fascinating and unforgettable to the student." (Nesbitt, 1971, p. 2) Bradfield states it in this manner:

Many teachers of mathematics are unbelievably boring in their approach to teaching. Consequently , many potentially strong students never develop any great liking …

Methodological And Validation Study Of Seed Reserves In Desert Soils, David W. Goodall, Stuart Childs, Herman Wiebe

Memorandum

The development of a method for separating seeds from desert soils, and enumerating them, is described.

In the Great Basin desert, species differed greatly in their depth distribution, some having a peak at or just below the surface, while others were still abundant below 5 cm. Much higher seed densities were found beneath the canopies of shrubs and of tussock grasses than in the inter-spaces; no consistent differences were found, however, associated with the species of the canopy plant, or with distance from its center.

Tentative estimates are given of the seed population in the four validation sites in Curlew …

Reports Of 1971 Progress Volume 3 Terrestrial Validation Studies Part Ii. Individual Sites, U.S. International Biological Program

Progress reports

No abstract provided.

Abstract Of 1971 Progress Report, U.S. International Biological Program

Progress reports

No abstract provided.

Historic Resource Study: Cattle Raising In The Canyons, James Sheire

Elusive Documents

No abstract provided.

Standing Crop And Productivity Of Marsh Vegetation At Saratoga Springs, California, W. G. Bradley

Memorandum

No abstract provided.

Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, Paul T. Tueller, Garwin Lorain

Memorandum

No abstract provided.

Seasonal Use Of Soil Moisture By Mature Velvet Mesquite, Dwight R. Cable

Memorandum

No abstract provided.

Ingestion Rates, Live Weight Caloric Densities And Standing Crop Estimates For Desert Biome Rodents, R. K. Schreiber, D. R. Johnson

Memorandum

No abstract provided.

Life History And Life Process Studies Of The Water Scavenger Beetle, Hydrophilus Triangularie Say, M. D. Hallmark, C. R. Ward

Memorandum

No abstract provided.

Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, W. G. Whiteford, G. Ettershank

Memorandum

No abstract provided.