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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 …

Xanthium Strumarium L.: Extraction And Assay Of Floral Promotive Principles And Additional Investigations Into Inhibition Of Flowering, David D. Gibby

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

New techniques in extraction and assay of florigenic substances were tested. Initial response to the buffer-PVP extracts proved promising, but after several successful experiments, results could not be duplicated. Possible reasons for the failure are discussed.

A long-day inhibitory effect, demonstrated earlier by Gibby and Salisbury (25), was further investigated. Experiments with ¹⁴C-labled assimilates disproved the hypothesis that the inhibition is a result of assimilate translocation. Other experiments pointed to the probability of phytochrome involvement as well as protein synthesis as part of the inhibitory process. The nature of inhibition was ascribed to a localized inhibitory condition, probably a …

Radioimmuno Detection Of Virus, John Carlos Perez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The commonly used techniques for viral detection are tedious, time consuming and in many cases inadequate. As a consequence, a rapid, sensitive radioimmunoassay has been developed for detecting viruses. Reovirus is reacted with homologous ¹²⁵I labeled antibody after which the antigen-antibody complexes are separated from unreacted labeled antibody by density gradient ultracentrifugation. After centrifugation, the density gradient is fractionated and the radioactivity counted in a liquid scintillation spectrometer.

The amount of activity in the lower fractions of the density gradient is directly proportional to the virus concentration. The radioimmunoassay developed has several advantages over other viral assay procedures; the …

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 Cytological, Morphological, And Anatomical Study Of Elymus Simplex, Stephan L. Hatch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to clarify the taxonomy, report the chromosome number, report meiotic chromosome behavior, and give the anatomy of Elymus simplex Scribner and Williams. The isotype of Elymus simplex and the type description were used to compare this and other species that have been confused.

Cytological and anatomical methods are reported as an aid in clarification of the taxonomic problem that has been associated with this species.

Xenobiotic Detoxication Potential And Drug Induced Changes In Carbaryl Toxicity In The Alfalfa Leafcutter Bee, Megachile Rotundata (Febricius), Richard M. Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The alfalfa leafcutter bee, Megachile rotundata, one of the most important pollinators of alfalfa, generally became more susceptible to carbaryl as the adults aged. LD₅₀ values for carbaryl toxicity were 240,166, 109, and 51 μg carbaryl/gram for the 1, 2, 3, and 4 days-old adult male bees. For the female bees, these were 245 , 551, 289, and 262 μg car-baryl/ gram. Lipid content and microsomal enzyme activity (measured by EPN detoxication in vitro) decreased in both sexes as the bees aged.

Synergist ratios, defined as the ratio of the LD₅₀ of carbaryl alone …

Petrology Of The Ordovician Swan Peak Formation, Southeastern Idaho And North-Central Utah, Warren J. Schulingkamp Ii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Swan Peak Formation in southeastern Idaho and north-central Utah is a sedimentary unit consisting of orthoquartzite, sandstone, siltite, shale, and limestone. The formation is divisible into three members, and the lower two members each are divisible into two informal lithologic subunits.

The lower member consists of a lower subunit of gray, calcareous sandy siltite composed of subangular to subrounded quartz grains cemented by quartz overgrowths, calcite, or iron oxide, and an upper subunit of black shale with minor interbedded silty quartzose sandstone and biomicrite (limestone).

The middle member consists of a lower subunit of interbedded pale green shale and …

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 …

The Influence Of Atmospheric Dust And Foliar Leachates On The Chemical Quality Of Throughfall In Northern Utah, Dennis R. Parent

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the summer of 1971 a research project was carried out in an attempt to determine the influence of dust and leachates on rainfall quality. Open precipitation collectors, collectors under polyethylene screens, collectors under Douglas-fir (Pseudotsuga menziesii) and juniper (Juniperus scopulorum), and leaf analyses were used to determine the relative effects of these two processes by which chemicals are incorporated into the rainwater. All samples were analyzed for sodium (Na⁺), calcium (Ca⁺⁺), magnesium (Mg⁺⁺), potassium (K⁺), and available phosphorus. Under the trees, sodium concentrations increased as much as …

A Study Of The Effects Of Water Institutions On Planning And Management Of Water Resources In Utah, Donald H. Mclean

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One area of research that has been somewhat neglected in water planning programs and water development is that pertaining to water law and water institutions. Over the years each state has developed a complex system of water law and organizations for the allocation and distribution of water. The usual role of these institutions is one of orderly development and the efficient use of the water resource. However, in many cases water law and institutions have imposed serious constraints upon the planning and the most efficient use of a valuable resource.

This study, through historic research, has attempted to define these …

Tissue Mineral Imbalances In Cattle With Brisket Disease, Patricia H. Field

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Twenty four cattle, six each of healthy cows and calves, and cows and calves with brisket disease, were obtained, examined and slaughtered. The concentrations of calcium, chloride, cobalt, copper, iron, magnesium, molybdenum, phosphorus, potassium, sodium and zinc; and percent absolute dry matter and percent ash were determined in tissues selected from the following: cardiac, hepatic, renal, osseous, whole blood and blood serum. In addition, certain physical and biological parameters were recorded for each animal. The results were analyzed as a 2 x 2 factorial, segregating the effects of age and brisket disease, and the age-disease interaction.

The following statistically significant …

A Survey Of Awareness Programs Regarding Infant Hearing Loss, Ronald Rao Bateman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hearing conservation specialists are aware of the need for early identification and diagnosis of impaired hearing. This awareness of need has led to the development of several identification methods in the United States. Public awareness programs designed to inform laymen and professionals of the danger signals of infant hearing impairment currently are coming into focus, both as a separate entity and as part of total identification procedures.

Current public awareness programs regarding infant hearing loss were surveyed in the present study and recommendations on a model awareness program of this type were obtained. Fifty-one hearing conservation specialists participated in the …

Irrigation And Non-Irrigation Alternatives For Reducing Sugar Cane Transportation Costs In Santa Cruz, Bolivia, Lee M. Bailey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The major objective of this study was to investigate various alternatives for lowering the cost of transporting sugar cane in Santa Cruz, Bolivia. These alternatives included both irrigation and non-irrigation possibilities. Production costs for sugar cane were determined by using studies completed by the USAID-Utah State University study team, budget studies of Senor Carlos Castro of the Guabira' sugar cane mill in Santa Cruz and a study undertaken by Senor Enrique Gomez, a graduate student at Utah State University.

A cane registry commissioned by the National Sugar Cane Commission was used in conjunction with a least-cost transportation model in order …

An Evaluation Of Selected Aspects Of The Student Teaching Program In Physical Education At Utah State University, Clifford R. Andreasen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was an attempt to determine through a survey of opinions to what extent the objectives, methods and procedures were effectively being accomplished in the professional preparation of student teachers in physical education at Utah State University.

A questionnaire was developed and administered to student teachers who were currently completing their student teaching experience, and mailed to graduates who had completed their preparation program between 1966 and 1971.

The areas surveyed, the pre-student teaching preparation, the assistance given by the university supervisor and the assistance rendered by the cooperating teacher were for the most part found to be adequate …

Evaluation Of The Filter Paper Method For Estimating Soil Water Potential, Samir Al-Khafaf

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The filter paper method for measuring soil water potential was evaluated. The method was calibrated using salt solutions (-1.4 bars to -22.4 bars), sample chamber psychrometer (-1 to -50 bars), pressure plate (-0.1 to -15 bars) and soil column at equilibrium (0 to -0.2 bars). It was found that the absolute temperature had little effect on the predicted soil water potential, but a temperature variation had a large effect. It was found that the temperature fluctuation must be small. The predicted water potential was influenced by the type of contact of the soil with the filter paper. It is suggested …

A Study Of The Relative Importance Of Training On The Employability Of The Mentally Retarded As Rated By Employers And Educators In Cache County, Utah, John F. Hurst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Relative differences in attitudes between educators and employers concerning training of the mentally retarded within Cache County were studied by analyzing their responses to 40 questions dealing with Academic, Personal, Social, and Vocational Skills.

Academic Skills were found to show no statistical significance in terms of attitude differences expressed by educators and employers as they relate to successful employability criterion.

Personal Skills were found to show no statistical significance in terms of attitude differences expressed by educators and employers tested as they relate to successful employability criterion.

Personal Skills were found to show no statistical significance in terms of attitude …

Reliability Comparisons Of Navajo Indian And American Caucasian Individuals Responding To Acoustic Stimuli From Conventional And Automatic Recording Audiometers, J. Clinton Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was made to determine the reliability of Navajo Indian and American Caucasian subjects to air conducted pure tones.

Audiograms were obtained on 30 Navajo and 27 Caucasian subjects as they responded to pure tones presented via a conventional audiometric technique and also via an automatic recording technique.

One audiogram via conventional audiometry and one audiogram via automatic audiometry were obtained on the same day. Replications of the same tests were administered on the following day.

Statistical analysis of the data was employed to determine the reliability of repeated test measurements. Mean threshold differences, standard deviations, Student's "t" test …

An Experiment To Determine The Effectiveness Of A Remedial Reading Program With Students At Utah State University, Judith J. Ivarie

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study is to determine the effectiveness of 20 hours of remedial reading instruction as compared with 20 hours of vocabulary instruction on a select group of university freshmen in the Remedial English Program. Three measures of effectiveness used were comprehension, rate, and effective reading rate. The effective reading rate was determined by computing the arithmetic product of level of comprehension and rate of reading. The results indicated that for this particular population, using the materials and instructional techniques described, neither group increased reading rate at the .01 level of significance. The effective reading rate of the …

Optimal Allocation Of Irrigation Water: The Sevier River Basin, Harold H. Hiskey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Economic efficiency criteria are used to optimally allocate irrigation water in a closed river basin (Sevier River). The Basin is geographically divided into four subbasins. Linear programming model were developed for each of the four areas and used to generate value of marginal product schedules by parametric variation of water during the late irrigation season (after July 1). Differences in value of marginal product for average annual water deliveries were indications of a malallocation of late season water. A reallocation involving 28 percent of the restraining input (water) would increase net farm incomes (returns to capital, labor, and management) an …

The Usefulness Of 4-H Project Manual As Seen By Members Parents And Adult Leaders In Cache County, Vichit Viasayanunt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to survey the usefulness of the 4-H members' project manual according to the opinions of members, parents, and adult leaders in Cache County, State of Utah.

Two USU Extension Agents, 140 4-H members, 119 parents, and 30 leaders cooperated in this survey. A separate questionnaire accompanied by a cover letter by the Extension Agents and a letter of explanation by the author was sent to each person in the three categories mentioned. Questionnaires were mailed to 200 4-H male members, 190 parents and 46 adult leaders. Evaluation of the usefulness of the manuals …

An Evaluation Of The Farm Machinery Market In Utah, Paul J. Stuart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis was to evaluate the farm machinery distribution system in Utah using market structure analysis. Questionnaires to farm machinery firms as well as to farmers were used to gather data on market structure and conduct. The traditional market structure theory was used as an analytical framework. Examining the efficiency of factor markets revealed possible avenues for savings to farmers.

Boron Movement In Soil Columns, Joseph William Stucki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three adsorption theories--Langmuir, B.E.T., and Freundlich--were applied to boron interaction with Aiken clay loam and Vernal sandy loam soils to determine which bests describes the system.

Column studies were conducted to obtain constants related to mass fluid flow and fluid dispersion within the column. An inert ion was used to obtain the pore volume and to calculate the fluid dispersion coefficient. These data were used to solve the material balance equation by the explicit numerical method developed by Lai for a digital computer. The output from the computer was a predicted profile boron distribution within the soil column.

The soil …

A Study Of The Effectiveness Of Tune-Ups In Controlling Vehicle Emissions In Salt Lake County, Howard B. Mcintosh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Federal Government has placed stringent standards on the manufacturers of automobiles to control vehicle emissions. Few states standards have been set for used vehicles to insure the vehicle continues to meet this standard.

Studies have shown that vehicles that are properly tuned are emitting less harmful pollutants from the exhaust. Additional studies are needed to determine if cars are being adequately turned to meet exhaust emissions.

The study showed 93 per cent of the new 1971 model cars were not meeting the standard established by the Environmental Protection Agency. Eighty-seven per cent of the 1970 model cars and 83 …

An Analysis Of Area Interests And Employment Projections With A Recommended Program Of Study And Educational Specifications For An Area Vocational Center For San Juan County, Utah, Loren Martin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to investigate the needs of San Juan County, Utah, in regard to an overall program of vocational education including ancillary services and new facilities for an area vocational center. Literature was reviewed concerning the need for vocational education, recent developments and trends in vocational programs, and other refinements in educational theory which influence instruction. Several groups of people were surveyed to determine the needs and interests of area residents with special attention given toward the Navajo Indian population.

The overall program which was developed incorporates aspects of the career education theme as it relates …

Economic Efficiency Of Grazing Systems, Muhammad Nazir

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Benefits and costs of implementing the specialized grazing systems on federal rangelands managed by the Bureau of Land Management (BLM) were studied. First only the direct benefits and costs were used to determine the internal rates of return on the Bureau of Land Management investments in grazing systems. Secondly, the effects of these systems on profits of private ranchers were determined. Finally the benefits and costs stream on the Bureau of Land Management and the changes in ranchers' profits were brought together to find out the net gain to society from investing the federal funds in specialized grazing systems.

The …

Aquatic Invertebrate Consumption By The Major Fish Species In The Blacksmith Fork River, Theodore F. Meyers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Exponential rates of digestion are described for brown trout and whitefish for July, October, December (1969), and April (1970). The slope of the line fitted to the digestion data from each month was defined as the instantaneous rate of digestion and applied to an exponential growth model to determine the instantaneous consumption rate.

The digestion and consumption rates were applied to field measurements of percent fullness to determine the amount of food material ingested during a 24 hour period. Brown trout consumed 127, 24, 19, and 84 mean percent of their stomach capacity in the July, October, December, and April …

Toward A Measurement Of The Adequacy Of Health Services In Rural Utah, Michael K. Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research reported in this thesis was an exploratory nature undertaken for the purpose of developing a measure of the adequacy of health services in three rural counties in Utah. The three counties included in the study area were Beaver, Piute, and Wayne.

Adequacy of health services in the three-county area was measured on the basis of (1) the general population's, or consumer's, perception of the adequacy of the existing services, (2) the professional's or provider's perception of the adequacy of the existing services, and (3) adequacy of the existing services determined by a comparison with an established standard.

The …

Economic Development Of Thailand: An Analysis Of The Agricultural Sector, Thamnoon Soparatana

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study takes a look at government aid to agriculture in Thailand and attempts to analyze its effectiveness. Only two crops have been aided directly by the government, rice and rubber, though others have undoubtedly benefitted by improvements in the country's infrastructure. The regressions performed on some simple production functions indicate that rice yields have been improved through government programs. The program for rubber largely a subsidy for new plantings, ha as yet not had much impact on yields. This maybe due to the fact that the pay-off period is at least seven years. There is also some evidence that …

An Economic Analysis Of Feeding Steers Versus Heifers, Duane Sorensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The question of which sex of cattle to feed is a basic economic decision which must be made by feeders. An economic analysis of costs and returns associated with feeding steers in comparison to heifers would give feeders some assistance in making this decision.

The objectives of this study were to make an economic analysis of feeding a pen of steers and a pen of heifers in a feedlot, then determine the break- even prices for feeder cattle which would make the feeder indifferent to whether he fed steers or heifers , and finally to develop a decision model that …

Nitrogen Movement Under Irrigated Corn As Influenced By Nitrogen Source And Rate, Douglas C. Muir

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine nitrogen movements under a fall applied fertilizer as affected by rate of application of fertilizer, type of fertilizer carrier, and by crop grown. Two nitrogen fertilizers, calcium nitrate and ammonium sulfate, were applied in the fall of 1970. The soil profile was sampled in the spring of 1971 and again in the fall of 1971. Nitrate-nitrogen from both the calcium nitrate and the ammonium sulfate applications was found to have moved significantly from the time of application to the time of spring soil sampling. Two effects from the high rate of both …