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Relative Rates Of Return To Controlled Irrigation Among Classes Of Summer Paddy In The Guayas Basin, Ecuador, Percy G. Aitken

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to examine rice production methods with special emphasis on farm and water irrigation management practices in the different rice farm types of the Guayas Basin of Ecuador. To do this, farmers were divided into eight categories on the basis of farm practices, seasonal farming, irrigation facilities and level of mechanization. Profits per hectare ranged from 4,807 to 762.10 sucres per hectare. Mechanization varied from totally mechanized to total absence of machinery. Year round farming varied to seasonal farming. Average production varied from 110 quintals of hulled rice to 20 quintals per hectare.

The …

Influence Of Social Class On Children's Perception Of Teachers, Kathleen Thomas Mcdonald

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis was to examine children's perceptions toward teachers, as related to the child's social class background, and to investigate the influence of social class upon their perceptions.

A projective pictorial test, which consisted of nine pictures concerning teachers and children, was administered individually to forth fourth grade school children in two Ogden, Utah, public schools.

The findings of this study were that there are differences between middle and lower-class children in their perceptions toward teachers. Children of middle-class backgrounds showed more positive perceptions toward teachers, and lower-class children were found to have a more negative perception …

Family Planning Of Mormon Women In Three-Generation Families, Brent C. Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This intergenerational study compared the family planning and related attitudes of females who were daughter-mother-grandmother relatives. Questionnaire responses of eighty-one subjects in twenty-seven three-generation families were analyzed regarding birth control, abortion, and population crisis attitudes. Other variables studied included Mormon orthodoxy, education, and place of residence.

Except for abortion, the generations had significantly different attitudes. The oldest generation's attitudes, which were the most conservative, differed significantly when contrasted with the more similar attitudes of the middle and younger generations. Mormon orthodoxy was the most dramatically significant factor in attitude differences. Education and residence were not significant sources of attitude variance; …

Individual Family Contribution To Paper Pollution In Cache County, Carroll Porter Latham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Paper waste discarded by families of five persons in Cache County was studied for two seven-day periods. The sample consisted of 19 families comprised of a father who was employed full-time, a mother, and three children living at home. A background questionnaire was administered to each family for the purpose of describing the sample.

Sample families were given (1) plastic bags for storing of paper wastes and (2) bathroom tissue, the unused portion of which was collected with the other paper discards. The weight of all paper discards was tabulated for each family and an average was tabulated for families …

The Effects Of Age And Induction On Cockroach Mixed Function Oxidase Activity And Cell Morphology, Richard L. Turnquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Female American cockroaches showed definite age-dependent changes in levels of activity of the microsomal mixed function oxidase chain. Cytochrome P-450 levels, EPN-detoxication, and p-nitroanisole O-demethylation activities were very low in young adult insects but increased steadily reaching a peak at about 100 days in fat body and at about 90 days in midgut and hindgut. The activities then declined rapidly reaching levels of young insects at about 130 to 140 days of age. NADPH-NT-reductase activity was high in young insects and declined during the first few weeks of adult life. This activity too showed a peak at about …

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 …

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 …

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 …}

Greenhouse Production And Marketing Of Petunia, W. Theron Hansen Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was performed during a three year period, 1969-1971. The first year the writer evaluated containers, soil mixtures, planting dates, fertilizers, and temperatures for optimum petunia production. The data collected aided in selecting the best greenhouse procedures for future studies. The second year three bedding plant varieties were used for further evaluate containers and soil mixtures using direct seeding and transplanting and watering continuously or watering as needed.

As a result of the first two year's studies, a liquid fertilizer (10-5-5), an average temperature of 75 F, Jiffy-7 peat pellets, plants not receiving continuous water program was used for …

The Relationship Between Matric Water And Related Physiological Properties, Hussain Ali Al-Saadi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Matric water was measured as the water retained by plant material on a pressure membrane or ultra filter after equilibration under 20 bars nitrogen gas pressure and the removal of free water. At increasing pressures lesser amounts of water are held by matric or colloidal surface forces. Twenty bars pressure, supplied by cylinder nitrogen for 48 hours, was used in this study. Matric water was expressed as a percent of either (a) the dry weight or (b) the original water content. Plant material was oven dried, ground, and then saturated with water prior to the determination.

The matric water values …

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 …

Canopy Structure And Phenology Of Alpine Tundra Vegetation, Marcee Fareed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An inclined point frame was used to measure leaf area indices in an alpine tundra Kobresia stand and Deschampsia meadow on Niwot Ridge, Colorado. Measurements were made throughout the summer of 1971 at various heights in the canopy and for each species in the two communities. Maximum leaf area indices of 2.2 and 2.0 occurred in the Kobresia and Deschampsia sites, respectively. The Kobresia site was characterized by a single dominant species, Kobresia myosuroides, and a predominance of vegetation within 2.5 cm of mean ground level. The Deschampsia site had no single dominant species. The region of maximum foliage …

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 …

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.

Evaluating Effectiveness Of Using Business Education Department Prepared Video Tapes In The Teaching Of Intermediate Typewriting At Utah State University, William C. Lauer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to compare the relative effectiveness of teaching intermediate typewriting at Utah State University during the Spring and Fall Quarters, 1971, utilizing a system incorporating prepared video tapes with the conventional teacher presentation method.

There were 60 experimental and 60 control students used in the experiment. Those students in the experimental group received all their instruction via prepared video tapes while the control group received all their instruction in the conventional teacher presentation.

The final measure utilized for comparing learning programs in the two groups was student performance in the following areas: straight copy timed …

The Influence Of Ethnic Background, Religion, Education, And Income Upon Family Planning Behavior And Attitudes Of Certain Married Couples At Utah State University, Gustavo Loza-Montenegro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this study was to determine whether certain socio-cultural factors tend to influence family planning behavior and attitudes of certain married couples at Utah State University. Socio-cultural factors considered in this study were: ethnic background, religious preference, level of education, and income. These socio-cultural factors (independent variables) were examined from the standpoint of their influence upon one or more of the following dependent variables: the use or non-use of family planning, the extent to which family planning is used, attitude toward the most important source of information for family planning, and attitude regarding the single method which is …

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 …

A Reliability Measurement Of The Transactional Analysis Checklist, Robert B. Kahn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the study was to measure the reliability of a checklist created and standardized for the study. The development of the checklist, referred to in the study as the Transactional Analysis Checklist (TAC), finds its basis in Transactional Analysis theory.

The literature available pertaining to Transactional Analysis was reviewed. No literature, prior to the study, existed which directed itself specifically to the examination of an instrument that could be used during the diagnostic phase of treatment.by .Transactional Analysts. The lack of literature was a partial motivator for the study. It was suggested that informally constructed devices are being …

Limitation Studies Of Seed Set In The Onion Allium Cepa L. (Liliaceae), Nizar Shukri Shasha'a

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two field experiments were carried out. In the first experiment, 13 variables were studied for 3 inbred groups as influenced by genetic differences, source of pollen, soil moisture, fertilizers, and size of bulbs. Path-coefficient analysis was made of various insect pollinators influencing seed yield in different inbreds, and of components of seed production in all inbreds together. In the second experiment, 4 variables were studied for one male-sterile inbred and one male-fertile inbred as influenced by soil moisture and fertilizers.

Genetic differences among inbreds were the most important source of variation in seed yields. This points out that a major …

Replication: A Teaching Technique And Its Impact On Student Open-Closedmindedness, Dale H. Decker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The problem for the study was the lack of research on the effect of the empirical replication technique on student closed-mindedness. The replication technique requires the student to repeat, or replicate, studies originally conducted by social scientists. In this sense, replication is roughly analogous for the social sciences to what laboratory experiments are for the natural sciences. Additionally, the relationship between college student adjustment-maladjustment and open-closed-mindedness were explored while controlling for sex and academic achievement.

The control group (N=61) attended two lectures and a discussion section per week which dealt with introductory social science materials. The experimental group (N=85) was …

Stimulus Manipulation In Articulation Therapy With A Hearing Impaired Child, Walter Eugene White

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Severely hearing impaired individuals typically exhibit speech that is unintelligible and systematic instruction in speech has not effectively alleviated all of the misarticulations found in the speech of these individuals. Behavior modification is a promising development which has meaningful application to the modification of defective articulation by hearing impaired children.

The purpose of this study was to as certain the feasibility of implementing a specific program of stimulus manipulation to alter the articulation of the |TS| phoneme as uttered by one severely hearing impaired individual. The training program was structured in a sequence of four operant training conditions. Pre-training tests, …

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 …

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 …

A Comparative Study Of Drug Abuse In Senior Classes Of Logan High School And Tooele High School, Hal R. Hale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the study was to determine the incidence of drug abuse among seniors of Tooele High School, Tooele, Utah, and Logan High School, Logan, Utah. The following sub-problems were investigated as a part of this study.

1. The relationship of the incidence of abuse between males and females.

2. The possible influence a university may have upon a neighboring high school, in reference to drug abuse.

The data for the purpose of analysis was obtained from answers to the questions used in the questionnaire. The questionnaire consisted of 47 questions. The number of participants included 201 high school …

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 …

Population Ecology Of Uinta Ground Squirrels, Norman A. Slade

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The behavior and ecology of Uinta ground squirrels (Spermophilus armatus) at the Utah State University Forestry Field Station northeast of Logan, Utah were studied from 1964-1971 to determine the role of behavior in population regulation. From 1965 to 1968, data were collected to establish population norms. In 1968, the population density was reduced experimentally to help elucidate regulatory processes. This paper compares the dynamics of the population before and after the population reduction.

Before the density reduction, juvenile survival was lower than that of yearlings and adults. The disappearance of juveniles was associated with their tendency to disperse …

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 …

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 …

An Examination Of The Inorganic Nitrogen Status Of A Soil Of The Alaskan Coastal Tundra Plain, Norton R. Munn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This experiment was designed to measure in situ concentrations of NH₄⁺ and NO₃^--N in a soil of the arctic coastal tundra plain, to determine if nitrification was taking place in this soil and to determine if the vascular plants growing in this soil could assimilate NH₄⁺-N.

The extractable NH₄⁺-N concentration was approximately 40 μg/g in the 0₁ horizon and 10 μg/g in the 0₂ horizon. The NO₃^--N concentration was approximately 5 μg/g in the 0¹ horizon and 4 μg/g in the 0_{2 …}

Continuous Flow Analysis Of Non-Casein Protein In Milk, Robert Steven White

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Technicon AutoAnalyzer II was evaluated for automatic quantitation of non-casein protein (NCP) in milk. The Lowry method for colorimetric measurement of proteins was adapted to the automated method and found to be accurate in the determination of non-casein protein in milk. The automated Lowry method obeyed Beer's law. Casein content was calculated by difference between total protein determined by infrared milk analysis (IRMA) and non-casein protein. In the analysis of twenty-five replicate milk samples, the standard deviation was 0.32 and the coefficient of variability was 0.90. The casein content as a percentage of total protein in the milk of …