Life Sciences Commons^™

Selected Insecticides In The Control Of Invertebrates Possibly Associated With Avian Botulism, J. Larry Haddock

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Avian botulism or ''western duck sickness" has long been a major problem on duck marshes in the western part of the United States. This has been demonstrated to result from the ingestion of products of metabolism of bacterial cells of Clostridium botulinum type C. These products when ingested by waterfowl act as neurotoxins (Coburn, 1942). Studies have shown that many animal tissues are readily utilized as culture media by Cl. botulinum type C (Bell et al., 1955).

Since 1955 investigations have indicated a close relation between the occurrence of avian botulism and invertebrate population levels. It is thought that when …

A Genetic Study Of Linkage And Inheritance In Barley, Jerald Dean Oldham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With the exception of corn, barley has probably been used more than any other cultivated plant in genetic studies. It was one of several plants with which Erich von Tschermak-Seysenegg was working when he discovered Mendel's paper.

Barley is excellent material for use in genetic studies. It is adapted to many environments and has a large number of contrasting characters. Large populations can be grown on a small area of land in one season. It is a diploid with seven chromosome pairs. Each of these seven chromosome pairs can be identified cytologically.

There are seven linkage groups corresponding to the …

A Comparison Of Cock Pheasant Harvests Among Areas Having Different Hunting Pressures, Cache County, Utah, James C. Bartonek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parsons (1953) found Utah's posted hunting unit system regulated hunting pressures over much of the state's pheasant range. He found inequalities of hunting pressure among the posted hunting units because of their individualistic methods used to determine the number of hunting permits to be sold. Utah State Department of Fish and Game personnel recommend the number of permits to be sold by the hunting unit; but often, the hunting unit officers use the desired level of hunting pressure, size of cock harvest, and revenue from permit sales as decisive factors. By regulating hunting pressure on their own lands the posted …

Forage Yield And Plant Stand Intensity Of Nine Alfalfa Varieties In Relation To Nine Rates Of Seeding And Bacterial Wilt Resistance, Hamid Auda

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In growing alfalfa it is important to obtain a good initial stand. However, it is difficult to predict the exact amount of seed necessary to insure a good stand.

There are about 220,000 seeds in 1 pound of alfalfa seed, or enough for four to five seeds per square foot at the rate of 1 pound of seed per acre. If every seed should grow, 2 to 3 pounds of seed per acre would be sufficient for a good stand.

However, there are many hazards. Some seeds are not viable, and others are planted too deep or too shallow to …

An Economic Study Of Alternative Methods Of Obtaining Dairy Herd Replacements In Northern Utah, 1961, J'Wayne Mcarthur

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Dairying ranked second in producing farm income in the state of Utah in 1929 (II). Twenty-two and two tenths percent of cash receipts from the sale of agricultural products came from dairying. Beef enterprises were the only larger source of farm income in the state, with 24.7 per cent of the total cash receipts. Because of the importance of dairying in the state, much work has been done to provide dairymen with information that will enable them to obtain a higher net return from dairying.

The Cost Of Owning And Operating Farm Power And Machinery Used In Tillage Operations On Diversified Farms In Selected Areas Of Utah, 1960, Clynn Phillips

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A current problem facing farmers is, how much should they mechanize their farm perations? As the relative price and productivity of factors change farmers usually have to adjust their operations to assure maximum profits. Technological advances often change the relative productiveness and the price of machinery. These changes have caused the progressive farmer to continually review his farm organization and make adjustments in levels of factor use. If he is to produce at maximum profits it is necessary that his machinery investment be in proper adjustment with other resources.

Experiments On The Origin And Nature Of A Zinc Deficiency Of Field Beans On A Portneuf Soil As Determined By The Application Of Zinc 65, Edgar Dale De Remer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In a few instances an agricultural problem lend itself well to research into some of the more basic aspects of a problem as well as to research to determine the exact nature of the problem ad to prescribe a cure. Such a problem was found by the author to exist on a soil of the Twin Falls, Idaho area. Besides making an attempt to ascertain the exact nature of the problem, an experiment was set up in an attempt to understand more about the mechanism responsible for the problem.

Effect Of Sweeteners On The Acceptability Of Selected Processed Fruits, Richard Lee Mclaughlin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1959 Abbott Laboratories estimated (3) that every year 60 million persons go on controlled diets. Of these about 34 million have serious obesity problems, 3 million are diabetics and the rest have disorders that demand strict dietary measures.

The Effect Of Feeding Fluoride On Some Enzymes Of Bovine Tissues, Prasertsri Sitachitt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fluorides are usually found in nature as constituents of soils, water, and the tissues of animals. Fluorite or fluorspar (CaF₂), cryolite (Na₃AlF₆), apatite (3 Ca₃ (PO₄)₂ CaF₂) and sedimentary phosphate rocks are among the principle minerals containing fluorides found in nature. Traces of fluorides also occur in domestic water supplies in nature and also by induction in vegetation and animal feeds. From 0.5 ppm to 1.5 ppm of fluorides in drinking water is the range found to be beneficial in reducing the incidence of tooth decay in man. …

A Genetic Investigation Of A Yellow Plant Color Characteristic In Winter Wheat, John Oscar Evans

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective in wheat hybridization primarily is to obtain new varieties which are of a greater agronomic value than existing varieties. Frequently, however, crosses which obviously will not produce superior commercial types are made and studied in order to obtain genetic information which may be useful to the breeder. This latter phase of breeding, i.e., the accumulation of genetic information, provides the basis for this study.

Quality Evaluation Of Certain Fruit Jellies And Syrups Prepared With Sucrose, Sorbitol, And Synthetic Sweeteners, Sandra Louise Day

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Body weight is fast becoming the major health problem in the United States. Recent estimates of the number of weight conscious people in the United States are now up to 75 million. One year ago the estimate of overweight individuals was 60 million Americans who were overweight or should be concerned about watching their weight. There are also two million known diabetics who must control their disease and body weight by a restricted caloric intake.

An Evaluation Of Antibiotics Upon Selected Dairy Organisms, Roy Brog

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was designed to answer a three-fold purpose. Primarily, it has endeavored to measure the inhibitory effect of three antibiotics (potassium pencillin, dihydrostreptomycin, and oxytetracycline) on lactic acid producing organisms. The lactic acid-producing organisms include Streptococcus lactis, Streptococcus thermophilis, and Lactobacillus bulgaricus.

The determination of an effective dose of a given antibiotic which will inhibit 50 percent of the lactic acid-producing organism (E.D.₅₀) will be established. A 50 percent cut in acid development will certainly lead to an inferior product.

The secondary purpose has related to the detection of inhibitory substances (antibiotics) in milk. What is …

A Study Of The Use Of The Hydrogen Peroxide-Catalase Treatment Of Milk In The Manufacture Of A Reduced Fat, Cheddar-Like Cheese, Lamar John Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nutritionists, the medical profession, and the public in general have become increasingly interested in low fat food products. Cheddar cheese, as it is now made, has a high caloric value and therefore may be discriminated against in some diets. The production of a reduced fat cheddar-like cheese would be of importance to the cheese industry by providing a reduced fat, high protein product.

The chemical nature of the casein furnishes the foundation for the body and texture in cheese. The body and texture of typical cheddar cheese is influenced principally by its fat and moisture content.

The use of hydrogen …

A Study Of The Effects Of Acidity On Shelf Life And Type Of Spoilage In Market Milk, Jagannath M. Kudale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The addition of the Streptococcus lactis culture in the pasteurized milk was studied, in an attempt to find the effects of the culture in prolonging shelf life of the milk. Various concentrations of the culture were tried to find the optimum concentration that would give favorable effect on keeping quality of the milk. It was found that the addition of Streptococcus lactis culture at the rate of 0.0001 percent has shown promising effects in prolonging shelf life of the milk at the storage temperature of 40 F.

In addition to the above study, effects of added acid in the pasteurized …

A Study Of A Bacterial Cause Of The Late Gas Defect In Cheddar Cheese, Rulon A. Chappell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

More of the manufacturing milk purchased from Utah's dairy farms is used for the production of cheese than for any other product. Approximately eleven and one-half million pounds of cheese were produced in Utah in 1959, of which more than half was cheddar. Many problems are encountered in the production of A-grade cheddar cheese. One of the most important causes of the reduction in grade is the late gas defect which accounts for about 50 percent of the cheese grading below A-grade. To increase the percentage of A-grade cheddar cheese in Utah, the late gas problem should be solved. The …

Income Adjustments From Fee And Permit Changes On Utah Cattle Ranches Using Public Ranges Yearlong, C. Kerry Gee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the boundaries of Utah are approximately 52.7 million acres of land. About 41 million acres are rangeland, of which 73 percent is federally owned and 5 percent state owned (6).¹ The portion owned by the Federal government is administered by the Bureau of Land Management (BLM) and the Forest Service. Most of this land is either arid or mountainous and has been used mainly for grazing in the past. IT has other uses, however, such as mining, forestry, recreation, and watersheds. Due to recent increases in population, personal income, shorter work weeks, and improved transportation facilities, these alternatives …

The Influence Of Internal Moisture Deficit On Translocation, Sven Egenolf Wihrheim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The reduced growth of plants under conditions of moisture stress has been attributed to reduced turgor necessary for cell enlargement and to reduced photosynthesis often found in wilted or moisture stressed plants. Reduced translocation is rarely mentioned as a factor in reduced plant growth under limited moisture. This is rather surprising, since the Münch pressure flow hypothesis would require a turgor pressure gradient between leaves and receiving organs before any translocation of sugars could occur. Such a turgor pressure gradient would be reduced with increasing internal moisture deficit and would appear to become zero when the leaves wilt. If this …

Ecology Of Spring Fed Salt-Marshes, Eric George Bolen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Any marsh is a distinctive land-form of varied interest. To the agriculturist it is wasteland to be reclaimed; to the naturalist, a habitat of aesthetic value. To the ecologist, however, a marsh represents a complexity of vegetation under the influences of many and often inseparable factors. It becomes a place of challenging study.

The Study Of The Effect Of Various Methods Of Harvesting And Curing On The Color And Viability Of Lima Bean Seed, S. G. Date

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many seedsmen have observed that lima bean seed of a variety like Early Thorogreen, which has green cotyledons, often fades in color during harvesting. This fading of color is known as bleaching. A variety which has green cotyledon and hence green seed, should retain this green color during harvest. Bleached seeds are likely to emerge slowly when planted. Also the final field stand from a planting of bleached seed is likely to be poor.

The Effect Of Fluoride On Glucose Catabolism In Plant Leaves, Cleon W. Ross

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the last few years many studies concerning the effects of fluoride on plants have been made. Several of the experiments have been related to its influence upon respiration of various plant tissues. The effect on respiration appears to be complex.

Economics Of Wool Marketing In Utah, E. Jay Berry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since the beginning of history the wool of sheep has been used by the human race. Its chief use has been and still is for clothing. Also, it is widely used for blankets, upholstery, carpets, and numerous other products.

The wool industry is important to the state of Utah, which was the sixth largest producing state in the United States in 1958. Wool growers in Utah received approximately $7,897,000 in sales proceeds and government payments for wool sold during the 1958 marketing year (12).¹

An Inheritance And Linkage Study Of Barley With Special Emphasis On Purple Pigmentation Of The Auricle, Devon Lyle Doney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

New and better adapted varieties of crop plants have resulted from the application of the principles of genetics. Fundamental research in the field of barley genetics has helped the plant breeder in developing better varieties for specific uses and adaptability.

Barley is one of the best cultivated crop plants for making genetic studies. It has a wide range of adaptability, exhibits a host of contrasting genetic characters, is a simple diploid with only seven pairs of chromosomes, and all the cultivated species are inter-fertile.

The mode of inheritance of nearly 200 characters has been studied, many of whose genes have …

The Life Cycle And Pathogenicity Of Eimeria Auburnensis, Wayne Norris Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Coccidiosis in cattle is caused by microscopic one-celled sporozoa belonging to the order Coccidia and the genus Eimeria. Coccidiosis is a common disease of young calves that weakens or kills them, but the disease also occurs in older animals. Eleven species have been reported in cattle of the U.S.A.(Davis and Bowman, 1956). Of this number only two species, Eimeria bovis(Hammond et al., 1946) and Eimeria zurnii(Davis and Bowman, 1957) have been proven pathogenic for cattle, but except for Eimeria alabamensis(Davis et al., 1955) no experimental work has been done on other species.

A Comparison Of The Salt Hardiness Of Barley, Petunia, And Tomato When Grown In Saline And Nonsaline Substrates, James Louis Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The excessive accumulation of salt in the root zone of plants is a problem which is widespread in area, increasing in magnitude, and limiting in its effect upon productivity. Accumulation of salt in the rhizosphere has an effect upon moisture availability for plant use, the nutritional balance of the essential elements, and causes a reduction in plant growth with toxicity often resulting. When plants grow on substrates high in salt, the salt content of the plant also increases. This uptake of salt often results in changes in the morphology of the plant. Accumulation of salt within the plant cells interferes …

Deviations In Serum Proteins Associated With Eimeria Bovis Infections In Calves And Some Related Immune Reactions, Paul R. Fitzgerald

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bovine coccidiosis is a serious threat to the economy of the cattle industry in the United States. In 1954 the United States Department of Agriculture reported that over $10,000,000 was lost annually as a result of mortality and morbidity in cattle due to this parasite (1). These losses alone amounted to more than one fourth of the total loss in cattle due to parasitism.

Iron Chlorosis In Higher Plants As Related To The Organic Acid Content, Lucia Yulin Su

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Chlorosis, which is associated with a reduction in the chlorophyll content of leaves, is a major problem in the growing of deciduous fruit trees and some field crops on Western soils (16). For the deciduous fruit and field crops the predominant chlorosis pattern is the iron deficiency type which on Western soils is associated with high bicarbonate concentration in the soil.

Embryo Sac Development Of An Intergeneric Hybrid Between Lycopersicon Esculentum Mill. And Solanum Lycopersicoides Dun., Ray William Bills

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the search for sources of resistance to the curly top virus disease of tomatoes (Lycopersicon esculentum), it was found by some investigators that certain species of the genus Solanum express an apparent immunity to the disease. It would be desirable to transfer the resistance expressed by the genus Solanum into the genus Lycopersicon. The major problem to the plant breeder becomes one of obtaining a compatible F₁ hybrid between the Lycopersicon and Solanum genera through which genes controlling resistance may be transfered to Lycopersicon. In 1951, C. M. Rick reported a successful cross between …

The Effects Of Certain Environmental And Biological Factors On Rally Calling In The Chukar Partridge, H. Warrington Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Naturalists for many years have known that birds sing most at dawn and at dusk, but to which of many physical variables they are responding has not been completely determined. This problem has taken on importance in the field of wildlife management because calling rate has been used as an index of abundance for numerous game birds, namely the Pheasant, Phasianus colchicus (Kimball, 1949); the Mourning Dove, Zenaidura macroura (McClure, 1939); the Bobwhite Quail, Colinus virginianus (Bennitt, 1951; Rosene, 1957): and the Woodcock, Philohela minor (Pitelka, 1943).

An Introduction To The Ethology Of The Uinta Ground Squirrel (Citellus Armatus), David F. Balph

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study describes behavior of the Uinta ground squirrel (Citellus armatus) in a free-living population. Its objective is to provide basic behavioral information on a small mammal which can fill in part of the gaps in our knowledge of behavior and social organization of the vertebrates. This would contribute to the long-term goal of viewing the progressive evolutionary changes in behavior from lower forms to man.

Essential Amino Acid Composition Of A Balanced Chick Diet, Donald Christensen Dobson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The scientific balancing of diets has resulted in a series of studies to determine a standard for amino acid adequacy of a chick ration. These studies have shown that some amino acids are required in a chick diet more than others; they are termed "essential amino acids". Proteins used in formulating rations vary widely in essential amino acid content. Because of this variation, it can no longer be said that a diet with so much protein (N x 6.25) is adequate to meet the chick's need for optimum performance. Many papers have been published showing the results of experiments for …