Life Sciences Commons^™

A Review Of Plant Propagation Methods, Somsong Aritajat

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to consider how the rooting of cuttings may be affected by such methods and factors as: type of cutting, time of year when cuttings are best taken, differences between individual species, use of chemicals for the treatment of cuttings, rooting media, and the care of cuttings in the propagation beds.

In the past 35 years scientists have done considerable experimenting with the application of organic chemicals on the roots, stems and leaves of various plants. These organic chemicals have come to be known as "plant hormones" or "plant regulators." They have proved to be …

Behavior Patterns Of The Adult Alfalfa Weevil In Cache Valley, Utah, J. Wanless Southwick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The alfalfa weevil, Hypera postica (Gyllenhal), was first found in the United States in Salt Lake City, Utah, during 1904 (Titus, 1910b). It spread form this point of original introduction and partially infested Cache Valley by 1912 (Titus, 1913).

The Economic Value Of Forage For Livestock On Public And Private Ranges In Utah, Mardell D. Topham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The United States Government controls about 359 million acres of land in the 11 Western States. This vast acreage produces recreation for vacationers, timber for lumbermen, water for city and rural consumption, forage for livestock and wildlife, and minerals for miners. In many cases, the users of these products are competing and are clamoring for a large share of this land. Consequently, land use is continually changing. Since 1941, the amount of timber cut has tripled, recreation has doubled, watersheds now yield a better quality of water (Clawson, 1957), forage for wildlife has increased but forage for livestock use has …

An Investigation Of Certain Linkage Relationships In Barley, Parichehr Ahmadian Tehrani

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Barley is one of the world's most important food and feed crops. It is adapted to a wide range of environments. According to Harlan and Martini (1936) barley is grown from north of the Artic Circle to the sands of the Sahara, and from the slopes of Mt. Everest to the lower delta of the Nile.

Considerable progress has been made in its improvement through plant breeding. Barley is one of the best cultivated crop plants for use in genetic studies. It is a diploid plant from the family Gramineae with seven pairs of chromosomes. The cultivated species are interfertile …

An Ecological Study Of Ditylenchus Dipsaci (Kuhn) Filipjev. In A Field Of Alfalfa, Shu-Ten Tseng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ditylenchus dipsaci (Kuhn) Filipjev. is one of the most destructive nematodes to crop plants. It attacks and damages more than 300 species of cultivated and uncultivated plants. The nematode can be differentiated into many races, each of them having a preference for a group or even a single plant species.

Alfalfa stem nematode is one of the races in this species which attacks the above ground portion of alfalfa but does not infest the roots. Larvae of this nematode may migrate from the plant tissue to soil in moist conditions. These nematodes migrate actively to nearby plants or are carried …

The Effect Of Decomposing Organic Matter On Zinc Level In Soil And Plants, Kamilia Shoukry Mohamed Shoukry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

That proportion of the total zinc (Zn) in the soil that is available to plants is variable, and little is known about the various forms of Zn or even the extent to which it occurs. Because of the complexity of the problem, most workers have approached the problem of availability of Zn to plants from the opposite point of view, that is, the forms in which the added or available Zn becomes unavailable.

Considerations Influencing Utah Farmers In Their Decisions To Produce Sugar Beets, Surjit Singh Sidhu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sugar has been an important commodity down through the ages. In the present day world, there is hardly any corner of the world where sugar is not consumed in one form or another.

Wide variation in per capita consumption of sugar exists among nations. Sugar consumption appears to be related to income level. Sugar in the United States is considered an item of necessity, and its consumption is relatively stable. This is evidenced by low price and income elasticities of demand for sugar which were -0.28 and 0.27 respectively for the period 1921-1956 (1). Consumers thus consume about the same …

Some Economic Effects Of Irrigation Water Pumping From A Declining Water Table In The Milford Area Of Utah, Duane R. Price

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Surface water is found in very limited quantities in most of southwestern Utah. In order to compensate for a deficit of surface water it has been necessary to use underground water where it is possible and profitable to do so. The Milford pumping area in southwestern Utah is an area where expanded irrigated agriculture has been established by pumping of ground water. It is one of four major pumping areas in the state of Utah.

An Evaluation Of Pricing Practices And Their Effect On The Egg Industry In Utah, Wilbur N. Sherman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The decade from 1953 to 1963 was one of drastic change for the egg industry in Utah. A study conducted at Utah State University shows that in 1952, slightly more than 40 percent of local egg production was s old in distant markets while in 1964, import data gathered from egg handlers in the State indicate that 20 to 25 percent of the eggs consumed in Utah were imported.

Saponin Content And Some Pod And Blossom Characteristics Of Alfalfa As Related To Seed Infestation By The Alfalfa Seed Chalcid, Ronald D. Morse

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The alfalfa seed chalcid, Bruchophagus ruddi Guss., is a jet-black hymenopteran wasp. The destructive nature of this pest has been recognized since the latter part of the nineteenth century. Every year thousands of acres of alfalfa seed are destroyed, with infestation reaching as high as 8 5 percent in some areas. In Utah the chalcid annually ruins from 5 to 25 percent of the alfalfa seed. Much of this damage goes unnoticed, as infested seed is commonly blown out in the trash during harvesting and cleaning operations . The extent of damage is not restricted to the United States. Wherever …

Development Of Recreational Use Patterns At Flaming Gorge Reservoir, 1963-1965, John Guthrie Hewston

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three major occurrences in recent years have emphasized a need for new data concerning reservoir-based recreation patterns. These occurrences were: (1) the increased rate of construction of new, large reservoirs by federal agencies; (2) the increasing demand for recreation space and fishing water; and (3) the establishment of large national recreation areas around federal reservoirs.

The Complex Formation Of Silver Ion With Ribonucleic Acid, Guanosine, Inosine And Related Compounds And Peroxidase-Like Activity Of A Haemundecapeptide Prepared From Horse Heart Cytochrome C, José Angel Reinosa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of nucleic acids in plant and animal cells as carriers of genetic information and as protein biosynthesis agents is well recognized. It is also known that nucleic acid is a component of all viruses.

Takahashi (45) and Fraenkel-Conrat (16) demonstrated that the protein component of tobacco mosaic virus is non-infectious to the host plant, although it is identical to the original virus morphologically. The virus ribonucleic acid (RNA) alone was infectious, however.

Deoxyribonucleic acid (DNA), which is present in chromosomes, displays a very specific function. The chromosome long has been accepted as the carrier of the hereditary unit, …

The Inhibition Of Water Uptake In Sugar Beet Roots By Ammonia, Darrel Marshall Stuart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Various ammonium salts, urea, aqua ammonia, and anhydrous ammonia are important sources of nitrogen for the fertilization of agricultural crops. While ammonia and its compounds are useful as fertilizers, they can be, and often are, toxic to many plants (Willis and Rankin, 1930; Stout and Tolman, 1941; Raleigh, 1942; Stoll, 1954; Lorenz, 1955; Grogan and Zink, 1956; Allen, 1962; Cooke, 1962; Allred, 1963; Court et al, 1964; Hood and Ensminger, 1964). There are also products which have been designed to retard the oxidation of ammonia and its compounds (Go ring, 1962). It is therefore important that the effects of ammonia …

Physio-Chemical Changes In Relation To The Rest Period Of Peach And Apricot Trees, Hussein Ibrahim El-Mansy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many plants require exposure to low temperature for a certain period during each year. This was determined more than a century ago. Understanding this phenomenon, known as the rest period, is part of a larger problem of understanding the factors which determine the ability of an organism to grow. The property of rest is ultimately a property of the actively growing cells, rather than that of the cells involved with protection and support.

A Study Of The Factors Influencing The Synthesis Of Tobacco Mosaic Viral Rna In A Partially Purified Synthesizing System, Agnes P. Fok

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research on biosynthesis of tobacco mosaic virus (TMV) ribonucleic acid (RNA) in vitro has been reported by Cochran, et al; Karasek and Schramm; Kim and Wildman; Cornuet and Astier; and Tongur and Baland in. It has been postulated that the replication of a number of viruses containing single-stranded RNA is accompanied by the formation of a virus-specific double-stranded helical RNA, the replicative form. This has been demonstrated both for animal and bacterial viruses including MS2. The double helical structure of purified replicative form of MS2 was established by X-ray diffraction studies. One of the strands was shown to be a …

Potentiometric Measurement Of Sodium Chloride In Cheese, Seyed-Hossein Salimi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The salt content of cheese is usually determined by the American Dairy Science Association (ADSA) (26) procedure. This method is based upon the determination of chloride in the sample, and results are expressed as per cent sodium chloride. The presence of chlorides in cheese other than sodium chloride would introduce error in the results. However, in practice this is not serious except where relatively large amounts of CaCl₂ are added to the cheese milk.

In determining the NaCl in cheese, one would be as justiied in basing his results on sodium analysis as on chloride analysis. An exception would …

A Two Year Course Outline In Quantity Foods For Intermountain High School Girls, June C. Larson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Bureau of Indian Affairs has recently completed or is now in the process of building 19 new grade schools on the Navajo reservation. Some of these schools are boarding schools, and some are day schools, but each new school needs school lunch personnel. To meet this need intermountain School added to their curriculum a course in Quantity Foods to be given to Junior and Senior High School girls as a two year vocation. This necessitated the development of a 2 year course outline for the 2 year Quantity Food class, which gave the girls 4 hours daily practical training …

Neutral 17-Ketosteroid And 17, 21-Dihydroxy-20-Ketosteroid Excretion In Urine Of University Women During The Menstrual Cycle, Shao Shen Yam

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the last few years, much research has been done on lipid metabolism because of the possible involvement of lipids in atherosclerosis and coronary heart disease. These diseases appear to be related to abnormalities in lipid metabolism. Since sex differences have been noted in lipid metabolism, the role of steroid hormones has been under investigation in a number of laboratories. Coronary heart disease occurs only rarely in women during the reproductive phase. In men, the administration of estrogens results in a decreased serum cholesterol level while androgens tend to increase circulating cholesterol.

Experiments on rats and chickens have indicated that …

Breeding And Roasting Temperature As Related To Beef Tenderness And Other Quality Factors, Ruth Ann B. Jenson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

According to the 1964 census the production and sale of livestock provided a major source of income in the state of Utah. Twenty-three of the state's twenty-nine counties received more than 40 percent of their total farming income from livestock sales in 1959. According to Taylor (1965) this is expected to increase even more. In studying the economic sources within Utah, it becomes evident that many of the state's farmers and ranchers depend heavily on the sale of livestock for their livelihood. Upon observing this fact, Taylor (1965) states that farm income will depend just as heavily on the sale …

Some Biochemical Changes Occurring In Tomato Fruit Ripened By Several Treatments, Arthur A. Boe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ripening of fruit, aside from its economic consequence, is of importance in the study of the development and physiology of plants. The fruit, being the reproductive organ of the plant, is fundamentally necessary for the continuation of the species. The production of fruit is also of major economic importance.

The fruit is nurtured, not only by its own ability when young to produce carbohydrates by photosynthesis, but also by the translocation of sugar and other compounds produced in the leaves. While young, the fruit appears to function as the modified leaf that it is believed to be. It is …

Cholesterol Levels In Serum And 5Β – Pregnane – 3Α,20Α - Diol In Urine Of University Students, Gertrude Kuei-Shu Chiang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since there is a high incidence of coronary heart disease in humans of middle-age and older in the United States, and the mortality of this disease is still increasing, a great deal of research has been done in this field. Although many theories have been formulated concerning the cause of atherosclerosis, it is a very complex disease, and appears to be influenced by many factors. Disturbed lipid metabolism is widely believed to be involved in the development of the vascular lesions found in arteriosclerosis, although the nature and origin of the disturbance is unknown. The mechanism for the elevation of …

A Comparison Of Tests Used In The Selection Of Milk, Roger L. Stephens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The selection of milk has for many years been based upon the use of bacteriological tests such as the standard plate count, methylene blue, and resazurin tests. Such tests demoted the numbers of bacteria in milk and thus were well accepted as a close correlation of sanitary practices on the farm.

However, improvements in equipment, cleaning procedures, sanitizers and handling methods have greatly improved milk quality over the past decade. The farm bulk tank is a much more efficient system of cooling use in many areas. However, its very efficiency in cooling milk poses many new problems for those engaged …

Studies Of Peronspora Trifoliorum Debary Cause Of Downy Mildew Of Alfalfa, Sheldon B. Waite

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Downy mildew of alfalfa (caused by Peronospora trifoliorum d By) was found to be epidemic on susceptible varieties of alfalfa in northern Utah during 1965. The increase in the amount of downy mildew present was due to the more abundant rainfall and cooler than normal temperatures which prevailed during the summer months of 1965 (Environmental Science Services Administration, 1965). The author observed many of the highly susceptible varieties of alfalfa had 25-30 percent of their leaflets infected with the downy mildew fungus. Because of the epidemic developments of alfalfa downy mildew, an investigation was undertaken to explore the following questions …

Susceptibility Of Selected Alfalfa Clones To Lygus Bugs In Relationship To Seed Production, Charles G. Summers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah ranks as one of the major producers of alfalfa seed in the nation. In 1964, 6.02 million pounds of cleaned seed were produced in the state. This resulted in an income of 1.7 million dollars to Utah seed producers for that year (Agricultural Statistics, 1965).

The Influence Of Clipping And Moisture Stress On Translocation In Crested Wheatgrass, James Miller Mayo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Water movement in soils containing moisture below field capacity is extremely slow, thus requiring a continuous expansion of the plant root system to meet the transpiration demands placed on the plant (20, 21, 12, 19). It has been shown that internal moisture deficits result in reduced growth, and often death of the plant (22, 28, 25, 29, 34). Thus a healthy and continuously expanding root system may be necessary for good plant growth.

A Cytological Study Of Germinating Aeciospores In The Cronartium Coleosporioides Complex, John A. Christenson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Peridermium harknessii Moore, causal agent of western gall rust, is responsible for deformation, cull and death of pine. In the West it is most serious on lodgepole and ponderosa pines. Seedlings and mature trees may be seriously attacked (Peterson, 1960). Gall rust is easily recognized by its branch galls and trunk cankers. Interest in the disease has fluctuated, but it is considered important enough that government monies support research on the disease in both the United States and Canada.

Ionic And Osmotic Effects On Growth, Transpiration, And Osmotic Pressure Of Salt Tolerant Plants, Don L. Chadwick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Salt tolerant plants have been the subject of considerable interest and study by scientists of arid regions. Ability of these plants to survive and grow in saline habitats has been attributed to such characteristics as: development of high osmotic pressures to counteract the soil moisture stresses, ability to utilize waters of high salinity, and possession of a protoplasm resistant to toxic ion accumulation.

An Evaluation Of Conservation Reserve Lands In Relation To Pheasant Production And Survival, Richard M. Bartmann

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ring-necked pheasant (Phasianus colchicus) is one of the most important upland game species over much of the nation. It is also one of the most difficult to effectively manage for the increasing hunter population. The high value of agricultural lands renders habitat improvement programs by state agencies a financial impossibility except on an extremely localized basis. Therefore, the primary pheasant management tool largely remains hunting season manipulation.

The federal government through various agricultural programs may have an influence upon pheasant habitat. Public Law 540 entitled "Agricultural Act of 1956," more commonly referred to as the "Soil Bank …

The Initiation Of Infection By Dna From Bacteriophage Lambda, Gerald D. Elseth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Deoxyribonucleic acid isolated from bacteriophage λ can infect Escherichia coli K12 in the presence of adsorbed helper phage (Kaiser and Hogness, 1960; Kaiser, 1962). The manner in which λ DNA enters the cell and the possible role of helper phage in the penetration process is still not clear. Kinetic studies conducted in this laboratory during the initial stages of infection by λ DNA demonstrate a requirement for helper function during the penetration of an infectious molecule. Further investigation into this problem is needed and was the major objective of this study.

Some Movements Of Black-Tailed Jackrabbits In Northern Utah, Donald H. Rusch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This work describes the extent and pattern of some black-tailed jackrabbit (Lepus californicus) movements and areas of activity in northern Utah and their relationship to sex and age, and season of the year.

Black-tailed jackrabbits are the most common lagomorphs in much of the western United States, particularly in that vegetational association described by McDougal (1908) as the sagebrush desert. Furthermore, Adams and Adams (1959) have suggested a correlation between sagebrush (Artemisia tridentata) incidence and jackrabbit density.

Farmers often regard this species as a liability because of its depredations on alfalfa (Medicago sativa), crested …