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Isolation An Characterization Of The Virus Of Epizootic Hemorrhagic Disease (Ehd) Of Deer, Hsing Kuei Liu Jan 1970

Isolation An Characterization Of The Virus Of Epizootic Hemorrhagic Disease (Ehd) Of Deer, Hsing Kuei Liu

Electronic Theses and Dissertations

The name "epizootic hemorrhagic disease" (EHD) of deer was first given by Shope et al. in 1955 because of the occurrence of the hemorrhagic disease in large epizootic_ proportions and because of its pathological features. It was also determined by them that the causative agent for the disease is a virus. Difficulties in studying the causative agent have been encountered because no host system other than the deer itself was available to support replication or detect the virus. However, isolation of the New Jersey strain of EHD virus was accomplished by Mettler et al. in 1962 using newborn mice and …

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An Investigation Of Eye-Movements When X-Height And Line Length Are Held Constant And Alphabet Length Is Prismatically Varied, Harold D. Perry Jan 1970

An Investigation Of Eye-Movements When X-Height And Line Length Are Held Constant And Alphabet Length Is Prismatically Varied, Harold D. Perry

Electronic Theses and Dissertations

The growing percentage· of type set by the "cold type" process combined with the growth of lithographic printing has increased the use of filmed typefaces. Machines now exist that can greatly reduce or enlarge a filmed typeface from its original size. A prism attachment on a process camera allows type to be altered in one dimension while holding the other constant. The effects on readability of such alterations are of importance to the printer. In a master's degree thesis study, Joseph W. Truex used a prism camera to simultaneously and direct! vary line length and alphabet length. He found no …

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Factors Influencing Asexual Spore Formation By Ceratocystis Ulmi, Richard J. Roster Jan 1970

Factors Influencing Asexual Spore Formation By Ceratocystis Ulmi, Richard J. Roster

Electronic Theses and Dissertations

Stock cultures of a pure strain of C. ulmi were obtained from the Plant Science Department at South Dakota State University. The inoculum was maintained on Potato Dextrose Agar (PDA) in petri dishes. On this medium, the fungus produced a grayish white rather sparse and appressed mycelium. Conidia were produced in heads on branched conidiophores. Quite often some sectoring was observed on PDA. Cultures producing coremia, obtained on 2% American elm shavings (on dry weight basis) plus bacteriological agar (8 g/1), were also used as an inoculum source. As is shown, this medium produced coremia and very little vegetative mycelium. …

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Optimum Design Of Transversely Loaded Concrete Beam, Sheng Lung Tsai Jan 1970

Optimum Design Of Transversely Loaded Concrete Beam, Sheng Lung Tsai

Electronic Theses and Dissertations

American agriculure has advanced considerably in recent years. These unprecedented advances result primarily from recent developments which have occurred in agriculture science and technology. Recent trends have been toward the feeding of more animals on fewer feedlots. The concentrating of large numbers of animals has undoubtedly increased the efficiency of animal producion in certain parts of the country. But the confinement of large numbers of animals has undoubtedly increased the efficiency of animal production in certain parts of the country. Because waste management has become a major operational problem, improved methods of handling, treatment, and disposal of animal wastes must …

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The Effect Of Harvesting And Storage Methods On Chemical Composition And In Vitro Digestibility Of First Cutting Alfalfa Hay, Perry A. Fales Jan 1970

The Effect Of Harvesting And Storage Methods On Chemical Composition And In Vitro Digestibility Of First Cutting Alfalfa Hay, Perry A. Fales

Electronic Theses and Dissertations

The importance of alfalfa hay in dairy cattle feeding is generally acknowledged. The reasons why alfalfa is used so extensively in dairy cattle rations are due to its high protein content, high acceptability by cattle, its wide ·area of adaptation, and high yields. A popular way of handling the forage is to put it up as hay. South Dakota produced 3,261,000 tons of alfalfa hay in 1968. There were 73 million tons of alfalfa hay produced in the United States during 1968 (10) making it a crop of major importance. Farming practices have changed considerably the last ten years. Among …

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A Comparison Of Management Systems For The Ewe Flock, Roger Allen Lind Jan 1970

A Comparison Of Management Systems For The Ewe Flock, Roger Allen Lind

Electronic Theses and Dissertations

Generally sheep production relates to a grassland type of agriculture. But in many areas increasing acreages are used for cultivated crops, and less land is available for pasture due to new or improved cultural practices, increased fertilization, new or improved plant species and, in some areas, irrigation. Since the availability of land for use as pasture will most likely decrease in the future due to the increasing population and food demands of the world, confinement rearing of sheep may become a necessity. Mechanization in the sheep industry has been slow, while the use of confinement or semi-confinement management systems, laborsaving …

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The Effect Of Fertilization Of A Native Lowland Pasture On Forage Intake And Nutritional Value Of Diet Selected By Grazing Sheep, John Joseph Doyle Jan 1970

The Effect Of Fertilization Of A Native Lowland Pasture On Forage Intake And Nutritional Value Of Diet Selected By Grazing Sheep, John Joseph Doyle

Electronic Theses and Dissertations

Knowledge of the forage intake and nutritional value of the diet selected by grazing animals is basic to good range management. The amount and kind of forage chosen may vary with the kind of animal, its previous history, age, size, health, and physiological state as well as with the range site, range condition, season of the year, current weather, and management practices such as intensity of grazing, grazing systems, fertilization, and supplementation With protein, phosphorus, or other nutrients. A knowledge of the various factors that affect dietary intake and selection would permit the range manager to more wisely plan the …

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South Dakota's Hutterite Colonies: 1874-1969, M. P. Riley, D. R. Johnson Jan 1970

South Dakota's Hutterite Colonies: 1874-1969, M. P. Riley, D. R. Johnson

Research Bulletins of the South Dakota Agricultural Experiment Station (1887-2011)

This publication is divided into three major parts. The first part attempts to answer such questions as Who are the Hutterites? What do they believe? and Where are they in South Dakota? The second part reports on the 1968 census of these communal farms and summarizes the sect's enterprises and changes in farm operations. The third part presents a pictorial account of Poinsett Colony, one of the newest Hutterite colonies in South Dakota.

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Methods For Rapid Identification And Enumeration Of Streptococcus Bovis From Water, Lawrence Robert Koupal Jan 1970

Methods For Rapid Identification And Enumeration Of Streptococcus Bovis From Water, Lawrence Robert Koupal

Electronic Theses and Dissertations

Because water can be a carrier of enteric pathogenic microorganisms, water pollution from a fecal source is a serious problem to a community obtaining water from streams and rivers. Adequate methods for detection of the enteric pathogens are lacking, consequently, much attention has been given to the detection of other microorganisms as indicators of fecal pollution. The microorganisms called the fecal streptococci are those streptococci which are commonly found in the intestinal tract of man and animals. The fecal streptococci have been divided into two basic groups within the Lancefield Group D streptococci. These two groups are the enterococcus group …

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A Proposed Model For The Implementation Of Play Therapy In Elementary Schools, Nancy King Jan 1970

A Proposed Model For The Implementation Of Play Therapy In Elementary Schools, Nancy King

Electronic Theses and Dissertations

Play therapy is based upon the belief that the natural medium of self-expression for a child is play. Through his play he can express himself' fully, "play out" his feelings and problems and try out different roles and theories of getting along in his world. In this paper, various approaches to play therapy will be explored. The objectives of this study were to determine the applicability of' p1ay therapy in the elementary school, how it is being implemented in South Dakota schools, and to suggest a workable program that could be implemented in an elementary school counseling situation. Specifically, the …

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The Identification Of Changing Sex Roles Within A Family Unit As Perceived By First Graders, Janelle Fridley Jones Jan 1970

The Identification Of Changing Sex Roles Within A Family Unit As Perceived By First Graders, Janelle Fridley Jones

Electronic Theses and Dissertations

Family life education includes the total education for living in families. The main emphasis of all home economics or homemaking education is life as it is lived within the home and family. Some aspects of home economics are usually included in the curriculum at all age levels from early childhood through secondary education. Family life in America has changed over the years. Such factors as family mobility, a greater amount of leisure time, an increase in early marriages, and more mothers employed outside the home indicate the need for education in family living. Moreover, currently fewer youngsters learn about homemaking …

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A Novel Fm/Am Telemetry Transmitter, Robert L. Lounsbery Jan 1970

A Novel Fm/Am Telemetry Transmitter, Robert L. Lounsbery

Electronic Theses and Dissertations

The transmission of information is in many cases vital to modern research. An example is the transmission of information which concerns the physiological phenomena taking place inside the body of an unrestrained animal. The transmission of the information has to be accomplished with a minimum amount of-discomfort to the animal. A physical connection to the sensor would cause much discomfort to the animal and would not indicate a normal situation. Therefore, in recent years the information gained from a sensor (inside of an animal's body) has been used as the intelligence to modulate a small telemetry unit. This information is …

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A Comparison Of A Low Protein Diet Plus Added Methionine With A Normal Diet For Three Strains Of Laying Hens In Various Environments, Roger Dale Muller Jan 1970

A Comparison Of A Low Protein Diet Plus Added Methionine With A Normal Diet For Three Strains Of Laying Hens In Various Environments, Roger Dale Muller

Electronic Theses and Dissertations

The protein requirement of the laying hen encompasses a problem of great importance to the nutritionist. With the discovery of amino acids, which are commonly referred to as "the building blocks of protein," it was soon evident that the fowl had a requirement primarily for amino acids, not protein. It has been difficult to establish the exact amino acid requirements of each species and age group. To overcome this difficulty, feed formulae for laying hens as well as other groups of fowl have been designed to provide a surplus of protein and thus amino acids from a wide variety of …

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The Detection Of Salmonellae From The Big Sioux River Using Fluorescent Antibody Technique And Improved Cultural Methods, Ralph Lamar Pierce Jr. Jan 1970

The Detection Of Salmonellae From The Big Sioux River Using Fluorescent Antibody Technique And Improved Cultural Methods, Ralph Lamar Pierce Jr.

Electronic Theses and Dissertations

The Water Quality Act of 1965 was passed with the intention of enhancing the quality and value of water resources and establishing a national policy for the prevention, control, and abatement of water pollution. The Federal Water Pollution Control Administration has issued guidelines to be followed by the States in developing standards for interstate waters. As an interstate stream, the Big Sioux River must conform to the Federal requirements. Pollution in South Dakota is derived principally from agricultural, municipal and industrial wastes. Dairy, meat processing and mining industries are the most important sources of industrial wastes. Bacterial pollution is the …

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Survival Of Fecal Coliforms And Fecal Streptococci In River Water, Joseph Walter Zerfas Jan 1970

Survival Of Fecal Coliforms And Fecal Streptococci In River Water, Joseph Walter Zerfas

Electronic Theses and Dissertations

The pollution of our limited natural resources, including surface waters, is a growing problem. The deterioration of the lakes and rivers is that is occurring is caused, in part, by the addition of organic material. One source of this organic pollution is the waste products of man and domestic animals, primarily in the form of fecal material. To control fecal pollution it is necessary to detect it. To detect such pollution quantitative methods are necessary. Methods for the detection of bacterial indicators endogenous to fecal material were developed for this purpose. Therefore, the purpose of this investigation is to determine …

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South Dakota 4-H Members' And Leaders' Use Of Two Types Of 4-H Manuals, Barbara Kaye Froke Jan 1970

South Dakota 4-H Members' And Leaders' Use Of Two Types Of 4-H Manuals, Barbara Kaye Froke

Electronic Theses and Dissertations

The Smith-Lever Act of 1914 established the Federal Cooperative Extension Service. The United States Department of Agriculture, the state university and the people in the community cooperatively support the extension activity known as 4-H club work. County extension agents administer the youth program within 1 each county. The 4-H member participates in informal, self-help projects within a group or club atmosphere. Club work supplements school and home activities. Volunteer community adults, aided by members' parents as well as county and state extension staffs, serve as leaders of the 4-H clubs. The early history of 4-H club work in the United …

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Estrous Synchonization, Crossbreeding And Antibiotic Feeding For Improved Ewe And Lamb Performance, Leon F. Bush, Frank Whetzal Jan 1970

Estrous Synchonization, Crossbreeding And Antibiotic Feeding For Improved Ewe And Lamb Performance, Leon F. Bush, Frank Whetzal

South Dakota Sheep Field Day Research Reports, 1970

Increased productivity and more efficient management of the ewe flock will enable the sheep industry to better compete with other livestock operations. Improved lambing percentage, decreased mortality of lambs from birth to weaning and a more uniform lamb crop will assure a greater return on ewe investment. Controlled breeding would achieve a shortened lambing period and a more uniform lamb crop. The better management necessary for a shortened, more rapid lambing may result in more lambs saved and marketed. More vigorous lambs and a lower death loss may be expected from crossbreeding and the use of antibiotics in the ewe …

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Studies Of High Level Copper Supplementation To Rations For Growing-Finishing Swine, Larry Wayne De Goey Jan 1970

Studies Of High Level Copper Supplementation To Rations For Growing-Finishing Swine, Larry Wayne De Goey

Electronic Theses and Dissertations

Scientists are continually searching for new compounds, as well as optimum levels and combinations of existing compounds, in order to improve gain and feed efficiency of pigs fed common swine rations without adversely affecting the quality of the pork produced. Feed efficiency is of particular importance to a profitable swine enterprise since feed costs make up approximately 65% of total production costs. During the last two decades there has been considerable interest in the ability of copper to increase gains and feed efficiency when fed at high levels in swine rations. Several reports have indicated that copper is an effective …

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Control Of Dairy Livestock Pests In South Dakota -- 1969, Cooperative Extension South Dakota State University Dec 1969

Control Of Dairy Livestock Pests In South Dakota -- 1969, Cooperative Extension South Dakota State University

SDSU Extension Fact Sheets

Dairy herd owners must concern themselves with pest control in their dairy management program. Heavy populations of hornflies, lice, and other livestock pests can reduce milk production.

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Sdsu Collegian, November 19, 1969, Student Association Of South Dakota State University Nov 1969

Sdsu Collegian, November 19, 1969, Student Association Of South Dakota State University

The Collegian Archive : 1960 to 1969

Vol. 78, No. 9

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Effect Of Restricted Weight Gain And/Or Dichlorvos On Reproductive Performance Of Gravid Gilts, R.H. Anderson, R.C. Wahlstrom Nov 1969

Effect Of Restricted Weight Gain And/Or Dichlorvos On Reproductive Performance Of Gravid Gilts, R.H. Anderson, R.C. Wahlstrom

South Dakota Swine Field Day Proceedings and Research Reports, 1969

In recent years much of the interest in nutrition of the gravid sow has been centered around restricting feed intake regardless of the weight gain of the sow. It has now become a common practice to restrict intake so that weight gain during gestation is limited to a maximum of 75 to 100 pounds. More recently, there has been some interest in the feeding of 2, 2 – dichlorovinyl dimethyl phosphate (dichlorvos) near the end of gestation to attempt to increase the number of live pigs born and growth rate following birth.

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Evaluation Of Milk Products In Rations For Early Weaned Pigs, Larry A. Hauser, Richard C. Wahlstrom Nov 1969

Evaluation Of Milk Products In Rations For Early Weaned Pigs, Larry A. Hauser, Richard C. Wahlstrom

South Dakota Swine Field Day Proceedings and Research Reports, 1969

It is important to have an economical starter ration that will be highly palatable and result in rapid pig gains. This is especially true for pigs weaned at three to four weeks of age. The ration must provide all of the essential nutrients in a readily available form and at a cost which is not prohibitive. Previous research with partially delactosed whey has shown that the product may be less palatable for young pigs. This was thought to be due to the increased percentage of salts which occurs when some of the lactose is removed. If this is true, then …

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In Vitro Survival Of Washed Boar Spermatoza, W.L. Singleton Nov 1969

In Vitro Survival Of Washed Boar Spermatoza, W.L. Singleton

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Fertility of boar semen stored under present conditions is at best only adequate after 24 hr. of storage and decreases sharply thereafter. It is usually recommended that boar semen not be stored more than 48 hr. for artificial insemination use. The goal is to find a means whereby boar semen fertility could be retained indefinitely by freezing. Until a success full freezing technique is found, a method of storing boar semen for a period of four to five days at above freezing temperatures would be of value to artificial insemination of swine. The objective of this experiment was to study …

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A Study Of Lysine And Distillers Dried Grains With Solubles In Growing-Finishing Swine Rations, Richard C. Wahlstrom, George W. Libal Nov 1969

A Study Of Lysine And Distillers Dried Grains With Solubles In Growing-Finishing Swine Rations, Richard C. Wahlstrom, George W. Libal

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Previous work at this station showed that distillers dried grains with solubles (DDG/S) could be fed in growing-finishing swine rations at levels up to 10 percent without affecting pig performance (A.S. Series 68-27) . It was also shown that a 20% level of DDG/S reduced gains slightly. but its greatest effect was a reduction of feed efficiency. Supplementation of these rations with lysine app eared to be beneficial. This experiment was conducted to further study the effect of lysine supplementation at two levels in rations containing 20% DDG/S on rate of gain, feed consumption and feed efficiency of growing-finishing swine.

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Effect Of Environment, Protein Level Of Ration And Sex On Performance And Carcass Characteristics Of Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, J.F. Fredrikson Nov 1969

Effect Of Environment, Protein Level Of Ration And Sex On Performance And Carcass Characteristics Of Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, J.F. Fredrikson

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Previous research at the Southeast South Dakota Experiment Farm has shown that the main economical advantage of controlled environment housing for swine is an improved feed efficiency during the winter months. Some research workers have reported that gilts require a ration of higher protein content than do barrows. If this observation is true, barrows and gilts should be fed separately for maximum performance and efficiency. The purpose of the experiment reported herein was to study the performance of barrows and gilts fed separately rations containing either 17 or 15% protein to about 110 lb. and 14 or 12% protein from …

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Barley Or Combination Of Barley And Oats For Growing-Finishing Gilts, J.W. Mccarty, R.C. Wahlstrom, Albert Dittman Nov 1969

Barley Or Combination Of Barley And Oats For Growing-Finishing Gilts, J.W. Mccarty, R.C. Wahlstrom, Albert Dittman

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Efficient utilization of barley alone or barley and oats combined has been the object of a number of feeding trials with swine at the North Central Substation, Eureka. An unreplicated trial during the growing-finishing period for 1968 spring pigs indicated essentially no difference among rations using properly supplemented barley alone or in three different combinations with oats as the grain. Because of those unexpected results a replicated trial using the same treatments for 1969 spring pigs was conducted.

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Studies Of High Level Copper Supplementation To Rations For Growing Swine, Larry Degoey, Richard C. Wahlstrom Nov 1969

Studies Of High Level Copper Supplementation To Rations For Growing Swine, Larry Degoey, Richard C. Wahlstrom

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Scientists are continually seeking ingredients to be added to common swine rations which will increase gain and feed efficiency. During recent years there has been some interest in copper as a growth promoting factor when fed at high levels. Several reports have indicated that copper is an effective growth stimulant when added to swine rations at a level of approximately 250 ppm. However, its widespread usage as a feed additive has been restricted by reports of toxicity at levels generally recommended for improving rate of gain and feed efficiency.

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High-Lysine Corn In Growing Pig Rations, Ricahrd C. Wahlstrom, George W. Libal Nov 1969

High-Lysine Corn In Growing Pig Rations, Ricahrd C. Wahlstrom, George W. Libal

South Dakota Swine Field Day Proceedings and Research Reports, 1969

In 1935 workers at the Connecticut Agricultural Experiment Station discovered a mutant gene in corn called Opaque-2. Yet high-lysine corn, the product of this discovery, was not identified until 1963 at Purdue University. Since that time several experiments have been conducted on the value of the product in both human and animal nutrition. Also, considerable research is under way on the production aspects of high-lysine corn. Regular corn is deficient in two of the essential amino acids needed by swine--lysine and tryptophan. High-lysine corn is also higher in tryptophan than normal corn. In certain other amino acids high-lysine corn may …

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Marketing Butcher Hogs At Minimum Weights Of Either 205 Or 260 Pounds, J.W. Mccarty, Albert Dittman Nov 1969

Marketing Butcher Hogs At Minimum Weights Of Either 205 Or 260 Pounds, J.W. Mccarty, Albert Dittman

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Long held views about the necessity of marketing hogs at weights between 200 and 225 lb. appear to need changing as producers are marketing a larger proportion of meatier hogs. These hogs retain their market desirability in terms of lean yield without excessive waste to weights of at least 250 lb. and in some instances heavier. Whether or not such a marketing plan is justified when the additional cost of production is considered is still not clear. A number of factors influence these production costs and returns. The trial reported here was an at tempt to evaluate final market weight …

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Calcium And Phosphorus In Rations For Growing-Finishing Swine, Richard C. Wahlstrom, J.F. Fredrikson Nov 1969

Calcium And Phosphorus In Rations For Growing-Finishing Swine, Richard C. Wahlstrom, J.F. Fredrikson

South Dakota Swine Field Day Proceedings and Research Reports, 1969

Calcium and phosphorus are two mineral elements that are most often deficient in swine rations. Since they are associated with bone development, any lameness in swine is often attributed to a lack of calcium and/or phosphorus. The objective of this experiment was to study the value of increasing levels of calcium and phosphorus above the minimum recommended requirements for growing-finishing swine.

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