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Articles 30631 - 30660 of 35945
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Crop Yield And Economic Analyses Of Selected Multiple Pivot Irrigation Schemes, Michael A. Otterby
Crop Yield And Economic Analyses Of Selected Multiple Pivot Irrigation Schemes, Michael A. Otterby
Electronic Theses and Dissertations
A project connected with the South Dakota University Agricultural Experiment Station was initiated in 1972 to evaluate alfalfa and corn yield response to a management scheme where a center pivot is used on more than one field. The project was to take place in the South Dakota climatic region and to include a limited soil moisture storage situation. In order to present the finding of the project and to evaluate the economics of such a scheme the following objectives of this study were established: 1. To develop production functions for corn and alfalfa that are applicable to South Dakota conditions …
Correlates Of Leadership Attractedness Among Instrumental And Expressive Voluntary Service Organizations In Fall River And Meade Counties Of South Dakota, William Wakefield
Correlates Of Leadership Attractedness Among Instrumental And Expressive Voluntary Service Organizations In Fall River And Meade Counties Of South Dakota, William Wakefield
Electronic Theses and Dissertations
A study of the voluntary service organizations in Fall River and Meade counties of South Dakota was conducted during 1975 to determine: 1. The various voluntary associations in Fall River and Meade counties and their functions. 2. The leaders of the various voluntary associations in these two counties, their socioeconomic characteristics, and their attractedness to these organizations. 3. Whether those leaders who are characterized as either instrumental or expressive members have joined voluntary associations because of the association's perceived instrumental or expressive orientation, or because of some other not so apparent reasons. The respective leader of the voluntary associations is …
An Ecological Analysis Of Migration Patterns In North Dakota And South Dakota, Hadley Gerald Klug
An Ecological Analysis Of Migration Patterns In North Dakota And South Dakota, Hadley Gerald Klug
Electronic Theses and Dissertations
An analysis of socioeconomically defined ecological areas through the replication of the patterned factorial design developed by Loeb! at the University of Missouri-Columbia. The major emphases of the study were to: (1) delineate homogeneous, although not necessarily contiguous, social areas using the patterned factorial design; (2) determine the capability of the previously delineated social areas to account for significant amounts of variation in residually measured net migration; (3) compare the procedures and results of the present study with those of Loebl's work. The study region consists of the states of North Dakota and South Dakota. The units of analysis are …
An Analog Technique For Soil-Tool Systems, Lyle L. Jensen
An Analog Technique For Soil-Tool Systems, Lyle L. Jensen
Electronic Theses and Dissertations
Throughout the history of agriculture man has sought improved methods of tilling soil. Technological developments in recent years have enabled man to apply large amounts of mechanical energy to soil tillage. But, as the energy limitations of the world begin to be realized, the development of more efficient means of soil tillage will become increasingly important. In tillage machine design, as in other engineering design fields, the designer has three basic methods of predicting the performance of a system. Murphy (12) states these methods as (i) application of existing laws and formulas, (ii) observations on the actual systems, and (iii) …
Factors Affecting Control Of Downy Brome In Winter Wheat With Ppg 135, Jeff Tichota
Factors Affecting Control Of Downy Brome In Winter Wheat With Ppg 135, Jeff Tichota
Electronic Theses and Dissertations
The purpose of this study was to investigate control of downy brome in winter wheat with PPG 135. PPG 135 is a mixture of IPC and p-chlorophenyl-N-methyl carbamate (PPG124). A knowledge of the factors affecting activitly of PPG135 may prove essential to provide successful control of downy brome.
Cloning Of Lilium Longiflorum And Andropogon Gerardii By Tissue Culture Of Leaf And Floral Parts, Nancy E. Stenberg
Cloning Of Lilium Longiflorum And Andropogon Gerardii By Tissue Culture Of Leaf And Floral Parts, Nancy E. Stenberg
Electronic Theses and Dissertations
The Easter lily, L. longiflorum Thunb. Is known not only for its ornamental value, but also for its large chromosomes, making it ideal cytological material. Big bluestem, Andropogon gerardii Vitman, is a South Dakota native grass. It possesses many desirable characteristics and unique adaptations to this region. This research has primarily dealt with the development of methods for cloning the species L. longiflorum and A. gerardii by tissue culture of leaf and/or floral parts. The pattern of plantlet differentiation from the cultures was also histologically studied.
Purine-Thiamine Anabolism During Cellular Morphogenesis In Myxococcus Xanthus, Wen-Cherng Tsai
Purine-Thiamine Anabolism During Cellular Morphogenesis In Myxococcus Xanthus, Wen-Cherng Tsai
Electronic Theses and Dissertations
Purine-thiamine anabolism during cellular morphogenesis in Myxococcus xanthus was investigated. One of the approaches was to test vegetative and myxospore (2.5 h and 8 h) extracts of M. xanthus CW-2 for their ability to synthesize the second de novo intermediate, 5'-phosphoribosylglycinamide, from beginning precursors either by way of phosphoribosyl-pyrophosphate amidotransferase (EC 2.4.2.14) or ribose-5-phosphate aminotransferase. Results indicate the presence of both the amido- and aminotransferases in both types of extracts, and both enzymes appear to be present at about the same level (per milligram of protein) in vegetative cells, myxospores (2.5 h and 8 h), and in a bacterial prototype, …
Characterization Of Cell-Cell Interactions In Normal And Tw32 Homozygous Preimplantation Mouse Embryos, Phyllis M. Johnson
Characterization Of Cell-Cell Interactions In Normal And Tw32 Homozygous Preimplantation Mouse Embryos, Phyllis M. Johnson
Electronic Theses and Dissertations
Immediate objectives of the following studies were to characterize and compare normal versus lethal mutant (tW32/tW32) cellular interactions during preimplantation mouse development. Principal experimental methods used included embryo culture and microscopy. Control and mutant embryos were analyzed in vitro to identify chronological events and phenotypic characteristics of tW32 homozygotes. Cell-cell associations of uncompacted and compacted 8-cell control (ICR) embryos were analyzed by quantitative electron microscopy. Lastly, light microscopic analyses were performed on control and mutant (tW32/tW32) morulae.
Growth, Reproduction And Blood Characteristics Of Hereford Females, Harold R. King
Growth, Reproduction And Blood Characteristics Of Hereford Females, Harold R. King
Electronic Theses and Dissertations
The objective of this experiment was to measure the effects of level of wintering nutrition and pasture treatment upon growth and reproduction of Hereford heifers from weaning to 4 1/2 years of age. Levels of certain blood constituents were determined at periodic intervals throughout the study as additional indicators of adequacy in intake for some major nutrients and for measures of general health of the animals. Data pertaining to weight and feed are reported in the English system, even though the metric system was used in the Review of Literature section. This was considered desirable in view of present common …
Viscoelastic Cylindrical Pressure Vessel With Variable Inner Radius, A. N. Joshi
Viscoelastic Cylindrical Pressure Vessel With Variable Inner Radius, A. N. Joshi
Electronic Theses and Dissertations
The objective of this thesis is to predict from a theoretical basis the stress redistribution processes occurring within the viscoelastic core of a cylindrical pressure vessel reinforced by an elastic casing around the outer perimeter, and subject to internal pressure applied to the time-dependent inner boundary of the cylinder. The problem so stated requires development of a new technique leading to a solution for a mixed boundary value problem for a viscoelastic body occupying an ablating cylindrical y-shaped region. The approach taken in this thesis consists in reduction of a governing integro-differential equation to an equivalent set of algebraic equ3tions …
Detection Of Antibiotic Residues In Bovine Milk, Mark Edward Johnson
Detection Of Antibiotic Residues In Bovine Milk, Mark Edward Johnson
Electronic Theses and Dissertations
Under the Food, Drug, and Cosmetic Act antibiotics are considered as ·adulterants in milk and milk products. Cultured dairy products cannot be made with milk containing small concentrations -of antibiotics. Also, minute quantities of antibiotics cause allergic reactions in some people. Penicillin is the most common antibiotic to which people are allergic, and penicillin is also the most commonly used antibiotic in the treatment of infections in bovines. Antibiotics, whether injected intravenously or intramuscularly, or infused into the udder of the cow, can be secreted into the milk. It is for this reason that withdrawal times for milk from cows …
Intake And Digestibility Of Brown-Midrib Corn Silage By Lactating Dairy Cows, James Allen Rook
Intake And Digestibility Of Brown-Midrib Corn Silage By Lactating Dairy Cows, James Allen Rook
Electronic Theses and Dissertations
Two short-term trials evaluated brown-midrib-3 (bm3) mutant (low lignin) corn silage for early lactation Holstein cows. In trial 1, five cows per group were individually fed a ration of silage and grain (60:40 ratio, dry matter basis) from week 2 through 8 of lactation. Lignin percentages for bm3 and normal silages were 4.9 and 6.4. Cattle fed the bm3 ration consumed 19% more total dry matter as percent of body weight than cows fed normal. Digestibilities of dry matter, cell-wall contents, acid detergent fiber, and energy were 3 to percentage units higher for the bm3 …
Heterospermic Insemination In Swine, Donald G. Levis
Heterospermic Insemination In Swine, Donald G. Levis
Electronic Theses and Dissertations
The studies report herein were conducted to evaluate (1) if there is a difference in pregnancy rate and litter size in swine between heterospermic and homospermic inseminations, (2) the effect of mixing various fresh cm n components involving spermatozoa in the sperm-rich fraction, seminal plasma from the centrifuged post-sperm fraction and Beltsville Ll extender on oxygen consumption, pH, motility and percent dead spermatozoa and (3) the effect of storage (54 hours) on oxygen consumption, pH, motility and percent dead spermatozoa in the various combinations. One Hampshire and one Yorkshire boar were used in the pregnancy rate and litter size study.
The Agronomic Effects Of Difenzoquat On Spring Wheat As Affected By Stage Of Growth And Variety, Randal Lee Anderson
The Agronomic Effects Of Difenzoquat On Spring Wheat As Affected By Stage Of Growth And Variety, Randal Lee Anderson
Electronic Theses and Dissertations
Wild oat (Avena fatua) is a major weed problem in small grains grown in the Central Plains area. Preemergent herbicides have been development which control wild oat. Diallate (S-(2,3-dichlorallyl) diisoprophylthiocarbamate) and triallate (S- (2,3,3-trichloroallyll) diisoprophylthiocarbamate) are preemergent herbicides which give good short-term control of wild oat. However, late germinating wild oat may emerge to reeducate yield. Barban (4-chloro-2-butynyl m-chlorocarbanilate) is a postemergent herbicide, but is effective only at the early growth stages of wheat. A late postemergent herbicide is needed to allow more wild oat to germinate for better full-season control. A late postemergence herbicide would also aid in preventing …
Utilization Of Fly Ash In The Removal Of Orthophosphate From Water Samples, Marla Rae Behm
Utilization Of Fly Ash In The Removal Of Orthophosphate From Water Samples, Marla Rae Behm
Electronic Theses and Dissertations
The ability of different fly ash samples to remove orthophosphate from standard phosphate solutions and from wastewater samples is reported. The results of studies to determine the temperature, the amount of fly ash, and the time necessary for maximum orthophosphate removal are included. The mode of action, whether by absorption onto the fly ash or by a precipitation reaction with one or more of the soluble components from the fly ash, is also investigated. The chemical compounds present in the fly ash, as determined by x-ray diffraction, are also included.
Topical Ld50 Determinations For Several Insecticides On Field Collected Larval And Adult Western Corn Rootworms, Leland L. Barthelman
Topical Ld50 Determinations For Several Insecticides On Field Collected Larval And Adult Western Corn Rootworms, Leland L. Barthelman
Electronic Theses and Dissertations
The Entomological Society of America published a tentative method for detection for insecticide resistance in Diabrotica species (Anonymous 1972). In this publication only Diabrotica adults were used for evaluating insecticide resistance on a 24-hour basis. I began studies in 1975 to determine topical data for several insecticides on field collected larvae and adult western corn rootworms. The purpose of this research is to determine if correlations exist between adult and larval LD50 levels using organophosphates and carbamates, as well as comparisons of the larval LD50 data to field performance data.
Venezuelan Equine Encephalomyelitis Virus Induced Mammalian And Mosquito Cell Volume Changes As Detected With The Coulter Counter, Richard H. Fulker
Venezuelan Equine Encephalomyelitis Virus Induced Mammalian And Mosquito Cell Volume Changes As Detected With The Coulter Counter, Richard H. Fulker
Electronic Theses and Dissertations
The need exists for a detection system which is specific in its diagnosis of viruses. The system presented in this investigation uses antiserum treated virus infected cell cultures to establish specificity. The need exists for an automated virus detection system. The system described in this thesis uses the Boulter Counter, a computer analysis, and a simplified procedure which makes the system suitable and automation. The need also exists for an inexpensive virus detection system. The system proposed in this investigation uses no expensive animal facilities and it will require reduced man-hours. The final need of a virus detection system is …
A Survey Of Why Students Select South Dakota State University Based On The Opinions, Information Sources, And Attitudes Of Entering Students, Vincent O. Heer
A Survey Of Why Students Select South Dakota State University Based On The Opinions, Information Sources, And Attitudes Of Entering Students, Vincent O. Heer
Electronic Theses and Dissertations
The purpose of this study is to examine the information sources, attitudes, and opinions, relevant to the selection process, of the 1975-76 entering students at South Dakota State University to discover what reasons students give for selecting SDSU. It is the hope that this study will reveal important information about the students of South Dakota State University, their attitudes, opinions, and sources of information concerning why they attend. This information is sought so those officials in decision making positions can have a better informational base from which to make important judgements affecting the institution and its component parts. Specifically the …
An Anatomy Of Civil Disorder : Memphis, Tennessee February 12-April 16, 1968, Eli H. Arkin
An Anatomy Of Civil Disorder : Memphis, Tennessee February 12-April 16, 1968, Eli H. Arkin
Electronic Theses and Dissertations
No abstract provided.
The South In The Fiction Of Caroline Gordon, Marta Suzanne Paul
The South In The Fiction Of Caroline Gordon, Marta Suzanne Paul
Electronic Theses and Dissertations
No abstract provided.
A Study Of Fishes Impinged At The Allen Steam Plant From August, Christopher K. Bernet
A Study Of Fishes Impinged At The Allen Steam Plant From August, Christopher K. Bernet
Electronic Theses and Dissertations
No abstract provided.
The Grail Quest Legend In Le Morte Darthur, Idylls Of The King, And The Waste Land, With Especial Emphasis On The Quest As Vehicle For The Consideration Of A Major Contemporary Problem / By Amelia Annelle Smith, Amelia Annelle Smith
Electronic Theses and Dissertations
No abstract provided.
An Investigation Of The Antitumor Activity Of Pycnocoma Cornuta Muell. Arg. (Family Euphorbiaceae) / By William D. Torres, William D. Torres
An Investigation Of The Antitumor Activity Of Pycnocoma Cornuta Muell. Arg. (Family Euphorbiaceae) / By William D. Torres, William D. Torres
Electronic Theses and Dissertations
No abstract provided.
Attitudes Toward Sex-Role Orientation Of Women At The University Of Mississippi / By Katherine Sabel Sullivan, Katherine Sabel Sullivan
Attitudes Toward Sex-Role Orientation Of Women At The University Of Mississippi / By Katherine Sabel Sullivan, Katherine Sabel Sullivan
Electronic Theses and Dissertations
No abstract provided.
8th Street 1959 : The Last Quiet Nights / By Glennray Tutor, Glennray Tutor
8th Street 1959 : The Last Quiet Nights / By Glennray Tutor, Glennray Tutor
Electronic Theses and Dissertations
No abstract provided.
Admiration, Abhorrance, Admiration : The Criticism Surrounding The Harmonious Painting Of Henri Matisse / By Elizabeth White Reed, Elizabeth White Reed
Admiration, Abhorrance, Admiration : The Criticism Surrounding The Harmonious Painting Of Henri Matisse / By Elizabeth White Reed, Elizabeth White Reed
Electronic Theses and Dissertations
No abstract provided.
A Study Of A Personality Model And Its Predictions For Presidential Decision-Making / By Jolene Richardson, Jolene Richardson
A Study Of A Personality Model And Its Predictions For Presidential Decision-Making / By Jolene Richardson, Jolene Richardson
Electronic Theses and Dissertations
No abstract provided.
Misogynistic Attitudes Shown In Three Of Edward Albees Plays / By Rebecca Gayle Sanders, Rebecca Gayle Sanders
Misogynistic Attitudes Shown In Three Of Edward Albees Plays / By Rebecca Gayle Sanders, Rebecca Gayle Sanders
Electronic Theses and Dissertations
No abstract provided.
Subjective Associations Between Classical Mythology And Modern Technology Expressed In Graphic Terms, Charles Abraham
Subjective Associations Between Classical Mythology And Modern Technology Expressed In Graphic Terms, Charles Abraham
Electronic Theses and Dissertations
No abstract provided.
A Latex Agglutination Test For Measles And Influenza Viruses / By Euridices Tamayo-Caddeo, Euridices Tamayo-Caddeo
A Latex Agglutination Test For Measles And Influenza Viruses / By Euridices Tamayo-Caddeo, Euridices Tamayo-Caddeo
Electronic Theses and Dissertations
No abstract provided.