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Aflatoxicosis In Poultry, John G. Gregoriades Jan 1968

Aflatoxicosis In Poultry, John G. Gregoriades

Electronic Theses and Dissertations

The term "aflatoxicosis" is applied to the toxicosis which is produced by "aflatoxin", a poisonous metabolite produced by certain strains of Aspergillus flavus. This toxin is a part of a series of toxins produced by fungi, which may be ingested by livestock, poultry and humans to produce toxigenic effects--the so-called mycotoxicoses. The occurrence of mycotoxicoses are frequent enough considering the prevalence of fungi and their proliferation in nature. They develop under favorable environmental conditions in foods and feeds of plant origin before and after harvest.

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Dried Whey, Fish Solubles In Growing-Finishing Swine Rations And Effects Of Distillers Dried Grains With Solubles On Ration Digestibility, Craig S. German Jan 1968

Dried Whey, Fish Solubles In Growing-Finishing Swine Rations And Effects Of Distillers Dried Grains With Solubles On Ration Digestibility, Craig S. German

Electronic Theses and Dissertations

Many workers have suggested the possibility of an unidentified growth factor (s) in certain feed ingredients. Feeding trials conducted to determine the effect of unidentified growth factor sources on growth rates have produced inconsistent results. One of the biggest problems has been the isolation and identification of the compound responsible for the growth stimulus often obtained when unidentified growth factor sources are fed. Empirical fractionations have been done with some unidentified growth factor sources. Growth stimulation has been reported with various fractions extracted with different organic solvents, with a water extract as well as the ash of growth factor sources. …

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Variation Between Boars In Semen Characteristics And Fertility, Wayne L. Singleton Jan 1968

Variation Between Boars In Semen Characteristics And Fertility, Wayne L. Singleton

Electronic Theses and Dissertations

The most important factor influencing the income from a livestock breeding herd is the number of offspring produced per female per year. This number varies between herds and species and is influenced by such factors as disease, nutrition, genetics, management, climate, and endocrine balance. It has been estimated that over 30% of the potential offspring from the sow are lost between ovulation and the thirtieth day of pregnancy. It would be of great economic value to reduce this loss both in terms of increased number of offspring per pregnancy and increased number of offspring per year. The sow has long …

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Content Of Two Upper Midwest Farm Magazines As Related To Major Types Of Farming In South Dakota, Frank J. Shideler Jan 1968

Content Of Two Upper Midwest Farm Magazines As Related To Major Types Of Farming In South Dakota, Frank J. Shideler

Electronic Theses and Dissertations

The objectives of this study are to determine (1) differences in subject matter in two Midwestern farm magazines, and (2) how these magazines conformed to reader needs, based on the assumption that these needs are a reflection of the traditional types of agriculture in the area served by the publications. The magazines used in this study are: The Dakota Farmer, Aberdeen, South Dakota, and The Farmer., St. Paul, Minnesota. Comparisons, when draw, are designed to indicate a point rather than to judge or intimate that one of the magazines is better than the other. To further emphasize this point of …

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Relationships Between Beef Palatability And Bone Density, Bone Hardness And Other Maturity Indicators, David E. Schafer Jan 1968

Relationships Between Beef Palatability And Bone Density, Bone Hardness And Other Maturity Indicators, David E. Schafer

Electronic Theses and Dissertations

A trend in recent years has been for meat scientists to concentrate much of their effort on obtaining a more complete understanding of those factors which affect or contribute to meat quality or palatability. Some of these topics have ranged from the effect of nutritional regime on palatability to the effects of hormone treatments, antemortem stress conditions, breeds or types, sex, marbling levels, maturity or age, cooking techniques, chemistry of muscle and fat, measurement of muscle fiber diameter and extensibility, connective tissues and, finally, color of muscle and fat. This emphasis on factors relating to beef palatability has also caused …

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An Analysis Of Hedging And Forward Contracting As Aids In Obtaining Credit, Rodney R. Roesler Jan 1968

An Analysis Of Hedging And Forward Contracting As Aids In Obtaining Credit, Rodney R. Roesler

Electronic Theses and Dissertations

Futures trading in the United States began over 100 years ago. The first commodities traded were grains such as wheat, corn and oats. Since that time, over 50 commodities ranging from live animals and animal products to coffee, sugar and metals have been added to the list of commodities traded in the futures markets. Currently, 29 commodities possessing widely varying physical characteristics are actively traded on United States' exchanges. Appendix table A-1 lists a number of commodities, some of which are inactive and others which are actively traded on futures markets in the United States. The basic characteristics of Unit�d …

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Feedlot Adaptation And Shrinkage Of Feeder Cattle, Robert E. Revell Jan 1968

Feedlot Adaptation And Shrinkage Of Feeder Cattle, Robert E. Revell

Electronic Theses and Dissertations

In the past 10 to 20 years the cattle feeding industry has undergone many changes. A number of changes in environmental factors and management practices have created problems in the adaptation of newly arrived cattle to their new environment. Major problems are the high incidence of diseases resulting in extensive treatments, slow gaining cattle during the early stages in the feedlot, and costly death losses. All result in narrowed profit margins. Cattle are being sent to feedlots at an earlier age. The practice of holding cattle until they are mature or selling them as grass-fats has declined. Feedlot operators want …

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Genetic Parameters Among Production, Carcass Composition And Carcass Quality Traits Of Beef Cattle, Darrell A. Busch Jan 1968

Genetic Parameters Among Production, Carcass Composition And Carcass Quality Traits Of Beef Cattle, Darrell A. Busch

Electronic Theses and Dissertations

There were 1,642,000 beef cows in South Dakota on_ January 1, 1967, which was 14 percent higher than the 1961-65 average (South Dakota Crop and Livestock Reporting Service, 1967). These cows were valued at $307, 054, 000, a 27 percent increase over the 1961-65 average. There were 390, 000 head of cattle and calves on feed on January 1, 1967, a 33 percent increase over 1961 and a 22 percent increase over the 1961-65 average. The sale of cattle and calves has accounted for 44 percent of the cash farm income in South Dakota for the period 1958-65 and is …

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A Study Of Resource Allocation On Farms Engaged In Swine Production In Southeastern South Dakota, Robert Lincoln Borgers Jan 1968

A Study Of Resource Allocation On Farms Engaged In Swine Production In Southeastern South Dakota, Robert Lincoln Borgers

Electronic Theses and Dissertations

This study was undertaken to compare alternative livestock programs on southeastern South Dakota farms. Variations in hog production have been emphasized since swine feeding accounts for much of the income generated within the community. In addition to the amount of income, stability of income, risk, capital and labor requirements have been compared as limiting factors to be seriously considered. Diminishing numbers of farmers and new pork production methods have caused remaining farmers and new pork production methods have caused remaining farmers to reassess use of scarce inputs and new means of successful swine raising. Some questions which arise in the …

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Effects Of Dieldrin On Reproduction Of Penned Hen Pheasants In The Second Generation, William Lyman Baxter Jan 1968

Effects Of Dieldrin On Reproduction Of Penned Hen Pheasants In The Second Generation, William Lyman Baxter

Electronic Theses and Dissertations

Effects of dieldrin on penned hen pheasants (Phasianus colchicus) which were the offspring of hens receiving encapsulated dieldrin the previous year were measured. Hens produced by the previous year's control group received 0, 6, 8, or 12 mg of dieldrin per week for 14 weeks. Hens from treated groups received 0 or 6 mg per week. Effects of dieldrin were evaluated by influences upon reproductive success. Mortality occurred in all groups receiving dieldrin, and appeared to be correlated with a reduction in egg production. Dieldrin lowered egg production by reducing food consumption in the 12 mg group and two groups …

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Snapping Turtle Life History On Lacreek Refuge, South Dakota, Donald Arthur Hammer Jan 1968

Snapping Turtle Life History On Lacreek Refuge, South Dakota, Donald Arthur Hammer

Electronic Theses and Dissertations

Investigations of the snapping turtle population on Lacreek National Wildlife Refuge in south-central South Dakota were conducted during 1965-67. Turtles captured by trapping, “hooking”, boxing nests and catching nesting females were measured, marked and released. Turtles were marked by toe-clipping, routing, flagging, and tagging. Attaching a metal tag with a “pop-rivet gun” was the most successful marking technique. Molluscs (95 percent frequency) and vegetation (91 percent frequency) were the most important food items of 22 turtles captured on Valentine Refuge in north-central Nebraska. Bird remains were found in 23 percent of the stomachs. Recapture of marked turtles indicated that individual …

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Life History And Ecology Of The Black-Footed Ferret In The Wild, Conrad N. Hillman Jan 1968

Life History And Ecology Of The Black-Footed Ferret In The Wild, Conrad N. Hillman

Electronic Theses and Dissertations

Twenty-one black-footed ferrets (Mustela nigripes) were observed at six different locations in southwest South Dakota between April 1966, and September 1967. All observations were made on black-tailed prairie-dog (Cynomys ludovicianus) towns from 15 to 100 acres in size. Because of the proximity of towns inhabited by ferrets, it was possible that individual animals were observed in more than one location. Three litters of ferrets were studied. Young ferrets were most active during early morning and late evening hours. Ferrets remained as a group until early fall when dispersal evidently occurred. Young ferrets accepted live-tethered and dead prairie dogs, mice, cottontails …

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Food Habits And Energy Utilization Of Badgers, Grant K. Jense Jan 1968

Food Habits And Energy Utilization Of Badgers, Grant K. Jense

Electronic Theses and Dissertations

A study was initiated in 1966 to determine food habits and energy utilization of badgers. Digestive tracts were collected in eastern South Dakota from November 1966 to November 1967. A male and a female badger were used for two energy-balance and three digestion trials. Ground squirrels, mice and rabbits were found to be the most important mammal foods eaten. Birds and eggs were only eaten during spring and summer. Toads and grains were important fall foods. Insects were eaten throughout the year but usually only in trace amounts. However, when available, badgers ate large quantities of beetles and ground-nesting bees. …

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A Survey Of Pollution On Selected Streams In The Black Hills Of South Dakota, Thomas J. Jurgens Jan 1968

A Survey Of Pollution On Selected Streams In The Black Hills Of South Dakota, Thomas J. Jurgens

Electronic Theses and Dissertations

Seven Streams in the Black Hill of South Dakota were surveyed to determine the influence of suspected sources of pollution on these streams. The sources of pollution included both sewage treatment plant effluents and mining wastes. A comparison of the benthic fauna community below a pollution source to that above it was the primary basis for evaluating the effect of the pollution source on the stream. The results of the benthic fauna samples indicated that the streams surveyed were being polluted. The degree of pollution of each stream was also indicated by these results. Chemical analysis were sued to verify …

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Food Habits Of The Sharp-Tailed Grouse (Pedioecetes Phasianellus Jamesi) And The Greater Prairie Chicken (Tymphanuchus Cupido Pinnauts) In Western South Dakota, Bruce A. Renhowe Jan 1968

Food Habits Of The Sharp-Tailed Grouse (Pedioecetes Phasianellus Jamesi) And The Greater Prairie Chicken (Tymphanuchus Cupido Pinnauts) In Western South Dakota, Bruce A. Renhowe

Electronic Theses and Dissertations

Summer food preferences were determined for 48 adult sharp-tailed grouse (Pedioecetes phasianellus jamesi) in a mixed grass habitat. Seasonal foods were determined for 659 sharptails and prairie chickens (Tympanuchus cupido pinnatus). Vegetation analysis of four selected study areas indicated significant differences (P<.05) in grassland and brushy draw habitats. Of plant food items, cultivated crops were first in importance on the basis of crop analysis by volumetric comparison for summer, fall, and winter for prairie grouse. Common dandelion (Taraxacum officinale) ranked first (72.2 percent) in importance by volume for 63 sharptai8ls during spring. Short-horned grasshoppers (Acrididas) were the most important insect item by volume for summer, fall, and winter. Preference indices for food items taken by 48 adult sharp-tailed grouse during summer indicated selectivity for rose (Rosa arkansana) hips, wolfberry (Symmphoricarpos occidentalis) fruits, clovers (Trifolium spp.), and prickly lettuce (Lactuca Serriola) flower heads. Cultivated crop were fifth in important based on the food-preference index. Short-horned grasshoppers were consumed in approximate proportion to their availability.

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A Study Of Some Physico-Chemical Changes In A Spread-Type Dairy Product During Storage, Alfredo E. Gudeikis Jan 1968

A Study Of Some Physico-Chemical Changes In A Spread-Type Dairy Product During Storage, Alfredo E. Gudeikis

Electronic Theses and Dissertations

In the Dairy Science Department at South Dakota State University a new dairy spread product has been developed which has only 50% of the fat content of butter or margarine and 60% of the calorie value of the higher fat products. It is increased in solids content with nonfat milk solids. The purpose· of developing this product was to obtain a new outlet for milk constituents; desirably it was to be one that could regain the market sales which were lost by butter and are now enjoyed by the margarines. The high price of butter compared with the substitute product …

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The Feeding Value Of High Dry Matter Corn Silage, Myers J. Owens Jan 1968

The Feeding Value Of High Dry Matter Corn Silage, Myers J. Owens

Electronic Theses and Dissertations

The important of corn in dairy cattle feeding is generally acknowledged. A popular way of preserving the crop is to make corn silage, thus using the whole plant for feed and preserving maximum feed per acre. The increased utilization of corn silage by dairymen may be due to its high energy yields per acre, high acceptability by cattle, and ease with it is incorporated into automated systems of harvesting and feeding. The increasing importance of corn silage in the United State is evidenced by the increasing acreages harvested as corn silage. In 1950 there were 4,937,000 acres planted with a …

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Mannitol Induced Renal Alterations In Rabbits, William R. Taggart Jan 1968

Mannitol Induced Renal Alterations In Rabbits, William R. Taggart

Electronic Theses and Dissertations

Mannitol, an alcohol of six carbon sugar-mannose, has a molecular weight of 182.17. It has the inability to enter the tricarboxylic acid cycle which makes mannitol a physiological stable compound. This chemical structure, physical and physiological properties of mannitol are listed in figure 1 Barry, (1963). The clinical use of mannitol as a therapeutic agent has been validated many times in the literature. The utilization of mannitol as a prophylactic measure in prevention of acute renal failure following surgery or trauma has been reported by many authorities. Before recently many surgeons have selected the utilization of mannitol rather than urea …

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Social And Economic Factors Affecting Household Expenditures For Outdoor Recreation In Northeastern South Dakota, Albert Ward Van Ness Jan 1968

Social And Economic Factors Affecting Household Expenditures For Outdoor Recreation In Northeastern South Dakota, Albert Ward Van Ness

Electronic Theses and Dissertations

The measure and extent of outdoor recreation demand and associated household consumption expenditures can be estimated at the national, state, and local levels. This study is an attempt to measure the household expenditures f or outdoor recreation within an economically based trade area and to determine the relationship between these expenditures and the socio-economic characteristics of households. . . . The study characterizes the scope and nature of the family consumption expenditures for outdoor recreation. The project examines these demands in terms of the family budget in the selected area. Specifically the research in this study has the following objectives: …

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The Pollution Potential Of Feedlots Along The Main Stem Of The Big Sioux River, John Edward Foley Jan 1968

The Pollution Potential Of Feedlots Along The Main Stem Of The Big Sioux River, John Edward Foley

Electronic Theses and Dissertations

Modern technology is reshaping the world. Advances, accompanied by great changes, are being made in every facet of this nation's and the world's way of life. Every person, place, or object is affected to some degree by these technological advances. An area of endeavor receiving a great amount of benefit from twentieth-century science is agriculture. Farms in the United States have been lifted to levels of production and efficiency undreamed of not very long ago. But, as in the case of most technological advances, unraveling the old problems has brought about a new set of problems which are perhaps even …

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Characteristics Of The Rachitogenic Activity In Isolated Soybean Protein, Owen Joscelyn Thompson Jan 1968

Characteristics Of The Rachitogenic Activity In Isolated Soybean Protein, Owen Joscelyn Thompson

Electronic Theses and Dissertations

The characteristics of the rachitogenic activity in isolated soybean protein were investigated. Day-old Broad Breasted White and/or Wrolstad Small White turkey poults were used. Levels of calcium, phosphorus and vitamin D3 were equal to or greater than National Research Council recommendations. Criteria used for evaluation were body weight gains, tibia ash, serum alkaline phosphate, serum inorganic phosphate and serum calcium. Trays containing dry isolated soybean protein spread to a uniform depth of two and one-half centimeters were placed in an autoclave and brought to 100oC by steaming and then 120oC for a designated period of …

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Relevance Of The Work Of Suzanne Langer For Philosophy Of Religion : Examination Of The Non-Discursive Nature Of Religious Language / By Vela Willis Shirley, Jr, Vela Willis Shirley Jr Jan 1968

Relevance Of The Work Of Suzanne Langer For Philosophy Of Religion : Examination Of The Non-Discursive Nature Of Religious Language / By Vela Willis Shirley, Jr, Vela Willis Shirley Jr

Electronic Theses and Dissertations

No abstract provided.

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The Use Of Farnesol In The Study Of Metamorphosis And Polytene Chromosomes In Aedes Aegypti (Linn.), Gerald Bruce Whitfield Jan 1968

The Use Of Farnesol In The Study Of Metamorphosis And Polytene Chromosomes In Aedes Aegypti (Linn.), Gerald Bruce Whitfield

Electronic Theses and Dissertations

No abstract provided.

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Optimum Plans For A 1600 Acre Ranch On Williams-Tetonka-Cavour Soil Association In Central South Dakota Including An Analysis Of Pasture Improvement Work Done By Ranchers, Herbert R. Allen Jan 1968

Optimum Plans For A 1600 Acre Ranch On Williams-Tetonka-Cavour Soil Association In Central South Dakota Including An Analysis Of Pasture Improvement Work Done By Ranchers, Herbert R. Allen

Electronic Theses and Dissertations

A profit maximizing linear programming model was used to arrive at optimum plans for a typical ranch in the Willimas-Tetonka-Cavour soil association are of central South Dakota. The typical ranch used for the analysis had 500 acres of cropland and 1056 acres of native grass. Low, medium and high levels of efficiency were assumed in grain crop and livestock production. Forage production was obtained from different management systems on tame grasses and native grasses. Tame grasses included brome-alfalfa, crested wheatgrass, Russian wild rye, and sudan grass. Native grass production was obtained from alternative management systems including renovated pasture, fertilized pasture, …

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Optimum Movement Of Feeder Calves And Feed Grains Within South Dakota With Implications For Slaughter Plant Location, Valentine M. Heier Jan 1968

Optimum Movement Of Feeder Calves And Feed Grains Within South Dakota With Implications For Slaughter Plant Location, Valentine M. Heier

Electronic Theses and Dissertations

The basic economic activity in South Dakota is agriculture. Therefore, it is essential to the economic position of the state that information is made available which can serve as a guide in developing the agricultural industries within the state. The purpose of this study is to provide such information to the cattle feeding and beef slaughtering industries. Livestock data indicate that a large proportion of the cattle produced in South Dakota is shipped out of the state for fattening and slaughter. Data also indicate that the state is an exporter of feed grains. It seems that if these feeder cattle …

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Chlorinated Hydrocarbon Residues In Pronghorn Antelope Antilocapra Americana Americana (Ord) 1815 Of South Dakota Collected In 1966, Gary L. Moore Jan 1968

Chlorinated Hydrocarbon Residues In Pronghorn Antelope Antilocapra Americana Americana (Ord) 1815 Of South Dakota Collected In 1966, Gary L. Moore

Electronic Theses and Dissertations

Man’s primary concerns have always been the struggle for survival and improvement of his lot. As his numbers increased, he attained greater ability to manipulate his environment. One method of manipulation has been through the use of insecticides. One of the largest uses of insecticides has been in connection with pest control on agricultural lands. Pest control has become of great economical significance within the past decades. Since South Dakota is primarily as agricultural state it has been caught up in this bioeconomical problem. One control method used has been the use of chlorinated hydrocarbon insecticides. (see more in text)

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Lipid Analysis Of Maturing Crambe Seed, Dwayne Walter Rehfeld Jan 1968

Lipid Analysis Of Maturing Crambe Seed, Dwayne Walter Rehfeld

Electronic Theses and Dissertations

For several years, plants have been screened in the search for compounds that might have a potential use in industry and which presently have no other suitable source (1). During a screening study, Mikolajczak et al. (2) found that crambe (common name for Crambe abyssinica) contained a high percentage of erucic acid. Erucic acid has many potential industrial uses and is currently being obtained from imported rapeseed (J). Because there is presently no suitable domestic source of erucic acid, crambe is a potential new crop for the United States. Field studies of crambe have shown that the seeds tend to …

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Comparative Gross And Histologic Anatomy Of The Gastrointestinal Tract Of Pronghorn Antelope And Domestic Sheep, James A. Raney Jan 1968

Comparative Gross And Histologic Anatomy Of The Gastrointestinal Tract Of Pronghorn Antelope And Domestic Sheep, James A. Raney

Electronic Theses and Dissertations

The relationship between the domesticated sheep, Ovis aries, and the pronghorn antelope, Antilocapra americana americana, is close enough to validate a comparative gastrointestinal tract analysis (Table 1). This analysis is intended to compare and describe the various parts of the gastrointestinal tract of each species in the order of their occurrence from the esophagus through the rectum. . . . An attempt was made in this study to compare the gastrointestinal tract of the sheep and the pronghorn antelope, using the sheep as a guide because of its similarity and availability. The purpose of this study is not to prove …

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An Archaeological Survey Of Certain Sites In Sardis Reservoir, Samuel O. Mcgahey Jan 1968

An Archaeological Survey Of Certain Sites In Sardis Reservoir, Samuel O. Mcgahey

Electronic Theses and Dissertations

No abstract provided.

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Metabolism And Distribution Of Thiopental Sodium In The Adrenalectomized Rat / By Timothy Dale Shaw, Timothy Dale Shaw Jan 1968

Metabolism And Distribution Of Thiopental Sodium In The Adrenalectomized Rat / By Timothy Dale Shaw, Timothy Dale Shaw

Electronic Theses and Dissertations

No abstract provided.

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