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Articles 2671 - 2700 of 3226
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Effects And Interactions Of Nitrogen And Soil Moisture Status Under A High Yield Irrigated Corn Environment, Dwayne L. Beck
Effects And Interactions Of Nitrogen And Soil Moisture Status Under A High Yield Irrigated Corn Environment, Dwayne L. Beck
Electronic Theses and Dissertations
A two-part study was conducted during the 1979 and 1980 growing seasons on irrigated lands adjoining the Missouri River in central South Dakota. Empirical [sic] models were developed to describe the response of irrigated corn (Zea mays L.) to soil water status and nitrogen fertilization at a location recently developed for sprinkler irrigation. Nitrogen fertilizer rates of 0, 100, 200, and 400 kg of N/ha were used under water treatments consisting of a 2.5 cm irrigation when soil water matric potential at a depth of 40 cm decreased to -35, -50, and -75 kPa. Yield differences due to soil water …
Health Knowledge Assessment Of College Freshmen Educated In South Dakota K-12, Nadeen E. Lunde
Health Knowledge Assessment Of College Freshmen Educated In South Dakota K-12, Nadeen E. Lunde
Electronic Theses and Dissertations
Nothing in life is so taken for granted when possessed, or so missed when lost, as is health. Therefore, it is essential to possess basic facts if each individual is to take advantage of medical science advances, protect himself against quackery, and obtain an optimum level of health. Health education is recognized by leading educators as of vital importance in educating our youth, but health education has not established itself in a way comparable to other subjects. Kilander noted this fact as early as 1937, and yet, 46 years later, South Dakota's health education programs have not been established. Many …
Vitamin A And Carotene Supplementation On Feedlot Lambs, Donald F. Samuel
Vitamin A And Carotene Supplementation On Feedlot Lambs, Donald F. Samuel
Electronic Theses and Dissertations
After the discovery and identification of vitamin A as an essential nutrient, the role of the vitamin and its precursor carotene in the nutrition of animals came under widespread study. Many experiments have been designed in the past to examine the interrelationships concerning vitamin A and carotene in animal feeding. In view of the similarity of digestive systems between cattle and sheep, it was reasonable to assume that vitamin A and carotene might function much the same in the two species. As numerous investigators have demonstrated, there are many similarities in vitamin A metabolism between cattle and sheep. However, there …
Ultrafiltration Of Skim Milk Prior To Cottage Cheese Making, Izhar H. Athar
Ultrafiltration Of Skim Milk Prior To Cottage Cheese Making, Izhar H. Athar
Electronic Theses and Dissertations
Cottage cheese has the largest sales volume potential of all cultured dairy products in the United States today. Moreover, it can be a highly profitable product if proper control is exercised during its manufacturing (46). Commercial production of cottage cheese utilizes a significant portion of the total fluid milk produced in the U. S.A. After the 1955's, yearly per capita consumption of cottage cheese increased from 1. 7 7 kg (3.9 lb) to a high of 2. 45 kg (5.4 lb) in 1972 (67) . Consumer demand for lower fat dairy products gradually increased, which put more pricing emphasis on …
The Subject Matter And Content Emphases Of Secondary Home Economics Programs In South Dakota, Darlys Olson Zaske
The Subject Matter And Content Emphases Of Secondary Home Economics Programs In South Dakota, Darlys Olson Zaske
Electronic Theses and Dissertations
The purpose of this study was to describe secondary home economics programs in South Dakota. Specifically, it was designed to identify subjects being taught and pervasive themes running throughout the subjects of home economics programs. A secondary objective was to investigate the relationship between curricular emphases and certain characteristics of the school and teacher. Variables studied were 1) teaching experience, 2) class enrollments, 3) school size, 4) personal preference of teaching subject, and 5) professional interaction. To determine the curriculum emphases of the teachers, the Curriculum Orientation Survey (COS), developed by Hall, was used to measure the extent to which …
Rumen Microbial Protein Synthesis In Cows Fed Dried Whey, Paul M. Windschitl
Rumen Microbial Protein Synthesis In Cows Fed Dried Whey, Paul M. Windschitl
Electronic Theses and Dissertations
Two rumen fistulated Holstein cows, weighing approximately 550 kg, were used in a switchback design experiment to evaluate the effects of consuming large amounts (38% of total ration dry matter) of dried whey on rumen microbial protein synthesis. Cows were fed total mixed rations consisting of (dry matter basis) 45% corn silage, 10% alfalfa hay, and 45% concentrate mix. The concentrate mix was primarily corn and soybean meal (control) or 85% dried whole whey. Dry matter intakes averaged 16.4 and 15.3 kg/day for control and whey diets. Concentrations of bacteria and protozoa in rumen contents were estimated using diaminopimelic acid …
Caffeine Intake During Pregnancy : The Effect On The Fetus, Charlotte Ann Goode
Caffeine Intake During Pregnancy : The Effect On The Fetus, Charlotte Ann Goode
Electronic Theses and Dissertations
No abstract provided.
Physiological Characterization Of Clostridium Thermoaceticum Cultivated On A Chemically Defined Medium, Leon Lester Lundie
Physiological Characterization Of Clostridium Thermoaceticum Cultivated On A Chemically Defined Medium, Leon Lester Lundie
Electronic Theses and Dissertations
No abstract provided.
Distribution And Petrology Of Clinoptilolite Of The Tallahatta Formation (Middle Eocene) Of Clarke County, Alabama / By James R. Spencer, James R. Spencer
Distribution And Petrology Of Clinoptilolite Of The Tallahatta Formation (Middle Eocene) Of Clarke County, Alabama / By James R. Spencer, James R. Spencer
Electronic Theses and Dissertations
No abstract provided.
Folacin Values In Food, Eddie Mitchell Lancaster
Folacin Values In Food, Eddie Mitchell Lancaster
Electronic Theses and Dissertations
No abstract provided.
Neutron Activation Analysis For Trace Metal Content Of Brookings Sludge For Land Application, Daniel George Dewall
Neutron Activation Analysis For Trace Metal Content Of Brookings Sludge For Land Application, Daniel George Dewall
Electronic Theses and Dissertations
The Federal Environmental Protection Agency (EPA) strongly favors land application of sludge as a disposal method and requires communities to consider the application of sewage wastes to land as one of their alternatives to advanced wastewater treatment in order to be eligible for federal funding to improve sewage wastewater treatment facilities. Although use of sewage sludge on the land has definite benefits, several potential problems may develop when applying this method of disposal. One main concern has been the possibility of toxic metal pollution occurring in the application soils. If high concentrations of zinc, copper, lead, cadmium, etc. are present …
Determination Of Body Density Of College-Age Women Using Circumference Measurements, Melinda J. Robins
Determination Of Body Density Of College-Age Women Using Circumference Measurements, Melinda J. Robins
Electronic Theses and Dissertations
The purpose of this investigation was to determine an effective and simple method of estimating body density of college-age women (n=51), ages 18 to 26 years, using age and selected circumference measurements (thorax, waist, abdomen, hip, gluteal fold and thigh). Two subproblems were also investigated. The first subproblem was to determine if the sum of the selected circumferences was a better predictor of body density than when each circumference was used individually as a predictor. The second subproblem was to determine if body density could best be predicted by a linear or curvilinear relationship. Statistical analysis of the data included …
Spectral Analysis Of Human Cardiac Inter-Beat Interval During Rest, Stress-Anticipation, And Stressor Periods, Glenda Lucille Cottam
Spectral Analysis Of Human Cardiac Inter-Beat Interval During Rest, Stress-Anticipation, And Stressor Periods, Glenda Lucille Cottam
Electronic Theses and Dissertations
No abstract provided.
Photoinduction Of Floral Development In Hard Red Winter Wheat, Jose Ernesto Robles Wijangco
Photoinduction Of Floral Development In Hard Red Winter Wheat, Jose Ernesto Robles Wijangco
Electronic Theses and Dissertations
South Dakota is at the northern limit of winter wheat cultivation in the United States. However, it has been estimated that only 15% of the total winter wheat acreage has been planted to hardy winter wheat cultivars in this state. Records at this station indicate that grain yields of winter hardy cultivars can be 20 to 40% lower than less hardy cultivars in the absence of severe freeze stress. Low grain yields of hardy types is one reason for low preference of these phenotypes by growers. Hardy cultivars usually head late compared to less hardy ones. With late initiation of …
The Effect Of Photoperiod On Reproduction Of Targhee Ewes, Richard D. Rogen
The Effect Of Photoperiod On Reproduction Of Targhee Ewes, Richard D. Rogen
Electronic Theses and Dissertations
Seasonality of reproduction in sheep has created an oscillating supply of lambs. A more constant supply of lambs would allow more efficient use of facilities and labor by producers, feedlots and packing plants. Seasonal reproduction also limits the lifetime production of the ewe. Extension of the breeding season would provide a more consistent supply of lambs. In addition, more than one lamb crop per ewe could be produced annually. Not only the yearly lamb production but also the lifetime production of the ewe would then be increased. Also, the generation interval would be shortened allowing faster herd improvement. It is …
Protein Supplementation As Related To Protein Sources For Growing And Finishing Lambs, Luis Fernando Palmer
Protein Supplementation As Related To Protein Sources For Growing And Finishing Lambs, Luis Fernando Palmer
Electronic Theses and Dissertations
The production of high-quality foods continues to offer an important challenge to livestock producers and animal scientists. People in many countries of the world consume diets which are inadequate in quantity and quality of nutrients. The animal industry plays a major role as a supplier of high-quality foods such as meat, milk and eggs for human nutrition. Protein is perhaps the most important nutrient provided by animal products because of its quality and availability in relation to human needs. Ruminants such as cattle and sheep have the unique ability to convert low quality feedstuffs to high quality food as animal …
A Comparison Of Heath And Carter's Somatotyping To Body Composition In 30 To 40 Year Old Caucasian Males, Cheryl L. Miller
A Comparison Of Heath And Carter's Somatotyping To Body Composition In 30 To 40 Year Old Caucasian Males, Cheryl L. Miller
Electronic Theses and Dissertations
The purpose of this study was to determine the relationship between Heath and Carter's Modified Somatotype Method and body composition in 30 to 40 year old caucasian males. The following hypotheses were investigated: 1. It was hypothesized that there is a significant relationship between Heath and Carter's first component and per cent body fat. 2. It was hypothesized that there is a significant but low relationship between Heath and Carter's second component and lean body mass or lean body mass/height. 3. It was hypothesized that there is a significant relationship between Heath and Carter's third component and linearity. The subjects …
Immunotoxic Effects Of Pentachlorophenol In Mice, Linda J. Lee
Immunotoxic Effects Of Pentachlorophenol In Mice, Linda J. Lee
Electronic Theses and Dissertations
The objectives of this investigation was to determine the effects of ingested pentachlorophenol (PCP) on immunological parameters in mice. Specific immunotoxic effects of PCP were determined using the results of total and differential white blood cell counts, electrophoretic serum protein profiles, hemagglutination antibody titers, Jerne plaque assays of antibody-forming cells, and lymphocyte stimulation assays. Combined ~vivo effects were ascertained by observing any alteration in the susceptibility of mice when challenged by a Gram negative pathogen. The diverse industrial and agricultural application of pentachlorophenol results in the exposure of a large fraction of the population to this pesticide. It is used …
The Effect Of Nitrogen Fertilization On Grain Protein Content And Yield Of Spring Wheat In South Dakota, Syed Dara Tazul Islam
The Effect Of Nitrogen Fertilization On Grain Protein Content And Yield Of Spring Wheat In South Dakota, Syed Dara Tazul Islam
Electronic Theses and Dissertations
It has been predicted that the cost of nitrogen fertilizer will soon triple. Consequently, N management by wheat growers in South Dakota will be even more critical than it has been in the past. Nitrogen is one of the most limiting nutrients for wheat production in South Dakota. Many of the spring wheat producers fail to take advantage of nitrogen fertilizer recommendations based on soil testing. Therefore, it is likely that a simple post-harvest method of determining if adequate N was present for wheat crop would be very beneficial to spring wheat producers. One such method is using grain protein …
The Effects Of Excess Arginine On Lysine Utilization In Rats And Swine, David L. Hagemeier
The Effects Of Excess Arginine On Lysine Utilization In Rats And Swine, David L. Hagemeier
Electronic Theses and Dissertations
The objective of adding supplemental protein to swine diets is to provide the levels of available essential amino acids and nitrogen necessary for maximum protein synthesis in the pig. Lysine has been determined to be the limiting amino acid in many swine diets. Thus, the real objective of protein supplementation is to provide the amount of lysine necessary for maximum protein synthesis, and if this objective is met the requirements for the other essential amino acids and nitrogen will generally be met. Since swine diets are formulated to meet the lysine requirement of the pig, it is necessary to derive …
Repeatability Of Cow Efficiency, Weaning Weight And Milk Production In Angus, Charolais And Reciprocal Cross Cows, Brent A. Buckley
Repeatability Of Cow Efficiency, Weaning Weight And Milk Production In Angus, Charolais And Reciprocal Cross Cows, Brent A. Buckley
Electronic Theses and Dissertations
In this day of increasing population and decreasing natural resources, man must continually search for more efficient methods of producing foodstuffs. The livestock industry must continue to improve its efficiency of production to remain a profitable producer of protein for the human populace. The pork and poultry industry have increased their efficiency of production through extensive use of cereal grains which could be utilized as human foodstuffs. Beef cattle, on the other hand, have the capability to utilize high roughage feedstuffs, such as grasses or crop residues, which are unavailable for human digestion. The beef cow, in particular, spends the …
Changes And Adaptations In South Dakota School Lunch Programs Following Reduced Federal Funding, Verdell Evonne Beste
Changes And Adaptations In South Dakota School Lunch Programs Following Reduced Federal Funding, Verdell Evonne Beste
Electronic Theses and Dissertations
The purpose of the study was to document changes and adaptations occurring in South Dakota School Lunch Programs following decreased federal funding. A survey was administered to 152 school food service workers, representing 72 school districts, during the 1982 School I Food Service Certification Workshop at South Dakota State University in Brookings, South Dakota. Demographic as well as lunch program information was obtained from the multiple choice and/or open-end question survey. Findings indicated lower participation in programs charging higher lunch prices. Schools serving over 500 noon lunches daily were more likely to use one or more methods to increase participation. …
Aquatic Plant Communities And Invertebrates In A Prairie Pothole During Duck Brood Rearing, Jeffrey W. Mccrady
Aquatic Plant Communities And Invertebrates In A Prairie Pothole During Duck Brood Rearing, Jeffrey W. Mccrady
Electronic Theses and Dissertations
More than 1,100 samples of aquatic plants and associated invertebrates were collected in a prairie wetland. Sampling was done weekly throughout the duck brood rearing season. Linear regression revealed a 4 to 100 ratio of animal to plant biomass (R²=0.488). Comparatively high degrees of association were found between Ceratophyllum demersum and Gastropoda and between Lemna minor and most zooplankton groups. Significant sources of variation in invertebrate biomass were plant communities, date, plants, and community by date interaction. Depth and communities were not significant.
Movements And Habitats Of Brood-Rearing Wood Ducks On A Prairie River, Randy L. Smith
Movements And Habitats Of Brood-Rearing Wood Ducks On A Prairie River, Randy L. Smith
Electronic Theses and Dissertations
Radio telemetry and brood surveys were used to evaluate wood duck (Aix sponsa) brood habitat and movements along 40 km of the Big Sioux River in eastern South Dakota during 1979-81. Most of the oxbows and nearby wetlands in the study area contained water in 1979-80, but drought dried all but 2 of the 33 oxbows in 1981. Fourteen brood hens were radio monitored. In 1980, 4 hens utilized oxbows, 1 hen utilized the river, and 2 hens used other habitats for brood rearing. In 1981, 4 hens utilized oxbows, 2 hens utilized the river, and 1 hen utilized the …
Growth Hormone Variability And Its Predictive Value In Beef Females, Thomas W. Lingscheit
Growth Hormone Variability And Its Predictive Value In Beef Females, Thomas W. Lingscheit
Electronic Theses and Dissertations
Endocrine influence on metabolism determines the rate and extent of growth of an animal. A thorough understanding of hormones and their influence is necessary to the meat animal industry for advancement of efficient production to supply a growing world demand for food. Many hormones affect metabolism, but growth hormone (GH) appears to have one of the smallest fluctuations in circulating levels. Previous research indicates nonsignificant changes in plasma growth hormone (GH) due to season, circadian rhythm or level of nutrient intake. Factors that have been identified a s influencing GH level are sex, age, roughage content of the diet, breed, …
The Response Of The Face Fly (Musca Automnalis) To Seasonal Changes In Manure Quality, Timothy James Lysyk
The Response Of The Face Fly (Musca Automnalis) To Seasonal Changes In Manure Quality, Timothy James Lysyk
Electronic Theses and Dissertations
The face fly is a major pest of cattle in East Central South Dakota. The female fly feeds on the faces of cattle and lays eggs in freshly deposited manure. Preference is shown for the manure of animals fed grass. The egg and larval stages are spent in the manure, and the mature larvae migrate to the surrounding substrate to pupate. While in the pats, the face fly stages present have been shown to be sensitive to a number of physical, chemical and biotic factors. The manure pat acts as both a source of food and as a habitat for …
A Short-Run Economic Analysis Of Some Factors Influencing The Supply Of Beef-Cattle At Auctions In South-Eastern Botswana, 1976-1980, Kene Patrick Cyril Sinombe
A Short-Run Economic Analysis Of Some Factors Influencing The Supply Of Beef-Cattle At Auctions In South-Eastern Botswana, 1976-1980, Kene Patrick Cyril Sinombe
Electronic Theses and Dissertations
Auction sales provide a major cattle marketing outlet for farmers in Botswana. There were 5,740 cattle auctioned in the South-eastern part of Botswana in 1976. This number represented 16% of the total export off-take from the area. The main market outlet for slaughter beef is through direct marketing of cattle to the Botswana Meat Commission (BMC) abattoir. The BMC, an export monopoly beef marketing board, sets prices and cattle buyers country-wide adjust them to derive producer prices, because they finally sell cattle to the BMC. The BMC price plays a major role in deriving producer prices at auction sales yards. …
Composition, Biomass, And Protein Content Of A Lemna Trisulca L., Invertebrate Community In A Prairie Wetland, Linda J. Meyers
Composition, Biomass, And Protein Content Of A Lemna Trisulca L., Invertebrate Community In A Prairie Wetland, Linda J. Meyers
Electronic Theses and Dissertations
Samples of star duckweed (Lemna trisulca L.) were collected from a South Dakota prairie wetland during the summer 1981. Amphipods and gastropods were the dominant macroinvertebrates found within samples of duckweed in terms of biomass and density. Cladocera were the dominant microinvertebrates found in association with star duckweed. Significant variability was found in the biomass and densities of specific invertebrates with respect to sampling dates. Crude protein values of star duckweed-invertebrate community samples ranged from 7.6 to 18.5% and were found to correlate significantly with protein levels of the duckweed. Crude protein values for star duckweed ranged from 7.1 to …
Culture Of Channel Catfish In East-Central South Dakota Dugout Ponds, Martin Nicholas Dilauro
Culture Of Channel Catfish In East-Central South Dakota Dugout Ponds, Martin Nicholas Dilauro
Electronic Theses and Dissertations
Twenty dugout ponds in east-central South Dakota were stocked 10 May 1980 with fingerling (mean weight 39.4 g, mean total length 108.4 mm) channel catfish (Ictalurus punctatus) at stocking rates of 309, 618, 1,235, and 1,853 fish/ha. Supplemental food was provided in 16 ponds (four at each stocking rate) at a rate of 4% body weight every other day. Fish in four ponds stocked, one at each of the respective stocking rates were not fed. Eleven of the 16 ponds which received feed were considered fit for analysis at the end of the study period, 27 September 1980. Two of …
Survival, Growth, Food Selection, And Alimentary Canal Development Of Intensively Reared Walleyes And Yellow Perch, Gregg Alan Raisanen
Survival, Growth, Food Selection, And Alimentary Canal Development Of Intensively Reared Walleyes And Yellow Perch, Gregg Alan Raisanen
Electronic Theses and Dissertations
Five genera of invertebrates, collected from a municipal sewage lagoon, were fed to newly hatched larval walleyes, (Stizostedion vitreun vitreun), and yellow perch, (Perca flavescens), to document survival, growth, food selection, and alimentary canal development of these fishes. Mean survival of walleyes for the 18 day period after hatching was 14.1%: mean unaccountable mortality was 43.5%. Forty-three percent of the walleyes remaining after 18 days survived an additional 32 days; mean unaccountable mortality was 33.8%. Mean daily length gain over the 50 day period was 0.8 mm/day. The cladoceran, Moina brachiate, was selected for by walleyes and yellow perch; the …