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Articles 1291 - 1320 of 1392
Full-Text Articles in Animal Sciences
Evaluation Of Orally Administered Sodium D-Thyroxine As A Teratogen In New Zealand White Rabbits, Gary A. Thibodeau
Evaluation Of Orally Administered Sodium D-Thyroxine As A Teratogen In New Zealand White Rabbits, Gary A. Thibodeau
Electronic Theses and Dissertations
Sodium D-thyroxine was evaluated for possible embryotoxic and/or teratogenic effects following oral administration in New Zealand White rabbits. All animals utilized were alert, active and apparently disease-free virgin does weighing three and one-half to four kilograms. Rabbits were individually housed in stainless steel batteries and maintained on a commercially available palletized diet and mineral supplement. Feed and water were provided ad libitum in animal quarters air conditioned to minimize environmental temperature fluctuations. Following a 14-day post-delivery observation period does were bred to New Zealand White bucks and randomly allocated to one of two experimental groups or the control group each …
Effects Of Various Factors On The Rachitogenic Activity Of Isolated Soy Protein, Donald James Arshem
Effects Of Various Factors On The Rachitogenic Activity Of Isolated Soy Protein, Donald James Arshem
Electronic Theses and Dissertations
The nature of the rachitogenic activity of isolated soy protein was investigated in fifteen studies. A RP-100-glucose purified diet was fed to day-old turkey poults housed in stainless steel batteries. Feed and water were provided ad libitum. Corn, oat hulls, solvent-extracted soybean meal, full-fat extruded soybeans, C-1 protein, casein and texturized forms of soy protein were added to the basal diet at various levels. All feedstuffs were added at two particle sizes: natural form of the feedstuff (>250 u); and ground in a ball mill (<250 >u). The effects of autoclaving for 60 minutes at 120°C were also investigated. …
Effects Of Various Levels Of Dietary Selenium And Arsenic On Chickens, Richard L. Arnold
Effects Of Various Levels Of Dietary Selenium And Arsenic On Chickens, Richard L. Arnold
Electronic Theses and Dissertations
Various levels of selenium and arsenic additions were made to several types of chicken diets to study their effects on growth and reproduction criteria. Three experiments were conducted. The first study involved day-old chicks and terminated at 64 weeks of age. These yearling hens were then used for the second experiments which terminated when the hens were 104 weeks old. The third study was initiated with 20 week old pullets and terminated when they were 52 weeks old. Feeding purified diets resulted in slower chick growth and lower mature body weights of hens. Selenium additions of 2.0 ppm resulted in …
Effects Of Feeding Leptaden To Dairy Cows, Sitakantha Dash
Effects Of Feeding Leptaden To Dairy Cows, Sitakantha Dash
Electronic Theses and Dissertations
Leptaden is a herbal drug which was recently introduced to the market by Alarsin Pharmaceuticals, Bombay, India. It consists of the extracts of two indigenous medical plants, namely Leotadenia reticulata (Jeevanti) and Breynia patens (Kamboji) in equal proportions. In 1947, Patel first drew the attention of gynaecologists to the usefulness of Leptaden in habitual abortions and allied conditions in women and later on pointed out its lactogenic and galactagogue properties. His original observations are supported by growing clinical experience over a twenty year period of medical practice. Published clinical experience shows that in most cases Leptaden stimulates, lactation within twelve …
Temperature Computer Measurements, Production And Carcass Traits Of Individually Fed Weight Constant Steers, Lowell M. Anderson
Temperature Computer Measurements, Production And Carcass Traits Of Individually Fed Weight Constant Steers, Lowell M. Anderson
Electronic Theses and Dissertations
During 1968, 29 Hereford steers were individually fed and marketed at one of seven constant weight classes from approximately 386 to 522 kg at intervals of 22.7 kg. During 1970, 21 Angus and Hereford crossbred steers were individually fed and marketed at one of four constant weight classes from approximately 386 to 522 kg at intervals of approximately 45.0 kg. The amounts of edible portion, trimmed fat, removed bone and the summation of the kidney, pelvic, and cod fat were determined on the steers of both years. In 1970 two experiments examined the usefulness of an analog computer for calculation …
Roasted Soybeans For Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, Richard Berns
Roasted Soybeans For Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, Richard Berns
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Soybeans contain about 18% fat. In the past it has been economical to process the soybeans into soybean meal. Soybean meal is the major protein supplement fed to swine. The recent development of new equipment to cook soybeans on the farm has resulted in a renewed interest in the use of cooked soybeans in swine rations. The objectives of the study reported here were to compare the performance of pigs fed whole soybean meal and to study the effects of whole soybeans on the carcasses produced.
Protein And Lysine Levels In Growing-Finishing Swine Rations, R. C. Wahlstrom, G. W. Libal, J. F. Fredrikson
Protein And Lysine Levels In Growing-Finishing Swine Rations, R. C. Wahlstrom, G. W. Libal, J. F. Fredrikson
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Cereal grains are particularly low in lysine, one of the essential amino acids, and a protein supplement must be fed with grains to supply additional lysine as well as other amino acids. The purpose of the experiment reported herein was to study the performance of growing and finishing pigs when fed rations of different protein content with and without additional lysine supplementation.
Feeding Stalls For Brood Sows, George W. Libal, Richard C. Wahlstrom, J. W. Mccarty
Feeding Stalls For Brood Sows, George W. Libal, Richard C. Wahlstrom, J. W. Mccarty
South Dakota Swine Field Day Proceedings and Research Reports, 1970
How to assure that each sow gets her fair share of feed and how to control the "boss" sows are management problems facing the producer who is limit feeding groups of sows in order to get maximum litter size and minimum gestation feed costs. Feeding stalls have proven very effective in achieving both of these objectives. There are several types of commercial stalls on the market as well as several good designs for homemade feeding stalls. The type used South Dakota State University has drawn considerable interest by producers and many have asked for material lists and costs. These stalls …
The Influence Of Energy During Estrus Of On Ovulation Rate, Goerge W. Libal, Richard C. Wahlstrom
The Influence Of Energy During Estrus Of On Ovulation Rate, Goerge W. Libal, Richard C. Wahlstrom
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Recently, English workers have reported that when sows or gilts that were being limit fed (3 to 4 lb. per day) were allowed a double quantity of feed only on the first feed following breeding the number of ovum shed was increased. When sows were allowed to complete gestation, litter size was larger by approximately 2 pigs. The experiment reported herein was an attempt to duplicate the English work and evaluate this method of "flushing" under South Dakota conditions.
A Study Of Diet Preference By Early Weaned Pigs, Larry Hauser, Richard C. Wahlstrom
A Study Of Diet Preference By Early Weaned Pigs, Larry Hauser, Richard C. Wahlstrom
South Dakota Swine Field Day Proceedings and Research Reports, 1970
The trial reported here was designed to compare the single-stimulus method of palatability testing with the free-choice selection method and to determine the effects of partially delactosed whey, with and without sugar, on the gain and feed efficiency of early weaned pigs.
Effect Of Environment, Sex And Protein Level Of Ration On Performance And Carcass Characteristics Of Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, Jacob F. Fredrikson
Effect Of Environment, Sex And Protein Level Of Ration On Performance And Carcass Characteristics Of Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal, Jacob F. Fredrikson
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Research conducted at the Southeast South Dakota Experiment Farm during the winter of 1968-69 and reported at the 1969 Swine Field Day (A.S. Series 69-38) indicated that the performance of pigs fed rations containing 15% protein to about 115 lb. and 12% protein to market weight was equal to that of pigs fed a ration 17% protein to 115 lb. reduced to 14% protein from 110 lb. to market weight. In the previous trial about 9% more feed was required for those pigs fed in the uncontrolled environment; however, rate of gain was not affected by the type of housing. …
Review Of Research Of The Value Of High Moisture Corn For Growing And Finishing Swine, L. J. Kortan
Review Of Research Of The Value Of High Moisture Corn For Growing And Finishing Swine, L. J. Kortan
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Work at South Dakota State University during the 10 year period 1942-1951 with soft corn for growing-finishing pigs showed that hogs are well adapted to utilize soft corn. In all six trials during this period, pigs fed soft corn showed a lower rate of gain per day than the pigs fed hard corn. However, when the soft corn was dried and fed, the pigs made practically the same rate of gain as the pigs fed hard corn. Compared on a dry matter basis, the value of soft corn was practically equal to hard corn for growing pigs. However, the pigs …
High-Lysine Corn In Growing-Finishing Swine Rations, Keith E. Gilster, Richard C. Wahlstrom
High-Lysine Corn In Growing-Finishing Swine Rations, Keith E. Gilster, Richard C. Wahlstrom
South Dakota Swine Field Day Proceedings and Research Reports, 1970
The objectives of this experiment were to compare the performance and carcass characteristics of growing-finishing pigs fed rations of normal or opaque-2 corn containing recommend and low levels of protein.
High Lysine Corn Fed Free-Choice To Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal
High Lysine Corn Fed Free-Choice To Growing-Finishing Swine, Richard C. Wahlstrom, George W. Libal
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Analyses of opaque-2 corn have indicated a higher content of lysine and tryptophane than found in normal corn. Since these two amino acids are the most limiting amino acids in most practical swine diets, opaque-2 corn should permit a reduction in the need for supplementary protein. Experiments conducted at the South Dakota Agricultural Experiment Station and at other Experiment Stations have shown this to be true, with less protein supplement needed in swine rations containing opaque-2 corn than in rations containing normal corn.
The Effect Of Gestation Energy Levels On Reproductive Performance Of Sows And Gilts, George W. Libal, Richard C. Wahlstrom
The Effect Of Gestation Energy Levels On Reproductive Performance Of Sows And Gilts, George W. Libal, Richard C. Wahlstrom
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Restricting energy on total feed intake has been accepted as a desirable management pract ice for gestating sows and gilts. The advantages are reduced feed costs during gestation and larger and stronger litters resulting from more proper nutrition of the gestating sow. The common practice of reducing total feed level quite of ten reduces daily intake of energy protein and many of the other nutrients required by the sow. The experiment reported herein is an attempt to establish minimum required levels of metabolize energy for gestating sows and gilts under both summer and winter conditions. These sows will be maintained …
Fourteenth Annual Swine Field Day 1970 Complete Report, Animal Science Department
Fourteenth Annual Swine Field Day 1970 Complete Report, Animal Science Department
South Dakota Swine Field Day Proceedings and Research Reports, 1970
These are the complete proceedings of the fourteenth annual South Dakota Swine Field Day held on November 19, 1970 at South Dakota State University.
Vitamin E, Copper, And Tylosin In The Diets Of Growing-Finishing Swine, George E. Libal, Richard C. Wahlstrom
Vitamin E, Copper, And Tylosin In The Diets Of Growing-Finishing Swine, George E. Libal, Richard C. Wahlstrom
South Dakota Swine Field Day Proceedings and Research Reports, 1970
Recent research with growing pigs has shown that vitamin E may be deficient in some corn-soybean meal diets. Some possible reasons why vitamin E deficiencies are being experienced today are that fewer pigs are fed on pasture, which is a good source of vitamin E; more corn is being picked wet and then artificially dried, which can destroy vitamin E; and the presence of a low selenium content of corn.
Copper has been shown to produce a growth response similar to antibiotics when it is fed at levels of 125 to 250 ppm. the study reported herein was conducted during …
The Effect Of Tylosin And A Combination Of Diethylstilbestrol And Methyltestosterone On Performance And Carcass Characteristics Of Finishing Pigs, Richard C. Wahlstrom, George W. Libal
The Effect Of Tylosin And A Combination Of Diethylstilbestrol And Methyltestosterone On Performance And Carcass Characteristics Of Finishing Pigs, Richard C. Wahlstrom, George W. Libal
South Dakota Swine Field Day Proceedings and Research Reports, 1970
This experiment was conducted to obtain further information on the effect of feeding these hormones at a higher level during the first half of the finishing period (100 to 150 lb.) and reducing the level fed for the last half of the period.
Wheat In Swine Finishing Rations, J. W. Mccarty, R. C. Wahlstrom, A. E. Dittman
Wheat In Swine Finishing Rations, J. W. Mccarty, R. C. Wahlstrom, A. E. Dittman
South Dakota Swine Field Day Proceedings and Research Reports, 1970
The objectives of the trial reported here were:
1. To compare the performance of pigs fed rations with the same proportions of grain and supplement but with the grain corn in one rations and wheat in another ration.
2. To assess the possible feeding value of wheat's greater protein content by use of an all wheat ration in which there was a lower level of supplemental protein.
3. To assess the value of lysine in wheat rations by the effition of lysine to the same ration as used for comparison 2 (above).
Influence Of Temporary Chemical Immobilization Of Boar Spermatozoa Upon In Vitro Survival, W. L. Singleton, T. D. Rich
Influence Of Temporary Chemical Immobilization Of Boar Spermatozoa Upon In Vitro Survival, W. L. Singleton, T. D. Rich
South Dakota Swine Field Day Proceedings and Research Reports, 1970
The use of artificial insemination (AI) in swine has been restricted because of the inability to store semen. It is usually recommended that for AI use boar semen not be stored more than 48 hours. Obviously, the goal is to develop a technique whereby boar semen could be stored indefinitely such as is the case with bull semen. However, until such a technique is developed, a method of storing boar semen for a few days would be of value for promoting AI in swine.
1970 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
1970 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.
Flavor Preference And Stability Of A Low-Fat Dairy Spread, James Robert Miller
Flavor Preference And Stability Of A Low-Fat Dairy Spread, James Robert Miller
Electronic Theses and Dissertations
Low-fat dairy spread has been defined as a product which contains only dairy ingredients and has a lower fat content than the commonly used spreads, butter and margarine (5). Although some low-fat spreads have contained very little fat, most of those which have been developed during the past 30 years have contained about one-third to two-thirds as much fat as the commonly used spreads and have had a higher protein content. ·The low-fat dairy spread studied in this project contained about ten times more protein and only one-half as much fat as butter and margarine. The present day justification of …
Abnormal Milk Evaluations In Eastern South Dakota Milk Plants And Dairy Herds, Edwin J. Kleen
Abnormal Milk Evaluations In Eastern South Dakota Milk Plants And Dairy Herds, Edwin J. Kleen
Electronic Theses and Dissertations
For many years bovine mastitis has been a major problem for dairy producers, the seriousness of which can be measured by the volumes of literature which have been written about it as well as the economic losses incurred by the dairy industry because of it. The fact that mastitis is still a virulent disease in spite of the vast amount of research conducted on it would suggest either that the underlying causes of mastitis still are not completely understood or that the knowledge gained through research has not been presented effectively to those who need it most—namely the dairy farmer. …
Effect Of Days Open On Lactation Production, Roger L. Ripley
Effect Of Days Open On Lactation Production, Roger L. Ripley
Electronic Theses and Dissertations
Accurate evaluation of dairy production records is essential if dairymen are to establish and maintain profitable dairy herds and efficient culling programs. Improper record evaluation may result in. saving breeding stock that otherwise might be eliminated. Many factors may influence the validity of individual production records. Adjustment factors, currently in use by the United States Department of Agriculture (USDA) for sire and cow evaluations, are generally accepted as removing the majority of these influences. Consequently, these factors are invaluable to practical dairymen. The adjustment factors, suggested by McDaniel, et al. (24) in 1967, take into account the geographical location, season …
The Effect Of Harvesting And Storage Methods On Chemical Composition And In Vitro Digestibility Of First Cutting Alfalfa Hay, Perry A. Fales
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 …
1969 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
1969 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.
Indoor Versus Outdoor Calf Rearing At Three Weaning Ages, Larry J. Jorgenson
Indoor Versus Outdoor Calf Rearing At Three Weaning Ages, Larry J. Jorgenson
Electronic Theses and Dissertations
In order to be profitable, a dairy herb must have good heifers to meet replacement needs. According to USDA (51), these needs are substantial because 25% of the cows in an average herd must be replaced each year as they no longer return a profit. Meeting these herd replacement needs has long been a serious problem of the dairyman. Nation-wide calf loss estimates ranged between 8 and 25% with an estimated annual loss to the industry of $50 million (10). South Dakota dairymen are not immune to these mortality losses and some studies (28, 52) indicate that their losses may …
A Comparison Of Cheese Yields Produced From Normal And Abnormal Milk, Raymond L. Rennich
A Comparison Of Cheese Yields Produced From Normal And Abnormal Milk, Raymond L. Rennich
Electronic Theses and Dissertations
Mastitis has long been a problem to the Dairy Industry. All milk constituents are affected. Abnormal milk usually has a slightly higher total nitrogen and a lower casein content than does normal milk. Since the percent casein is believed to have the greatest influence on the yield of cheese, it is postulated a lower casein content in milk will produce a proportionately smaller amount of cheese for a given volume of milk. Cheese factories presently buy milk on the basis of fat percentage and weight with no regard to the amount of total protein or casein present. Therefore, it would …
Vitamin A In Beef Cattle Feeding, L.B. Embry, L.J. Kortan
Vitamin A In Beef Cattle Feeding, L.B. Embry, L.J. Kortan
Agricultural Experiment Station Animal Husbandry Pamphlets
Vitamin A is essential for all cattle. The vitamin does not occur naturally in feeds of plant origin. Many cattle are never fed vitamin A as such but do not develop a deficiency of the vitamin. The reason for this is that many feeds (pasture, good quality hay, silage, and yellow com) furnish carotene which is converted to vitamin A in the animal body.
1968 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
1968 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.