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Articles 5401 - 5430 of 8048
Full-Text Articles in Entire DC Network
Fifteenth Annual Cattle Feeders Day, Animal Science Department
Fifteenth Annual Cattle Feeders Day, Animal Science Department
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
These are the complete proceedings of the fifteenth annual Cattle Feeders Day held on October 1, 1971 at South Dakota State University.
Pine Sawdust As A Roughage Replacement In Feeder Cattle Diets, A. L. Slyter, L. D. Kamstra
Pine Sawdust As A Roughage Replacement In Feeder Cattle Diets, A. L. Slyter, L. D. Kamstra
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
Eight lots, five or six heifers each, (42 heifers total) were fed one of four diets for 119 days to study the effect of sawdust inclusion in a growing diet on the performance of feeder calves. The diets were alfalfa-concentrate, sawdust-concentrate, corn silage and sawdust silage. (See table 1 for specific diet composition). Trace mineral salt and dicalcium phosphate were fed free choice and vitamin A was supplemented to provide a calculated 10,000 to 12,000 I.U. per head per day. Brome-alfalfa loose hay was provided for the first week during adaptation to the experimental diets.
Dry And High-Moisture Grain Fed Whole Or Rolled With Hay Or Haylage In Cattle Finishing Diets, J. D. Burkhardt, L. B. Embry
Dry And High-Moisture Grain Fed Whole Or Rolled With Hay Or Haylage In Cattle Finishing Diets, J. D. Burkhardt, L. B. Embry
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
In a previous experiment (A.S. Series 70-20 ) , steers were fed dry or reconstituted high-moisture corn grain , whole or rolled , at 1 lb . per 100 lb . of body weight with alfalfa-brome hay or reconstituted haylage to appetite from weights of about 500 to 825 lb . Higher rates of gain with lower feed requirements were obtained with high-moisture corn and haylage than from dry corn and hay. The greatest benefits from the moist feeds resulted when high-moisture corn and haylage were fed together. There appeared to be a slight advantage for rolling the corn under …
Weaning Age And Management Systems For Fall Born Beef Calves, William Mccone
Weaning Age And Management Systems For Fall Born Beef Calves, William Mccone
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
Twenty-eight registered Angus and Hereford cows calved in September, 1970. The cows calved on pasture and remained on pasture until late November. From November 10 to December 28 the cows were bred for 1971 and started on a self-fed diet. The remaining 14, or one-half of the calves, were allowed to continue nursing the cows, but the calves also had access to calf creep with the same diet used for the weaned calves. At the start of the experiment the calves were randomly divided by sex, breed and age. At this time, December 30, 1970, the average age of all …
Urea Vs. Soybean Meal During Feedlot Adaptation And Later Growing And Finishing, J. D. Burkhardt
Urea Vs. Soybean Meal During Feedlot Adaptation And Later Growing And Finishing, J. D. Burkhardt
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
Urea is a common ingredient in cattle diets. While this nonprotein nitrogren compound is a satisfactory source of supplemental protein in many cattle diets, there are limitations as to levels in the diet and conditions of use. The primary basis for the use of urea as a substitute for conventional high-protein ingredients is the lower cost for protein supplementation.
Dry And High-Moisture Corn Fed Whole Or Rolled With Corn Silage In Cattle Growing-Finishing Diets, J. D. Burkhardt, L. B. Embry
Dry And High-Moisture Corn Fed Whole Or Rolled With Corn Silage In Cattle Growing-Finishing Diets, J. D. Burkhardt, L. B. Embry
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
One area of research in beef cattle feeding that is receiving major emphasis at this station is the comparative value of dry and high-moisture grain under various conditions of use and the benefits of processing in comparison to feeding as whole grain. Previous research has involved levels of roughage and moisture content of the roughage (hay or haylage).
In this experiment, dry or high-moisture corn grain was fed whole and rolled with a limited feed of corn silage with urea or soybean meal furnishing the supplemental protein.
Feedlot Bulls And Steers Treated With Diethylstilbestrol And Zeranol, P. J. Thiex
Feedlot Bulls And Steers Treated With Diethylstilbestrol And Zeranol, P. J. Thiex
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
This experiment is one of a series to study effects of castration, growth stimulating compounds and various feeding and management systems on performance and carcass characteristics of feedlot male and female cattle. It involved a comparison of bulls with steers and their response to diethylstilbestrol or zeranol (a resorcyclic acid lactone compound shown to have growth stimulating properties) implants when fed high-concentrate diets.
Types Of Urea Supplement For Wintering Beef Calves, A. L. Slyter, L. B. Embry, J. Herndon
Types Of Urea Supplement For Wintering Beef Calves, A. L. Slyter, L. B. Embry, J. Herndon
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
Previous research at the Cottonwood Station showed that calves fed low levels of urea during an adaptation period made faster gains than unadapted calves when fed higher levels of urea during the wintering period. Calves fed a corn-base urea supplement in pellet form gained faster than those fed a commercial, molasses-base urea supplement in liquid form. The following tow experiments were conducted as replications of those reported previously under this title.
Sulfur Supplementation With Urea As The Supplemental Protein With Corn Silage Or Ear Corn Diets For Beef Steers, L. B. Embry, R. M. Luther, J. F. Fredrikson
Sulfur Supplementation With Urea As The Supplemental Protein With Corn Silage Or Ear Corn Diets For Beef Steers, L. B. Embry, R. M. Luther, J. F. Fredrikson
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
This experiment was conducted to determined the need for a sulfur supplement with urea used as the primary supplemental protein in corn silage or ear corn diets for growing and finishing steers. Supplements which contained one part of sulfur to 10 or 20 parts nitrogen from the urea were compared to a urea supplement without added sulfur and to a low-protein corn supplement fed at the same level. The experiment consisted of a corn silage feeding phase of about 4 months and a ground ear corn phase of about 6 months.
Dry And High-Moisture Corn As Affected By Processing And Type Of Diet, L. B. Embry, J. D. Burkhardt
Dry And High-Moisture Corn As Affected By Processing And Type Of Diet, L. B. Embry, J. D. Burkhardt
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
High-moisture grains have received considerable emphasis in cattle feeding research and by feedlot operators during recent years. Large quantities of grain are harvested at high-moisture contents because of harvesting and other advantages associated with the high-moisture content or because of unfavorable natural drying conditions. Drying grain is expensive, and it would appear that first consideration should be given to storing and using the grain in the high-moisture form if it is to be fed livestock.
Storing High Moisture Grain, James J. O'Connell
Storing High Moisture Grain, James J. O'Connell
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
For the past several years there has been increased interest in the harvesting and storing of high-moisture feed grains, particularly corn, barley and grain sorghum. With improved silos and grain harvesting equipment, the use of high-moisture grains has replaced the conventional methods of harvesting, storing and feeding grains on many cattle feeding farms. There are several reasons why this system is becoming more popular. Harvesting can be done earlier and faster, harvesting losses are reduced, and a minimum number of operations and amount of equipment are required. Storage costs are comparatively low and in most cases storage is rodent free. …
Dark Cutting Beef - Why?, W. J. Costello
Dark Cutting Beef - Why?, W. J. Costello
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
Many producers have heard of the carcass that did not grade because it "cut dark". What is dark cutting beef and why does it happen?
South Dakota Farm & Home Research: 84th Annual Report (Fall 1971), Agricultural Experiment Station, South Dakota State University
South Dakota Farm & Home Research: 84th Annual Report (Fall 1971), Agricultural Experiment Station, South Dakota State University
South Dakota Farm and Home Research: 1949 -1998
From the Dean and Director [p] 2
Agricultural Engineering [p] 4
Animal Science [p] 9
Bacteriology [p] 14
Botany-Biology [p] 18
Dairy Science [p] 21
Economics [p] 23
Entomology-Zoology [p] 26
Home Economics [p] 30
Horticulture-Forestry [p] 33
Plant Science [p] 35
Rural Sociology [p] 40
Station Biochemistry [p] 42
Veterinary Science [p] 44
Wildlife and Fisheries Science [p] 46
Publications [p] 52
Financial Statement [p] 60
Staff Members [p] 61
Agricultural Advisory Groups [p] 63
Drought-Damaged Corn Silage For Growing Beef Calves, Richard M. Luther, Jacob Fredrikson
Drought-Damaged Corn Silage For Growing Beef Calves, Richard M. Luther, Jacob Fredrikson
South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1971
One hundred thirty-six steer calves averaging 440 lb. were used in a 56-day trial to study the value of supplementing drought-damaged corn silage with protein and energy. The silage contained only about 8 bushels of grain per acre and was harvested in mid-August at 30% dry matter. It was stored in a 71-ton stack, covered with a plastic cover and sealed with earth around the bottom. The stack was opened with a plastic cover and sealed with earth around the bottom. The nitrogen (dry basis) were 11.7 and 0.24 at ensiling. The four treatments (34 steers each) were 1 or …
Effects Of Dietary Selenium Supplements On The Selenium Content Of Eggs And Tissues, R. L. Arnold, O. E. Olson, C. W. Carlson
Effects Of Dietary Selenium Supplements On The Selenium Content Of Eggs And Tissues, R. L. Arnold, O. E. Olson, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
Over the past several years we have conducted experiments to determine the effects of adding selenium to chicken diets. The purpose of this paper is to report effects of selenium supplements on tissue and egg deposition. Selenium is not adequate in the feeds grown in certain areas so currently the Food and Drug Administration is being asked to approve the addition of selenium to pre pared feeds. As with any new additive there must be sufficient proof that there are no harmful effects before the Food and Drug Administration can grant per mission to add selenium to feeds.
Amino Acid Supplementation Of Low Protein Layer Diets, H. Choudhury, C. W. Carlson
Amino Acid Supplementation Of Low Protein Layer Diets, H. Choudhury, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
Previous studies at this experiment station have shown that a typical corn-soy diet diluted with glucose to 9.4% protein and supplemented with 0.19% lysine, 0.25% DL-methionine and 0.04% tryptophane could support about 60% hen-day egg production over a 9-month period. An approach was therefore made to determine which amino acids besides methionine, lysine and tryptophane are further limiting production in this low protein diet.
Dietary Protein And Copper Levels And Its Effect On Fat Composition Of Turkeys, R. A. Nelson, E. Guenther, C. W. Carlson
Dietary Protein And Copper Levels And Its Effect On Fat Composition Of Turkeys, R. A. Nelson, E. Guenther, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
Recent studies at many experiment stations have caused people to become concerned about the type of fat in their diets. Experiments tend to show that highly saturated fats are more cholesterol forming and therefore, a major cause of heart attacks in this county. Previous work at this station has indicated that diet has a great effect on the type of body fat in birds.
Cage Density And Hen Laying Performance, C. W. Carlson, C. E. Holmquist, P. E. Plumart
Cage Density And Hen Laying Performance, C. W. Carlson, C. E. Holmquist, P. E. Plumart
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
What is the optimum density for laying type hens in cages? Over 10 years ago we noted that two hens in an 8-inch cage laid as well as one per cage, and that feed efficiency was superior. Commercial practice of a few years ago was to provide four inches of cage width per bird, thus placing two birds in an 8- inch cage, three in 12 inches, four in 16 inches, etc. Then some poultrymen began using a 3-inch density figure with apparent success. A study was recently completed at this laboratory using 16-inch cages with bird densities of 3, …
Some Effects Of Copper And High And Low Protein Diets On Aortic Rupture And Growth Of Turkets, E. Guenther, C. W. Carlson
Some Effects Of Copper And High And Low Protein Diets On Aortic Rupture And Growth Of Turkets, E. Guenther, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
In other studies using high and low protein diets for growing turkeys, aortic ruptures frequently caused high death losses, particularly among the large type males. Inadequate elastin formation and the resulting lack of strength and elastic ity may be contributing factors in aortic failures. The aortic rupture usually occurs in the lower portion of the artery located between the kidneys. Copper and lysine are both involved in elastin synthesis.
The Use Of Iodine And Chlormadinone Acetate To Suppress Sexual Maturity In Chickens, C. E. Holmquist, C. W. Carlson
The Use Of Iodine And Chlormadinone Acetate To Suppress Sexual Maturity In Chickens, C. E. Holmquist, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
Previous research reports have shown that a delay in sexual maturity of egg-type pullets was beneficial as measured by improved egg size, improved total egg production or less mortality during the production cycle.
Poultry Disease Problems In South Dakota, Thomas E. Lucas D.V.M.
Poultry Disease Problems In South Dakota, Thomas E. Lucas D.V.M.
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
This report details various diseases affecting South Dakota poultry.
Third Annual Poultry Field Day, Animal Science Department
Third Annual Poultry Field Day, Animal Science Department
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
These are the complete proceedings of the third annual Poultry Field Day held on September 30th, 1971 at South Dakota State University.
The Cost Of Producing Eggs, Phillip E. Plumart, Boyd J. Banzer
The Cost Of Producing Eggs, Phillip E. Plumart, Boyd J. Banzer
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
A computerized flock record keeping system has been developed at South Dakota State University. A report is computed monthly from data received from about 60 flockowners. The report is published so that cooperators and others may improve their own efficiency by comparing and evaluating their production costs and flock performance with other flocks on the report.
Can South Dakota Poultrymen Stay In Egg Production?, Boyd J. Bonzer
Can South Dakota Poultrymen Stay In Egg Production?, Boyd J. Bonzer
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
The answer is "Yes some South Dakota poultrymen can stay in egg production". First we should define the word poultrymen and I would like to break them into three groups by size of unit—small, medium, and large flockowners.
Effects Of Various Factors On The Rachitogenic Activity Of Isolated Soy Protein, D. J. Arshem, C. W. Carlson
Effects Of Various Factors On The Rachitogenic Activity Of Isolated Soy Protein, D. J. Arshem, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
The nature of the rachitogenic activity of isolated soy protein was investigated in fifteen studies. An isolated soybean protein-glucose purified diet was fed to day-old turkey poults housed in stainless steel batteries. Feed and water were provided ad libitum.
Raising Broiler-Type Chickens From Two Weeks To Ten Weeks Of Age In Small Lots, B. J. Bonzer, C. W. Carlson
Raising Broiler-Type Chickens From Two Weeks To Ten Weeks Of Age In Small Lots, B. J. Bonzer, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
This report provides instructions and guidelines for the raising of broiler-type chickens.
Flock Record Summary, Phillip E. Plumart
Flock Record Summary, Phillip E. Plumart
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
A computerized flock record keeping system has been developed at State University. A report is computed and published monthly from data received from about 60 flockowners. The records of those flocks completing their laying cycle during the calendar years of 1968, 1969, and 1970 and through June of 1971 are summarized in Table 1.
Mercury In Our Environment, R. J. Emerick, R. F. Gygi, C. W. Carlson
Mercury In Our Environment, R. J. Emerick, R. F. Gygi, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
A project was initiated July 1, 1971, involving the Station Biochemistry and Animal Science departments, to study mercury from the standpoint of (1) methods for mercury determination in natural materials, (2) a survey of the occurrence of mercury in nature in South Dakota and (3) the toxicity of different chemical forms of mercury especially with respect to animal reproduction and teratogenic effects.
Research Projects For Next Years, C. W. Carlson
Research Projects For Next Years, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
The research projects underway at the Poultry Research Unit are scheduled for several year's duration. Therefore, studies in the areas covered by this report for the most part will be continued. Some areas will be phased out, others will receive new emphasis and new projects will be started.
Preotein-Energy Levels And Least Laying Diets, E. Guenther, D. Arshem, C. W. Carlson
Preotein-Energy Levels And Least Laying Diets, E. Guenther, D. Arshem, C. W. Carlson
South Dakota Poultry Field Day Proceedings and Research Reports, 1971
Hens eat to satisfy their energy requirements and for this reason a pro per balance between protein and energy is necessary to achieve optimum use of feed. These concepts, applied to practical feed formulation, have tended to promote high density, high efficiency diets. A study just completed involving protein-energy relationships and least costing techniques indicate that the most efficient feed conversion is not always the most economical method of production.