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Articles 1 - 12 of 12
Full-Text Articles in Dairy Science
A Literature Review On Crossbreeding In Dairy Cattle, Philip Owens
A Literature Review On Crossbreeding In Dairy Cattle, Philip Owens
Dairy Science
The objective of the literature review was to determine whether or not crossbreeding is a profitable and a viable option for the dairymen of today by reviewing the literature and experiments that have been conducted throughout the world by today’s dairy professionals and leaders. The Dairy market today is increasingly competitive and more and more dairymen are considering crossbreeding to decrease health costs and increase profitability. Price premiums from cheese plants are given to milk producers for high components like protein and fat. In recent studies done by universities and research facilities around the world, results have found promising numbers …
Burning Manure As An Economical Energy Source, Ron Machado
Burning Manure As An Economical Energy Source, Ron Machado
Dairy Science
The dairy industry is under pressure from increasing environmental regulations, falling prices, as well as very aggressive foreign competition. Manure management and electrical costs are one area dairymen can look to cut costs. My objective for this project was to determine how cost effective biomass gasification of manure is at generating electricity. The proposed project was designed for a manure production equal to a 3,000 cow herd. I used standard capital budgeting techniques to determine the efficiency of the project, primarily focusing on the net present value, internal rate of return, and payback period.
Institution Of Presynch Protocol, Justin Breedyk
Institution Of Presynch Protocol, Justin Breedyk
Dairy Science
The objective of this study was to compare factors of reproductive efficiency between two separate ovulation synchronization programs, with one that includes presynchronization of all fresh cows and one that does not ovsynch cows until they have been found open after initial insemination. In recent years, reproductive efficiency has declined as other areas of the dairy business have continued to excel. The investigation was performed on two dairies in Hart, Texas, White River Ranch and VB Dairy. The dairies include herds of 5,000 and 3,000 milking cows, respectively. Data was retrieved using Dairy Comp 305 and covered a two month …
A Comparison Between The Dhia Test For Somatic Cell Counts Compared To Porta Side Test On The Individual Quarters Of The High Scc Cows At The Cal Poly Dairy, Melissa Zimmer
Dairy Science
The objective of my senior project is to determine if California Mastitis Test (CMT) and the Porta Side Somatic Cell Count (SCC) Test is equivalent to the DHIA laboratory somatic cell test. The data was taken from the Cal Poly Dairy on October 19th, 2010. Samples were taken from eight Holstein cows during milking time and the tests were run in the barn. These eight cows were the highest somatic cell count cows at the Cal Poly Dairy on the previous test day October 9, 2010. During milking the cows were pre and post dipped before the samples were taken. …
Effectiveness Of A Presynchronization Program Implemented On A Modern Dairy Facility, R. (Robert) E. Thommen
Effectiveness Of A Presynchronization Program Implemented On A Modern Dairy Facility, R. (Robert) E. Thommen
Dairy Science
The objective of this study was to determine the success of a presynchronization program implemented on a modern dairy facility. The study was conducted on a 1,400 cow dairy in the central valley of California. 86 cows were involved in the study during the summer months of June through September. Cows were either assigned in the synchronization program or placed in a control group based on the last digit of their identification. At 43 DIM, presync cows were injected with their first treatment of the synchronization program. Estrous cycles of the presync group were manipulated with treatments of Prostaglandin and …
Cal Poly Embryo Recovery Record System, Kelsey Donahoo-Cheda
Cal Poly Embryo Recovery Record System, Kelsey Donahoo-Cheda
Dairy Science
No abstract provided.
Use Of Endovac-Bovi In Pre-Weaned Calves, Jena Glasgow
Use Of Endovac-Bovi In Pre-Weaned Calves, Jena Glasgow
Dairy Science
No abstract provided.
Genotype And Breed Trend Influences On Citric Acid And Coagulation Times Of Raw Milk, Melissa Looney
Genotype And Breed Trend Influences On Citric Acid And Coagulation Times Of Raw Milk, Melissa Looney
Dairy Science
The objective of the study was to determine if citric acid levels measured in milk was related to genetic variants identified in Holstein and Jersey cows. The data used were milk samples collected from both Holstein and Jersey cows at Cal Poly, San Luis Obispo. Citric acid levels and other constituents were measured using FTIR methods with the FOSS MilkoscanTM FT2 on each sample. Genotypes were obtained for the DGAT 1 locus using polymerase chain reaction and an enzymatic digestion using the MWO I restriction enzyme. Observations were obtained on 13 Holsteins and 12 Jersey cows. Results indicated that citric …
Ultraviolet Light As An Adjunct Treatment To Pasteurization For Microbial Reduction In Milk Intended For Extended Shelf Life, Jacob Zonneveld
Ultraviolet Light As An Adjunct Treatment To Pasteurization For Microbial Reduction In Milk Intended For Extended Shelf Life, Jacob Zonneveld
Dairy Science
The objective of this study was to determine whether ultraviolet light treatment of milk could be used in adjunct with pasteurization and to determine whether the microbial count in bulk tank raw milk was sufficient enough to receive significant results. Samples were collected from a bulk tank filled with 1600 gallons of raw Holstein and Jersey milk from the Cal Poly Dairy throughout the course of a week. Control (library) samples were also taken from the raw milk tank and stored without air or agitation for comparison. These samples were plated each day and examined 24 and 48 hours after …
Cystic Ovaries In Dairy Cattle, Lacey Morgan Rosenberg
Cystic Ovaries In Dairy Cattle, Lacey Morgan Rosenberg
Dairy Science
The objective of this literature review was to determine the potential causes and factors affecting the incidence of ovarian cysts in dairy cattle as well as to examine functionality of various preventative methods and treatments of cysts. The end product was to be a document outlining all the information available on the three different types of cysts that can develop on the bovine ovary, follicular cysts, luteal cysts, and cystic corpora lutea. The literature that was reviewed, most in the forms of research papers, articles, and reviews, came primarily from scientific journals and published books. The literature reviewed was only …
Use Of An Activity Monitoring System As Part Of The Cal Poly Dairy Breeding Protocol, Trevor Nutcher
Use Of An Activity Monitoring System As Part Of The Cal Poly Dairy Breeding Protocol, Trevor Nutcher
Dairy Science
The objective of this study, is to determine the effectiveness of an activity monitoring system as an integral part of the Cal Poly Dairy breeding protocol. Dairy herd reproductive efficiencies have dropped in the past 40 years. Increased milk production, and genetic advancements towards more milk production, have led to reproductive rates declining. An advanced breeding program is needed to become more efficient in this area. The study consisted of the evaluation of one option, Heatime™ by MICRO Dairy Logic, and comparing it to the commonly used programs in dairies today such as synchronization methods, pedometers, and other electronic detection …
Controlling The Mineral Content Of Sweet Whey Powder In An Industrial Setting, Matthew W. Sawyer
Controlling The Mineral Content Of Sweet Whey Powder In An Industrial Setting, Matthew W. Sawyer
Dairy Science
The objective of this project was to reduce the final ash content of sweet whey powder. The data for this project was collected over a two-week period, from July 13th to July 27th 2010 in a dairy plant in the Mid-West of the United States. The data is composed of particle size test, ash test, and pH test. The conclusions of this study are that multiple pre-heat treatment tank changes contribute to mineral content by requiring more buffering than usual. The low pH of this pre-heat liquid forces a need for more buffering. Particle segregation may play a role in …