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California Polytechnic State University, San Luis Obispo

Dairy Science

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The Effects Of Implementing Cow Cooling For Oostdam Dairy: Benefits From Milk Production, Feed Intake, And Reproduction, Mark Oostdam Mar 2014

The Effects Of Implementing Cow Cooling For Oostdam Dairy: Benefits From Milk Production, Feed Intake, And Reproduction, Mark Oostdam

Dairy Science

Heat stress has a major effect on management decisions for a dairy operation because of the decrease in the cows productivity. Dairy cattle loose efficiency of economic production due to lower milk yields and decreased pregnancy rates. Milk loss due to heat stressed cows in California averages a loss of 293 kg of milk/cow/year(St.-Pierre et al., 2003), and with milk prices reaching record highs, dairies are losing out on increased revenue opportunity. Increases in reproductive infertility from heat stress also affect revenue for a dairy operation by reducing conception rates (Hansen 1997) and pregnancy rates, which ...


Development Of Applied Standard Operating Procedures And Monitoring Practices, Nick Southfield Mar 2014

Development Of Applied Standard Operating Procedures And Monitoring Practices, Nick Southfield

Dairy Science

Development of a standard operating procedure program for Southfield Dairy was chosen in order to improve the work environment and animal health with an underlying goal to improve profitability. Critical control points for the milk barns, maternity barn and calf barn on the dairy, were identified as being critical to the production of quality milk, both for sale and calf feed. Data recording implementation through identification of recordable data, equipment purchases, and log sheet production, was done so to increase relevant information available for veterinary services and specialty consultants. Implementation of procedural documents and training programs are discussed to see ...


Effects Of Covering System, Sealing Time, And Packing On Fermentation, Nutritional Quality, And Organic Matter Loss Of Corn Silage In A Drive-Over Pile, Katie Rose Nutcher Mar 2014

Effects Of Covering System, Sealing Time, And Packing On Fermentation, Nutritional Quality, And Organic Matter Loss Of Corn Silage In A Drive-Over Pile, Katie Rose Nutcher

Dairy Science

This project involved an experiment conducted using a 550-ton capacity drive-over pile of whole-plant corn silage. The main effects compared were: packing the final forage surface with a loader or crawler, delay or immediate sealing, and covering with standard plastic or an oxygen barrier film.

Numerous studies have shown that the absence of oxygen in silage stored in a bunker silo or pile is crucial for proper fermentation and to ensure the highest quality silage at feed out. When oxygen is allowed to permeate through the covering material, it leads to visible spoilage. This trial showed that the oxygen barrier ...


Preparing Samples Of Rancid Milk For Milk Judging Contests, Danielle Li Mar 2014

Preparing Samples Of Rancid Milk For Milk Judging Contests, Danielle Li

Dairy Science

Due to the growing concern of raw milk, there is a growing need for other methods of preparing rancid milk for milk judging. The origin of rancidity in milk is due to lipolysis caused the lipase enzyme. However, with pasteurization, the lipase enzyme is inactivated. The purpose of this experiment was to compare the effect of using lipase powder to other current methods of preparing rancid milk, such as utilizing raw milk. Result showed that all treatments caused desired rancidity. The second purpose was to compare the rancidity between Method A, two to three hour incubation at room temperature, and ...


A Recommendation For The California Dairy System Reform Based On A Comparative Study Of Dairy Market Structuring And Pricing Systems Of Seven Leading Dairy Industries In 2014., Meredith Frisius Mar 2014

A Recommendation For The California Dairy System Reform Based On A Comparative Study Of Dairy Market Structuring And Pricing Systems Of Seven Leading Dairy Industries In 2014., Meredith Frisius

Dairy Science

No abstract provided.


Best Management Practices For Raising Dairy Calves From Birth To Weaning, Alexa Cabral Mar 2014

Best Management Practices For Raising Dairy Calves From Birth To Weaning, Alexa Cabral

Dairy Science

There are many different ways to raise calves on dairy farms in the United States. The way calves are raised can depend on the resources, natural environment and operation of the farm. There is no right or wrong way to raise calves. However, the aim of raising calves is to find the best way to raise a healthy calf so that she will become a productive cow. The objective of this literature review was to determine the ideal management practices for raising a healthy calf from birth to weaning. This literature analyzed numerous articles that covered all aspects of calf ...


Setting Up A Safety Program For California Dairies., Shelby Locke Mar 2014

Setting Up A Safety Program For California Dairies., Shelby Locke

Dairy Science

The purpose of this project was to take the best research for dairy safety in California and combine it in everyday terminology that the average dairy producer could understand. In today’s dairy industry, money is tight and decreasing costs is very important. By implementing a safety program that is in compliance with CAL/OSHA’s standards, injuries will decrease, saving the dairy producer money. This paper has highlighted the major topics for a new dairy to start their safety training program. It includes descriptions of the hazards, responsibilities for employers and employees and ways to prevent accidents from occurring ...


The Analysis Of Solar Photovoltaic Power System On A Large Central Valley Dairy Farm, Brogan Rose Fernandes Mar 2014

The Analysis Of Solar Photovoltaic Power System On A Large Central Valley Dairy Farm, Brogan Rose Fernandes

Dairy Science

The objective of this paper was to determine the financial benefits of installing a PV solar system on a dairy farm in California to create a more efficient and profitable business. The data used was based off Fernoak Farms electrical bills from Southern California Edison before and after solar installation. The background knowledge of how PV solar systems work and their design was incorporated, along with the research of the past, present, and future solar markets. The characteristics of energy consumption on an average dairy farm is given to show the amount of electricity needed to keep the dairy facility ...


A Literature Review On Injection-Site Lesions In Dairy Cows And Culling Decisions, Eric B. Parsons Mar 2014

A Literature Review On Injection-Site Lesions In Dairy Cows And Culling Decisions, Eric B. Parsons

Dairy Science

Currently dairy producers face particular problems concerning their culled cows and bulls, these problems must be addressed so dairy producers have the opportunity to improve the quality of beef produced from their cull dairy cows. At the moment, not much is known about culling decisions outside “break-even” numbers and poor cow conditioning. This literature review outlines the strategy behind culling decisions and looks into potential plans to develop progressive body conditioning and quality of meat sent to auction. Currently the dairy industry is not placing much demand into providing the livestock auctions and harvest plants with higher quality meat. This ...


Haccp-Based Program For Central Coast Creamery: A Small-Scale Artisan Cheese Production Facility, Catherine Machado Mar 2014

Haccp-Based Program For Central Coast Creamery: A Small-Scale Artisan Cheese Production Facility, Catherine Machado

Dairy Science

This project was designed to outline a HACCP-based program that could be used for the start-up of Central Coast Creameries personal plan. The goal was to first provide a layout to more easily distinguish the hazards that the plant might face. After doing so the HACCP plan was made to eliminate those hazards both efficiently and successfully.


Effects Of Alternative Protein Milk Replacer Versus All-Milk Protein Milk Replacer On Weight Gain And Grain Intake In Pre-Weaned Dairy Calves, Kayla Sandoval Mar 2014

Effects Of Alternative Protein Milk Replacer Versus All-Milk Protein Milk Replacer On Weight Gain And Grain Intake In Pre-Weaned Dairy Calves, Kayla Sandoval

Dairy Science

The objective of this study was to determine if there was a significant difference in weight gain and grain intake between Holstein calves fed milk replacer with an alternative protein source and an all-milk replacer. The study took place on a large commercial calf operation in the Central Valley of California. All calves on trial were Holstein bull calves and started the trial within three to ten days of birth. Calves on trial were weighed a total of four times. The 236 treatments did not start until the second weight was measured at about 30 days of age and was ...


Improving Cow Comfort To Reduce Health Issues And Increase Milk Yield On Dairy Farms, Shonlyn Ferrari Mar 2014

Improving Cow Comfort To Reduce Health Issues And Increase Milk Yield On Dairy Farms, Shonlyn Ferrari

Dairy Science

In recent years the dairy industry has been looking more and more into cow comfort. This is because there are many benefits to ensuring cows are in some of the best new facilities. I looked into some of the major issues relating to cow comfort which include how to improve your own dairy, what health problems are common with inadequate cow comfort, and how these issues relate back to milk yield. First cow comfort is outlined and explained, then health problems are shown to be caused by improper cow care and lastly how cow comfort can improve milk yield. In ...


The Implications Of Global Warming Upon United States Dairy Herds: Effects On The Economics Of Dairying And Stability Of Herds With Low Genetic Diversity, Lauren Lusby Mar 2014

The Implications Of Global Warming Upon United States Dairy Herds: Effects On The Economics Of Dairying And Stability Of Herds With Low Genetic Diversity, Lauren Lusby

Dairy Science

Global warming (GW) is of real concern for the current U.S. agricultural industry. The agricultural industry has had a hand in emitting into the atmosphere. Severe heat spells seen nationwide and volatile climate shifts have pushed states such as California to implement governmental support to high impact areas due to dwindling water sources. Motivated dairy industry members have created plans to reduce dairy GHE contribution. Some research has suggested a benefit in GHG emissions from fewer cow-higher production approaches to dairy farmers. Most U.S. dairy cattle are specialized due to high inbreeding values created by selecting for few ...


A Review Of Mastitis Control Practices, Rebecca Gooder Feb 2014

A Review Of Mastitis Control Practices, Rebecca Gooder

Dairy Science

No abstract provided.


Reproductive Analysis Of 100% Delayed 1st Service Ovsynch Breeding During Summer Months At A Large Central Valley Dairy, Micah John Degroot Mar 2013

Reproductive Analysis Of 100% Delayed 1st Service Ovsynch Breeding During Summer Months At A Large Central Valley Dairy, Micah John Degroot

Dairy Science

As the Dairy industry evolves year by year it is becoming ever more important to be reproductively efficient. The implementation of various timed artificial insemination (TAI) programs has become very common in order to maintain reproductive stability throughout the herd. This can be harder than ever with the increase of herd sizes and hot summer temperature in the central valley. The objective of this study compares two ovsynch breeding programs during summer months on a large central valley dairy. The change in protocol was a delayed 100% timed artificial insemination at approximately 70 dim for the 5-month period from June ...


Gas Emissions And Olfactometry For Dairy Heifers, Rebecca Gary Mar 2013

Gas Emissions And Olfactometry For Dairy Heifers, Rebecca Gary

Dairy Science

The objective of this study was to determine any trends in odor evaluations and gas emissions of manure samples in heifers fed high/low concentrate and high/low forage diets. Heifers (n = 8) were enrolled randomly in a split plot design with diet type (high concentrate vs. low concentrate) as the whole plot and forage quality (4 different levels of corn stover within each diet type) as sub-plots in a 4-period (21d) 4X4 Latin square design. Total collection of urine and feces was performed on days 18-21 of each period. The feces to urine ratio (F:U) was determined on ...


A Business Model For The Small-Scale, Start-Up, Organic Jersey Dairy, Jim Moreda Mar 2013

A Business Model For The Small-Scale, Start-Up, Organic Jersey Dairy, Jim Moreda

Dairy Science

To determine the financial feasibility and stability of starting a small-scale organic jersey dairy in Northern California, given the changes and restrictions that must take place in all aspects of production while operating organically. Using a unique combination of ownership and borrowing, I have created a business model made to appropriately fit the organic dairy system, addressing every area of the operation whether it be business or animal related. Through experience, reviews, and research of organic techniques allowable to apply, I was able to reveal and identify specific areas of husbandry and financing in which I would need to excel ...


Sire Evaluation For Milking Duration, James Macedo Mar 2013

Sire Evaluation For Milking Duration, James Macedo

Dairy Science

The objective of this study was to utilize electronically recorded data from on-farm milk recording systems and herd management software to determine if a sire has a genetic influence on his daughter’s milking duration. Measurements of milking duration from three dairy facilities were taken between January 27, 2013 and January 31, 2013. These measurements supplied 25,070 observations, corresponding to 9,418 cows and 895 sires. These data were evaluated with a SAS alongside a herd-mate comparison. The statistical analysis demonstrated that a sire does have a genetic influence on the milking duration of his progeny. The Van Beek ...


A Review Of The History And Motivations Of Animal Identification And The Different Methods Of Animal Identification Focusing On Radiofrequency Identification And How It Works For The Development Of A Radiofrequency Identification Based Herd Management System On The Cal Poly Dairy, Manuel Silveira Mar 2013

A Review Of The History And Motivations Of Animal Identification And The Different Methods Of Animal Identification Focusing On Radiofrequency Identification And How It Works For The Development Of A Radiofrequency Identification Based Herd Management System On The Cal Poly Dairy, Manuel Silveira

Dairy Science

My objective for this senior project was to perform an extensive review of literature on the history of animal identification and common motivations for identifying livestock, the different types and methods of identifying animals, with a special focus on radiofrequency identification technology (RFID) and how it works. A secondary objective was creating an instructional booklet for the implementation of a RFID based management system on the Cal Poly dairy. The identification of livestock for management or disease traceability has been a practice in one form or another for centuries (Blancou, 2001). Today, animal identification is of great importance to herd ...


Milking Protocols At The Cal Poly Dairy Farm, Kevin Mohan Mar 2013

Milking Protocols At The Cal Poly Dairy Farm, Kevin Mohan

Dairy Science

Milking parlors are the center of a dairy operation and directly responsible for its profits, yet dairy training is frequently neglected and often lackluster. The Cal Poly dairy farm, despite having a milker pool that is comparatively inexperienced with farm labor has no written manual for training of milkers. This results in a workplace that in the event of an accident or point of confusion leaves workers nowhere to turn to for clarification save contacting a supervisor directly. It also may also result in a lack of established guidelines, and a frequent need for clarification due to misunderstood expectations and ...


Determine If Raising Holstein Steers Can Be Profitable, While Creating A Quality Product, William Dyt Mar 2013

Determine If Raising Holstein Steers Can Be Profitable, While Creating A Quality Product, William Dyt

Dairy Science

Abstract

The objective of this experiment is to determine if holstein steers can be raised for a high quality, profitable beef product. The data collected came from Dyt Dairy and their steer program. Records came from the Souza Family, who does the calf raising for Dyt Dairy, and were compiled into a spread sheet. Daily costs incurred in raising a steer for the first five months were incorporated and analyzed relative to different rates of gain. The second stage analysis involved the next five months on a higher ration at Dyt Dairy #2. Again costs per day and rates of ...


Increasing California Dairy Exports To Japan And South Korea, Kristina Soper Mar 2013

Increasing California Dairy Exports To Japan And South Korea, Kristina Soper

Dairy Science

The opportunities for increasing exports of California dairy products to the Japanese and South Korean markets were determined by identifying current obstacles in the California dairy industry and determining the characteristics of consumers in the Japanese and South Korean markets. As the largest milk-producing state and the supplier of 7.5% of total U.S. dairy exports, California’s economic activity greatly affects the rest of the nation and the world. The trends in the California dairy industry include increasing total milk production and per-cow milk production, a diminishing number of total dairy operations, and a rising number of large ...


A Business Plan For A Custom Dry Cow Transition Facility And A Calf Ranch, Landon Joseph Fernandes Mar 2013

A Business Plan For A Custom Dry Cow Transition Facility And A Calf Ranch, Landon Joseph Fernandes

Dairy Science

In recent economic times the dairy industry has witnessed historic lows in milk price and historic highs in feed prices. As a result many dairies have been forced out of business or have found other ways to diversify in order to offset the accumulated debt from dairying. One possible way a dairy can minimize debt is by sending its transition cows to custom transition cow management facility from dry-off through freshening. This management facility would give optimal care and attention to these cows to ensure metabolic and post calving health issues are minimal and that cows are returned to the ...


Consumer Perception Of Organic Milk, Christina Puetz Mar 2013

Consumer Perception Of Organic Milk, Christina Puetz

Dairy Science

The objective of this study was to determine the potential factors, reasons and beliefs that contribute to college aged consumers’ choice to purchase organic milk. The data were from survey of students using questions that were modeled after consumer issues and concerns over conventional milk as discussed in the literature review. This study was particularly interested in exploring differences between students in agriculture classes and non-agriculture classes. The literature referenced came from a variety of sources, including scientific journals, online articles, milk advisory boards, and governmental agencies. According to the literature review, consumer concerns and reasons for purchase of organic ...


The Effects Of Feeding Brown Midrib Corn Silage Compared To Conventional Corn Silage In High Producing Dairy Cows, Erick Mitchell Mendonca Mar 2013

The Effects Of Feeding Brown Midrib Corn Silage Compared To Conventional Corn Silage In High Producing Dairy Cows, Erick Mitchell Mendonca

Dairy Science

The objective of this study was to determine if supplementing Brown Midrib Corn Silage into a high cow feed ration could improve digestibility in the rumen, add savings into the feed ration, and improve milk production. Beginning in June of 2012 two hundred high producing Holstein cows were selected from Johnny Mendonca & Sons Dairy in Tulare, Ca to estimate the difference between feeding Conventional Corn Silage compared to Brown Midrib Corn Silage. This test trial was conducted over the span of 4 months and was hypothesized by the author. To achieve this, the author conducted three analyses to determine if ...


Detecting Errors In Generating A Certificate Of Analysis, Breanne Harlan Mar 2013

Detecting Errors In Generating A Certificate Of Analysis, Breanne Harlan

Dairy Science

Many companies rely on a Certificate of Analysis (COA) to accompany the delivery of their product or material. The COA, required by law, prevents customers from questioning whether a product is safe and ensures manufacturers confirm every product tested passes the Food and Drug Administration’s required specifications. Previous to this project, Kraft Foods Springfield copied their test results for each product from their data warehouse software, called Systems, Applications, and Products onto a Word document to create a COA. This was a systematic approach to detect the possible occurrences of error and reduce the time spent on generating a ...


Development Of A Training Program For The Cal Poly Creamery, Rachel Souerbry Mar 2013

Development Of A Training Program For The Cal Poly Creamery, Rachel Souerbry

Dairy Science

No abstract provided.


Pasteurization And Freezing Effect On Colostrum Characteristics, Morbidity, Igg Absorption, And Growth Rates Of Holstein Heifer Calves, Rob Diepersloot Mar 2013

Pasteurization And Freezing Effect On Colostrum Characteristics, Morbidity, Igg Absorption, And Growth Rates Of Holstein Heifer Calves, Rob Diepersloot

Dairy Science

The objective of this study was to determine if fresh frozen, pasteurized frozen, or fresh refrigerated colostrum impacted morbidity, growth rates, and the overall serum immunoglobulins (IgGs) in newborn calves. The second objective was to compare the effects that pasteurization and freezing had on colostrum IgG concentration and total bacteria counts compared to raw refrigerated colostrum. A controlled trial was completed on a 6,000-cow dairy in California where colostrum was harvested twice daily, pooled, and then divided into three different treatment groups and processed accordingly. One treatment was pasteurized at 60oC for 60 min and then frozen ...


The Analysis And Comparison Of Organic Dairy Operations And Conventional Dairy Operations In Terms Of Milk Quality, Animal Health, Nutrition, Market Aspects And Economic Benefits, Lianne Michele Nunes Mar 2013

The Analysis And Comparison Of Organic Dairy Operations And Conventional Dairy Operations In Terms Of Milk Quality, Animal Health, Nutrition, Market Aspects And Economic Benefits, Lianne Michele Nunes

Dairy Science

The dairy industry in California has two very vital sectors that make up the production and marketing landscape: Organic and Conventional dairy production systems. The objective of this review of literature is to explore the differences and contrasting views of milk quality, reproduction, animal health, nutrition, market aspects and pricing systems within each industry and determine how each industry has the potential for tremendous success among its producers. It is important to understand the aspects of each industry because of the advantages and disadvantages each industry imposes on different producers located all around the state. Organic production systems have very ...


Generating A Nutritional Dairy Cow Ration Based On Green Waste Out Of San Luis Obispo County, Nicole Mendoza Mar 2013

Generating A Nutritional Dairy Cow Ration Based On Green Waste Out Of San Luis Obispo County, Nicole Mendoza

Dairy Science

The objective of this literature review was to assess the accessibility and utilization of waste like products for inclusion into the dairy ration in San Luis Obispo County. With feed prices continually rising, alternatives to the very expensive feedstuffs should be continually explored. In this review, papers based on grocery store waste, viticulture waste, Cal Poly waste, and crop waste were explored to determine the feasibility of including these products into the dairy ration economically. Aspects evaluated were availability, nutrient composition, storing and handling and a viability of undertaken this system to supplement dairy cattle feeding. As a result it ...