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Feeding Bioenergy Coproducts To Swine: Crude Glycerol, Brian J. Kerr, Mark S. Honeyman, Peter J. Lammers, Sherry Hoyer Dec 2007

Feeding Bioenergy Coproducts To Swine: Crude Glycerol, Brian J. Kerr, Mark S. Honeyman, Peter J. Lammers, Sherry Hoyer

Iowa Pork Industry Center Fact Sheets

Biodiesel can be produced from a variety of fats and oils. Soybean oil is the primary feedstock in Iowa. In general, soybean oil is mixed with an alcohol (usually methanol) and a catalyst. The action of the alcohol and catalyst cause the oil (triacylglyceride) molecules to be broken down into methyl esters (biodiesel) and crude glycerol. Crude glycerol is the principal co-product of biodiesel production. For every gallon of biodiesel produced, 0.7 pounds of crude glycerol are co-generated.

Biodiesel sales in the United States have increased rapidly since 1999 and annual production capacity in the U.S. is nearly ...


A Study Of The Factors That Influence Consumer Attitudes Toward Beef Products Using The Conjoint Market Analysis Tool, Brian E. Mennecke, Anthony M. Townsend, Dermot J. Hayes, Steven M. Lonergan Oct 2007

A Study Of The Factors That Influence Consumer Attitudes Toward Beef Products Using The Conjoint Market Analysis Tool, Brian E. Mennecke, Anthony M. Townsend, Dermot J. Hayes, Steven M. Lonergan

Economics Publications

This study utilizes an analysis technique commonly used in marketing, the conjoint analysis method, to examine the relative utilities of a set of beef steak characteristics considered by a national sample of 1,432 US consumers, as well as additional localized samples representing undergraduate students at a business college and in an animal science department. The analyses indicate that among all respondents, region of origin is by far the most important characteristic; this is followed by animal breed, traceability, animal feed, and beef quality. Alternatively, the cost of cut, farm ownership, the use (or nonuse) of growth promoters, and whether ...


Performance Of Gestating Sows In Bedded Hoop Barns And Confinement Stalls, Peter J. Lammers, Mark S. Honeyman, John W. Mabry, Jay D. Harmon May 2007

Performance Of Gestating Sows In Bedded Hoop Barns And Confinement Stalls, Peter J. Lammers, Mark S. Honeyman, John W. Mabry, Jay D. Harmon

Agricultural and Biosystems Engineering Publications

The effects of gestation housing systems on sow and litter performance were evaluated for 2.5 yr in southwest Iowa. Gestation housing system treatments were as follows: 1) individual gestation stalls in a mechanically ventilated confinement building with a partially slatted floor and a manure flush system and 2) group pens with individual feed stalls in deep-bedded, naturally ventilated hoop barns. In all, 957 litters from 353 sows were evaluated. Number of pigs born alive per litter differed for the 2 housing treatments (P = 0.002). Sows gestated in hoop barns gave birth to more live pigs per litter (10 ...


Ibk (Pinkeye) In Black Angus Cattle, Jose E. Rodriguez, Abebe Hassen, Richard G. Tait Jr., James M. Reecy Jan 2007

Ibk (Pinkeye) In Black Angus Cattle, Jose E. Rodriguez, Abebe Hassen, Richard G. Tait Jr., James M. Reecy

Iowa State Research Farm Progress Reports

Infectious Bovine Keratoconjunctivitis (IBK), commonly known as pinkeye, is a contagious bacterial disease that affects cattle worldwide. IBK is characterized by excessive tearing, inflammation of the conjunctiva, and ulceration of the cornea. In severe cases, perforation of the cornea may occur, leading to permanent blindness. The incidence rates reported in the ISU beef herd range from 30–52% in the last four years(Figure 1). As a result of the economic impact of pinkeye in the cattle industry, estimated at $150 million/year, the lack of effective treatments against the disease and the increased demand for‘organic’ products, research in ...


Nutrient Analysis Of Iowa Grown Field Peas For Swine Feed, Josephat G. Njoka, Mark S. Honeyman, Thomas G. Miller Jan 2007

Nutrient Analysis Of Iowa Grown Field Peas For Swine Feed, Josephat G. Njoka, Mark S. Honeyman, Thomas G. Miller

Iowa State Research Farm Progress Reports

Field peas are a cool season legume crop. Temperate climatic conditions are the most suitable for pea growing. Higher altitudes and cool seasons can provide excellent yields in warmer climates. Most cultivated field peas belong to the same species (Pisum sativum L.), but several subspecies have been developed to meet specific agronomic, pathological, and nutritional needs of different regions. Field peas are relatively high in crude protein 22.8%, intermediate between corn and soybeans. Starch content is slightly less than corn depending on the variety. Peas are often used as protein supplements with monogastric diets in areas where soybean meal ...


Finishing Beef Cattle On Grass With Self-Fed By-Products, Daniel G. Morrical, Mark S. Honeyman, James R. Russell, Daryl R. Strohbehn, Dallas L. Maxwell, Darrell Busby, Joe Sellers Jan 2007

Finishing Beef Cattle On Grass With Self-Fed By-Products, Daniel G. Morrical, Mark S. Honeyman, James R. Russell, Daryl R. Strohbehn, Dallas L. Maxwell, Darrell Busby, Joe Sellers

Iowa State Research Farm Progress Reports

There has been increasing interest by consumers in beef from cattle that are finished or fattened “on grass” rather than in a conventional feedlot. Also recently, Iowa has had a proliferation of plants that produce ethanol from corn. The byproduct of this process is distillers dried grains with solubles (DDGS). The objective of this study was to feed beef cattle to market weight by grazing cool-season grass supplemented with self-fed by-product pellets.


Storage Project Of Wet Distillers Grains, Daniel D. Loy, Daniel G. Morrical, Daryl R. Strohbehn, Joe Sellers Jan 2007

Storage Project Of Wet Distillers Grains, Daniel D. Loy, Daniel G. Morrical, Daryl R. Strohbehn, Joe Sellers

Iowa State Research Farm Progress Reports

On October 18, 2006, one load of wet distillers grains from Pine Lake Corn Processors LLC, Steamboat Rock, IA was delivered to the ISU McNay Research Farm southwest of Chariton, IA via walking-bed semi-truck. The analysis of that product is given in Table 1.


Heritability Estimates For Fatty Acid Concentration In Angus Beef, Richard G. Tait Jr., S. Zhang, Travis J. Knight, Daryl R. Strohbehn, Donald C. Beitz, James M. Reecy Jan 2007

Heritability Estimates For Fatty Acid Concentration In Angus Beef, Richard G. Tait Jr., S. Zhang, Travis J. Knight, Daryl R. Strohbehn, Donald C. Beitz, James M. Reecy

Iowa State Research Farm Progress Reports

Our group has previously reported that percentage of fatty acids within the total fatty acids shows evidence of being under genetic control. In more recent work, we are conducting a comparison of heritability estimates when the fatty acids are expressed as a percentage of the lipid (% fatty acid within the total fatty acids) or expressed as a concentration within the beef (mg fatty acid/g of beef). Expression of fatty acid concentration as mg fatty acid/g of beef is dependent upon both the concentration of lipid in the beef and the concentration of fatty acid within the lipid.


A Project To Produce Calves From Selected Historical Angus Bulls, Mark S. Honeyman, Dennis R. Maxwell, Kevin Maher Jan 2007

A Project To Produce Calves From Selected Historical Angus Bulls, Mark S. Honeyman, Dennis R. Maxwell, Kevin Maher

Iowa State Research Farm Progress Reports

As part of the 50th anniversary of the McNay Research Farm, cows were inseminated with semen from Angus bulls of the 1950s and the 1970/1980s. The goal was to produce calves from Angus bulls that were popular 50 years ago and 25 years ago for viewing at the McNay Research Farm’s 50th Anniversary celebration in September 2006.


Heritability Of Genetic Resistance To Bovine Respiratory Diseases, James M. Reecy, Matthew Schneider Jan 2007

Heritability Of Genetic Resistance To Bovine Respiratory Diseases, James M. Reecy, Matthew Schneider

Iowa State Research Farm Progress Reports

Bovine Respiratory Disease (BRD) is the costliest disease facing the cattle industry. Therefore, the objective of this study was to better understand the genetic component of underlying resistance to bovine respiratory diseases. The focus of this study was to better understand the genetic differences between cattle that were more susceptible and/or more resistant to BRD. Data from Iowa State University’s cattle at the McNay Research Farm have been used to try to determine the best phenotypic measurement with which to identify resistant cattle to ultimately help producers in the selection of this economically relevant trait.


Triticale Fed To Finishing Pigsin Hoop Barns, Zeb Sullivan, Mark S. Honeyman Jan 2007

Triticale Fed To Finishing Pigsin Hoop Barns, Zeb Sullivan, Mark S. Honeyman

Iowa State Research Farm Progress Reports

Triticale is a synthetic small grain made by crossing durum wheat and rye. Triticale has more crude protein and an amino acid profile that more closely matches the needs of the finishing pig than corn. Using triticale as an ingredient in swine diets decreases the amount of soybean meal needed to meet the amino acid needs of the pig, compared to corn-based diets. There have been conflicting results on the effects of feeding triticale to finishing pigs. Some studies reported similar pig performance when triticale replaced corn as the dietary grain source, while others have shown decreased performance. The objective ...


Comparison Of Gain And Carcass Traits From Pasture- And Feedlot-Finished Beef Steers Supplemented With Distillers Grain Co-Products, Roxanne Knock, Allen H. Trenkle, Donald C. Beitz, Elisabeth J. Huff-Lonergan, Steven M. Lonergan, James R. Russell Jan 2007

Comparison Of Gain And Carcass Traits From Pasture- And Feedlot-Finished Beef Steers Supplemented With Distillers Grain Co-Products, Roxanne Knock, Allen H. Trenkle, Donald C. Beitz, Elisabeth J. Huff-Lonergan, Steven M. Lonergan, James R. Russell

Iowa State Research Farm Progress Reports

As the ethanol and renewable fuel industries grow, the availability of distillers grains and other co-products continues to increase. These co-products are valuable feedstuffs for ruminants because of their high protein content and also their high fiber content. However, as more acres are dedicated to corn production, less pasture will be available for grazing livestock and less corn may be available for use as feed. As such,supplementing pasture-fed cattle with distillers grains may be an option for some producers to utilize. Therefore, the objective of this research was to evaluate pasture-finishing steers with supplementation of a distillers co-product.