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Iowa State University

Life Sciences

Animal Science

Iowa State Research Farm Progress Reports

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Growth Performance And Ultrasonic Scan Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa (Trials 3 And 4), P. Matthew Swantek, David R. Stender, John W. Mabry, Mark S. Honeyman, Wayne B. Roush Jan 2014

Growth Performance And Ultrasonic Scan Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa (Trials 3 And 4), P. Matthew Swantek, David R. Stender, John W. Mabry, Mark S. Honeyman, Wayne B. Roush

Iowa State Research Farm Progress Reports

A certified Berkshire program continues to lead niche pork production markets based on its meat quality advantage over commodity-based pork. This economic advantage is especially valuable for smaller, more traditional pork producers. The disadvantages of Berkshire pigs are fatter carcasses, slower gains, and less efficient feed conversion compared with commodity pork production. Consequently, these pigs are often a better fit for less intensive or lower production systems.


Comparison Of Ivermectin And Extended-Release Eprinomectin Deworming Treatment On Stocker And Subsequent Feedlot Performance And Carcass Characteristics Of Fall-Born Angus Heifers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson Jan 2014

Comparison Of Ivermectin And Extended-Release Eprinomectin Deworming Treatment On Stocker And Subsequent Feedlot Performance And Carcass Characteristics Of Fall-Born Angus Heifers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson

Iowa State Research Farm Progress Reports

Severe parasite infections in beef cattle are sometimes associated with decreased growth and performance and clinical disease. Stocker cattle are exposed to many parasites and appropriate deworming strategies can help to minimize parasite burdens when cattle are on grass. Feedlot cattle are often dewormed at arrival and have minimal exposure to additional parasites once placed in the feedlot. The purpose of this study was to evaluate stocker and feedlot performance and carcass characteristics relative to treatment with deworming agents of varying durations of activity.


Utilization Of Pelleted Corn Stover/Ddg Feed As Primary Source Of Roughage And Protein In Beef Feedlot Rations, Christopher A. Clark, Patrick J. Gunn, Dallas L. Maxwell Jan 2014

Utilization Of Pelleted Corn Stover/Ddg Feed As Primary Source Of Roughage And Protein In Beef Feedlot Rations, Christopher A. Clark, Patrick J. Gunn, Dallas L. Maxwell

Iowa State Research Farm Progress Reports

High feed prices and abundant corn stalk residue have created growing interest in the utilization of corn stalk residue or corn stover as a component of beef feedlot rations.


Isu Angus Cow 98398: A Model Of Longevity, Kevin Maher, Alysta D. Markey, Mark S. Honeyman Jan 2014

Isu Angus Cow 98398: A Model Of Longevity, Kevin Maher, Alysta D. Markey, Mark S. Honeyman

Iowa State Research Farm Progress Reports

ISU purebred Angus cow 98398 is a story of longevity and productivity. As the oldest cow in the ISU McNay herd, she is 16 years old, born April 19, 1998 at the former ISU Rhodes Farm, Rhodes, Iowa, Marshall County. She had her first calf in 2001 and has calved every year since, including twins in 2006 and 2008. She and the rest of the ISU research Angus beef herd moved to the ISU McNay Research Farm, Chariton, Iowa, in 2004. She is due with her 16th calf this fall (a heifer), which will make 16 calves in 14 years ...


The Effects Of Bedding Pack Clean-Out In Hoop Barns For Feedlot Cattle, Mark S. Honeyman, W. Darrell Busby, Shawn C. Shouse, Dallas L. Maxwell Jan 2013

The Effects Of Bedding Pack Clean-Out In Hoop Barns For Feedlot Cattle, Mark S. Honeyman, W. Darrell Busby, Shawn C. Shouse, Dallas L. Maxwell

Iowa State Research Farm Progress Reports

Bedded hoop barns have become popular for feeding beef cattle. The cattle are kept in the hoop barn, which is bedded to form a manure pack. ISU work has shown that the cattle perform well. However, producers question how to manage the pack and when to clean out.

The objective of this study was to compare three clean-out strategies (none, once, and twice) for beef cattle fed in hoop barns.


The Isu Compost Facility After Four Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman Jan 2013

The Isu Compost Facility After Four Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman

Iowa State Research Farm Progress Reports

The University Compost Facility has completed four full years of operation. The facility is managed by the ISU Research Farms and has a separate revolving account that receives fees and sales and pays expenses. The facility is designed to be self-supporting, i.e. not receive allocations for its operations. The facility is located at 52274 260th Street, Ames, Iowa.


Grass-Finished Beef Pilot Project: Cattle Performance, Peter J. Lammers, Suzanne T. Millman, Reneé Dewell, Jessica R. Juarez, Michelle L. Christianson, Dallas L. Maxwell, Mark S. Honeyman Jan 2013

Grass-Finished Beef Pilot Project: Cattle Performance, Peter J. Lammers, Suzanne T. Millman, Reneé Dewell, Jessica R. Juarez, Michelle L. Christianson, Dallas L. Maxwell, Mark S. Honeyman

Iowa State Research Farm Progress Reports

Consumer interest in the potential benefits of grass-finished beef is high, but adoption of this approach to cattle feeding has been limited in Iowa. Although some producers successfully meet this niche market demand, consistently producing a high-value carcass from forage-fed cattle is challenging. Intramuscular fat or marbling is a major factor in quality grading of beef. Marbling is heavily influenced by cattle genetics and energy concentration of the diet. Finishing cattle on grain is a proven approach to consistently produce a high-value carcass for the commodity beef market. Researchers at Iowa State University have pioneered the use of ultrasound measurements ...


Yields Of Corn, Soybeans, And Alfalfa In Western Iowa: 1990 To 2011, Mark S. Honeyman, Wayne B. Roush Jan 2012

Yields Of Corn, Soybeans, And Alfalfa In Western Iowa: 1990 To 2011, Mark S. Honeyman, Wayne B. Roush

Iowa State Research Farm Progress Reports

The ISU Western Research Farm, Castana, Iowa is one of the oldest in Iowa dating to 1946. It also has a unique location in the loess hills of western Iowa. The research farm was set up to study the deep loess soils, particularly crop production and soil conservation methods. Although the work at the research farm has transitioned away from traditional plot work, yields of major crops grown at the farm, and climate data are collected each year. Crop yields are a reflection of current technologies and weather. In western Iowa, rainfall is especially critical and is often the limiting ...


Whole Genome Analysis Of Pinkeye Scores In Angus Cattle, Kadir Kizilkaya, Richard G. Tait Jr., Dorian J. Garrick, Rohan L. Fernando, James M. Reecy Jan 2012

Whole Genome Analysis Of Pinkeye Scores In Angus Cattle, Kadir Kizilkaya, Richard G. Tait Jr., Dorian J. Garrick, Rohan L. Fernando, James M. Reecy

Iowa State Research Farm Progress Reports

Infectious Bovine Keratoconjunctivitis (IBK), known as pinkeye, is a common infectious disease affecting the eyes of cattle. It is characterized by excessive tearing, inflammation of the conjunctiva, and ulceration of the cornea. Although pinkeye is non-fatal, it has a marked economic impact on the cattle industry, due to the decreased performance of infected individuals. Genetic effects on the susceptibility of IBK have been studied and Hereford, Jersey, and Holstein breeds were found to be more susceptible to IBK than Bos Indicus breeds. The objectives of our study were: 1) to estimate genetic parameters of IBK scored in different categories by ...


Effects Of Bedding On Pig Performance, Mark S. Honeyman, John F. Patience Jan 2012

Effects Of Bedding On Pig Performance, Mark S. Honeyman, John F. Patience

Iowa State Research Farm Progress Reports

More pigs are being produced in bedded systems such as hoop barns due to the increase in demand for niche pork. Most of the current swine nutrition information has been generated in confinement settings without bedding. As omnivores, pigs ingest some bedding. There are questions about the effects of the ingested bedding on growth and feed utilization by the modern market pig. More knowledge in this area will allow for more accurate feed formulation in bedded systems.


The University Compost Facility After Three Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman Jan 2012

The University Compost Facility After Three Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman

Iowa State Research Farm Progress Reports

The University Compost Facility, 52274 260th St., Ames, Iowa has completed three full years of operation. The facility is managed by the ISU Research Farms and has a separate revolving account that receives fees and sales, and pays expenses. The facility is designed to be self-supporting, i.e. not receive allocations for its operations. The facility consists of seven, 80 × 140 ft hoop barns and a new 55 × 120 ft hoop barn, all with paved floors. The facility also has a Mettler-Toledo electronic scale with a 10 ft × 70 ft platform to weigh all materials. Key machinery is 1 ...


Converting Land From Poplar Tree Bioenergy Planting To Cropland: An Example, Kent R. Berns, Mark S. Honeyman, Richard B. Hall Jan 2012

Converting Land From Poplar Tree Bioenergy Planting To Cropland: An Example, Kent R. Berns, Mark S. Honeyman, Richard B. Hall

Iowa State Research Farm Progress Reports

Many landowners ask about the process and costs for returning land to crop production after trees are cut for biomass. A field on the Squaw Creek bottom, Story County, Iowa was planted to hybrid poplar trees in spring 2000. The trees were planted in rows with a 10-ft spacing. The trees were cut in spring 2010. The resulting field was four acres, and this is the account of the first corn crop in 2011 on the area.


Developing Berkshire Market Pig Growth Curves, Peter J. Lammers, John W. Mabry, Mark S. Honeyman, P. Matthew Swantek, Wayne B. Roush Jan 2012

Developing Berkshire Market Pig Growth Curves, Peter J. Lammers, John W. Mabry, Mark S. Honeyman, P. Matthew Swantek, Wayne B. Roush

Iowa State Research Farm Progress Reports

Several factors have stimulated interest in an old, rather minor swine breed, Berkshire pigs. Berkshires produce pork that is darker, with more intramuscular fat than most swine breeds and lines currently. As the majority of modern pigs were genetically selected to be leaner, the Berkshire breed has continued to produce more flavorful pork. Asian consumers, especially Japanese, prefer and will pay a premium for Berkshire pork. American chefs and discriminating consumers request Berkshire pork, a strong market demand that has caused a flourish in the pork niche market largely centered around pork from Berkshirebred pigs. Some Iowa pork producers are ...


Characterizing Overall Response To Two-Shot Vaccination For Bvdv Type 2 In Angus Weanling Calves, Richard G. Tait Jr., Erika Diane Downey, Mary Sue Mayes, Julia Ridpath, Dorian J. Garrick, James M. Reecy Jan 2012

Characterizing Overall Response To Two-Shot Vaccination For Bvdv Type 2 In Angus Weanling Calves, Richard G. Tait Jr., Erika Diane Downey, Mary Sue Mayes, Julia Ridpath, Dorian J. Garrick, James M. Reecy

Iowa State Research Farm Progress Reports

Vaccination is a management strategy utilized to help reduce prevalence of bovine respiratory disease in feedlots. However, not all animals respond similarly to vaccinations. It is believed that an animal’s genetics control part of the ability to respond to a vaccination protocol. In order to evaluate the genetic control of a new trait such as response to vaccination, it is important to understand the non-genetic factors that affect an animal’s response to vaccination. The objective of this study was to characterize the non-genetic factors affecting overall response to a two-shot vaccination for bovine viral diarrhea virus type 2 ...


Iowa Hoop Structures Used For Confined Beef Cattle Feeding: A Survey, Mark S. Honeyman, Jay D. Harmon Jan 2011

Iowa Hoop Structures Used For Confined Beef Cattle Feeding: A Survey, Mark S. Honeyman, Jay D. Harmon

Iowa State Research Farm Progress Reports

Beginning in the mid-1990s, hoop structures became available to Iowa farmers as an alternative housing system for livestock, primarily swine. Iowa State University was very active in research and demonstrations of hoop barns for swine. ISU also built hoop barns for calving at the ISU Rhodes Research Farm, Rhodes, IA in about 2000. From this work, in 2004/05 ISU built one of the first hoop barns for cattle feeding at the ISU Armstrong Research Farm, Lewis, IA. Frequently, questions are asked about the acceptance of hoop barns for beef cattle and how many beef cattle hoop barns are in ...


Effects Of Calf Age And Dam Age On Circulating Bvdv Ii Antibody Levels Prior To Vaccination In Angus Weanling Calves, Erika Diane Downey, Richard G. Tait Jr., Mary Sue Mayes, Dorian J. Garrick, Julia Ridpath, James M. Reecy Jan 2011

Effects Of Calf Age And Dam Age On Circulating Bvdv Ii Antibody Levels Prior To Vaccination In Angus Weanling Calves, Erika Diane Downey, Richard G. Tait Jr., Mary Sue Mayes, Dorian J. Garrick, Julia Ridpath, James M. Reecy

Iowa State Research Farm Progress Reports

Newborn calves passively acquire antibodies from their dams via consumption of colostrum immediately after birth. Colostrum quality and quantity may differ by dam age affecting the amount of circulating maternally derived antibodies. The objective of this study was to evaluate if there are differences in calf titers of maternal antibodies based on age of dam and age of calf. This knowledge is important for determining vaccination strategies because passively acquired antibodies for bovine viral diarrhea virus I and II (BVDV) have been shown to block the ability of calves to develop their own specific immune response to BVDV.


Correlations Between Carcass Traits And Mineral Concentrations In Angus Beef Raised In Iowa, Richard G. Tait Jr., Qing Duan, Qi Liu, Mary Sue Mayes, Donald C. Beitz, James M. Reecy Jan 2011

Correlations Between Carcass Traits And Mineral Concentrations In Angus Beef Raised In Iowa, Richard G. Tait Jr., Qing Duan, Qi Liu, Mary Sue Mayes, Donald C. Beitz, James M. Reecy

Iowa State Research Farm Progress Reports

Beef is a nutritious food that is known to have high bioavailability for several minerals such as iron and zinc. Although beef is typically high in these nutrients, there is much animalto-animal variation in mineral contents. The objective of this study is to report the relationship between traditional carcass traits and mineral concentrations within the longissimus dorsi.


Incidence Of Bovine Enterovirus, Coronavirus, And Group A Rotavirus, And Concentration Of Total Coliforms In Midwestern Pasture Streams (Three-Year Progress Report), Douglas Allen Bear, James R. Russell, Yong.-Il. Cho, Steven M. Ensley, Kyoung-Jin Yoon Jan 2010

Incidence Of Bovine Enterovirus, Coronavirus, And Group A Rotavirus, And Concentration Of Total Coliforms In Midwestern Pasture Streams (Three-Year Progress Report), Douglas Allen Bear, James R. Russell, Yong.-Il. Cho, Steven M. Ensley, Kyoung-Jin Yoon

Iowa State Research Farm Progress Reports

Grazing management practices that allow cattle to congregate near pasture streams may result in the loss of vegetative cover, soil compaction, and accumulation of manure near the streams. These conditions may cause sediment, phosphorus, and pathogen loading of streams by direct deposition of feces or in precipitation runoff.


Cattle Temporal And Spatial Distribution In Midwestern Pastures Using Global Positioning (Three-Year Progress Report), Douglas A. Bear, James R. Russell, Daniel G. Morrical Jan 2010

Cattle Temporal And Spatial Distribution In Midwestern Pastures Using Global Positioning (Three-Year Progress Report), Douglas A. Bear, James R. Russell, Daniel G. Morrical

Iowa State Research Farm Progress Reports

Previous research has shown that grazing cattle tend to congregate in streamside zones of pastures to obtain water and shade for thermoregulation. However, problems associated with thermoregulation may be increased because of the presence of endophyte-infected tall fescue in pastures. Defining relationships between cattle distribution, such pasture characteristics as size, shape, shade distribution, botanical composition, and climatic factors related to heat stress, will provide the basis for the development and implementation of management practices that minimize nonpoint source pollution possibly associated with grazing cattle.


Supplemental Feeding Of Mixed Co-Products To Grazing Heifers, Daniel D. Loy, Ashley Thompson, Daryl R. Strohbehn, Joe Sellers, Kevin Maher, Dennis R. Maxwell, Sam Ruble Jan 2010

Supplemental Feeding Of Mixed Co-Products To Grazing Heifers, Daniel D. Loy, Ashley Thompson, Daryl R. Strohbehn, Joe Sellers, Kevin Maher, Dennis R. Maxwell, Sam Ruble

Iowa State Research Farm Progress Reports

The growth of the ethanol industry in the Midwest has greatly increased in the last 5 years. This increase has affected the cattle industry in many ways. The increased demand for corn by this industry has driven prices to new highs over the last 3 years. This has affected feed costs for the cattle industry. On the other hand, the growth of the ethanol industry has increased the amount of byproducts that are produced.


Effects Of Stocking Rate, Botanical Composition, And Stream Bank Erosion On The Physical Characteristics Of The Streamside Zones Of Pastures (Three-Year Progress Report), Douglas Allen Bear, James R. Russell, Daniel G. Morrical, Mustafa Tufekcioglu, Thomas M. Isenhart, John L. Kovar Jan 2010

Effects Of Stocking Rate, Botanical Composition, And Stream Bank Erosion On The Physical Characteristics Of The Streamside Zones Of Pastures (Three-Year Progress Report), Douglas Allen Bear, James R. Russell, Daniel G. Morrical, Mustafa Tufekcioglu, Thomas M. Isenhart, John L. Kovar

Iowa State Research Farm Progress Reports

Grazing management practices that allow cattle to congregate near pasture streams may result in the loss of vegetative cover and promote accumulation of manure near the streams, increasing the risk of nonpoint source pollution of the stream


Effectiveness Of Mixing Wet Distillers Grains And Hay With A Mixer Wagon Or A Front End Loader For Long-Term Storage, Daniel D. Loy, Daryl R. Strohbehn, Daniel G. Morrical, Joe Sellers Jan 2009

Effectiveness Of Mixing Wet Distillers Grains And Hay With A Mixer Wagon Or A Front End Loader For Long-Term Storage, Daniel D. Loy, Daryl R. Strohbehn, Daniel G. Morrical, Joe Sellers

Iowa State Research Farm Progress Reports

Storage of wet distillers grains is a major challenge for small beef producers. Many storage methods often require specialized equipment. This study evaluated the differences in variation when wet distillers grains and ground hay were mixed using a mixer wagon or end loader.


Determination Of Carcass And Live Body Weight Of Finishing Cattle From Front Body Weights Taken At A Scale—Electronic Identification Equipped Water Fountain, Garland R. Dahlke, Daryl R. Strohbehn, Darrell Busby, Dallas L. Maxwell Jan 2009

Determination Of Carcass And Live Body Weight Of Finishing Cattle From Front Body Weights Taken At A Scale—Electronic Identification Equipped Water Fountain, Garland R. Dahlke, Daryl R. Strohbehn, Darrell Busby, Dallas L. Maxwell

Iowa State Research Farm Progress Reports

A water fountain oriented cattle weight monitoring system was designed to automatically identify cattle and weigh cattle when they approached the in-pen water fountain to drink. This system provides a labor free means to monitor cattle in terms of daily weight gain and also provides an objective method to evaluate the health of cattle based on frequency of drinking and deviations from their normal pattern.


Beef Cattle Feeding In A Bedded Hoop Barn: Three Year Summary, Mark S. Honeyman, Anna K. Butters-Johnson, Jay D. Harmon, Dallas L. Maxwell, Darrell Busby, Shawn C. Shouse Jan 2009

Beef Cattle Feeding In A Bedded Hoop Barn: Three Year Summary, Mark S. Honeyman, Anna K. Butters-Johnson, Jay D. Harmon, Dallas L. Maxwell, Darrell Busby, Shawn C. Shouse

Iowa State Research Farm Progress Reports

Iowa’s beef cattle industry is comprehensively evaluating the environmental management of feedlots. As the Iowa cattle feeding industry focuses on environmental management, there has been increasing interest in systems where runoff is minimized, such as a bedded hoop barn. A three-year study evaluating the performance of yearling steers in a bedded hoop barn was conducted.


Maximizing Ddgs For Finishing Pigs In Bedded Hoop Barns: Trial One, Mark S. Honeyman, David R. Stender, Wayne B. Roush, Don Hummel Jan 2009

Maximizing Ddgs For Finishing Pigs In Bedded Hoop Barns: Trial One, Mark S. Honeyman, David R. Stender, Wayne B. Roush, Don Hummel

Iowa State Research Farm Progress Reports

Iowa’s ethanol industry continues to expand rapidly. A major coproduct of ethanol production is dried distillers grains with solubles (DDGS). Higher prices for corn and increasing supplies of DDGS have generated questions about feeding DDGS to market swine. The objective of this study was to evaluate various programs to maximize DDGS feeding to finishing pigs in bedded hoop barns. The work reported is the first of several trials planned.


Evaluation Of Mixing Wet Distillers Grains With Ground Hay In A Bunker And Covering Modified Distillers Grains To Extend Storage Life—A Demonstration Project, Daryl R. Strohbehn, Daniel D. Loy, Joe Sellers, Kevin Maher, Dennis R. Maxwell Jan 2009

Evaluation Of Mixing Wet Distillers Grains With Ground Hay In A Bunker And Covering Modified Distillers Grains To Extend Storage Life—A Demonstration Project, Daryl R. Strohbehn, Daniel D. Loy, Joe Sellers, Kevin Maher, Dennis R. Maxwell

Iowa State Research Farm Progress Reports

The ethanol industry is rapidly expanding. As much as 40 percent of the energy cost is associated with drying of the feed co-products. Distillers grains are excellent sources of nutrients for the diets of beef cattle, but have a short shelf life. To expand the use of wet distillers feeds to more producers, longer term, low-cost storage methods are required. Studies done in 2006–2007 showed that bagging these products was an effective management practice, but was higher in cost than acceptable to some producers. Additionally, availability of bagging equipment is limited, thus encouraging other storage methodologies to be investigated.


Use Of Wet Distillers Grains With Solubles Mixed With Ground Hay And Bunker Stored In A Heifer Development Program, Daryl R. Strohbehn, Daniel D. Loy, Joe Sellers, Kevin Maher, Dennis R. Maxwell Jan 2009

Use Of Wet Distillers Grains With Solubles Mixed With Ground Hay And Bunker Stored In A Heifer Development Program, Daryl R. Strohbehn, Daniel D. Loy, Joe Sellers, Kevin Maher, Dennis R. Maxwell

Iowa State Research Farm Progress Reports

Cow-calf producers are asking questions concerning the use of wet distillers grain in their operations. Most small to moderate sized cow-calf producers cannot use a semi-load of wet distillers grain fast enough before it spoils, therefore, methods for extended storage are needed to use this product in their operation. Previous feedlot work suggested distillers grain are excellent sources of nutrients for the diets of feedlot cattle, but have not been used to a large degree in heifer development programs. The goal of this trial was to evaluate the use of modified distillers grain with solubles mixed with ground hay and ...


Pasture Supplementation Of Dakota Brantm Pelleted Distillers Product To Growing Heifers In Southern Iowa, Chris Moore, Daniel D. Loy, Daryl R. Strohbehn, Joe Sellers, Kevin Maher, Dennis R. Maxwell Jan 2009

Pasture Supplementation Of Dakota Brantm Pelleted Distillers Product To Growing Heifers In Southern Iowa, Chris Moore, Daniel D. Loy, Daryl R. Strohbehn, Joe Sellers, Kevin Maher, Dennis R. Maxwell

Iowa State Research Farm Progress Reports

The sustained growth of the ethanol industry in the upper Midwest is well documented. There are many ways this affects the cattle industry. Increased demand for corn by the industry has driven prices to record highs in 2008. The increased cost and demand for corn have forced cattle producers to evaluate the many ways to use the by-products produced by the ethanol industry. Increased ethanol production has led to larger supplies of the byproduct dried distillers grains with solubles (DDGS). Companies have started to market pelleted versions of this product that may be economical for cattle producers to use to ...


Cattle Temporal And Spatial Distribution In Midwestern Pastures Using Global Positioning (A Progress Report), Douglas Allen Bear, James R. Russell Jan 2009

Cattle Temporal And Spatial Distribution In Midwestern Pastures Using Global Positioning (A Progress Report), Douglas Allen Bear, James R. Russell

Iowa State Research Farm Progress Reports

Previous research has shown that grazing cattle tend to congregate in riparian zones of pastures to obtain water and shade for thermoregulation. However, problems associated with thermoregulation may be increased because of the presence of endophyte-infected tall fescue in pastures. Defining relationships between cattle distribution, such pasture characteristics as size, shape, shade distribution, botanical composition, and climatic factors related to heat stress, will provide the basis for development and implementation of management practices that minimize nonpoint source pollution possibly associated with grazing cattle.


Modifying An Outdoor Farrowing Hut For Alternative Indoor Farrowing During Summer And Winter, Mark S. Honeyman, Lyle T. Rossiter Jan 2009

Modifying An Outdoor Farrowing Hut For Alternative Indoor Farrowing During Summer And Winter, Mark S. Honeyman, Lyle T. Rossiter

Iowa State Research Farm Progress Reports

Niche pork markets have expanded rapidly. In the Midwest, frequently there are shortages of pigs born in the winter and summer and surpluses of pigs born in spring and fall. Most producers can meet the niche market requirements by farrowing outdoors in spring and fall. But farrowing outdoors in Midwest winters is difficult. Winter-farrowed sows will also farrow in the hot summer months, another challenging time due to heat and humidity. Therefore, the objective of this project was to modify an outdoor farrowing hut for winter and summer farrowing indoors to meet niche pork market requirements.