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Animal Sciences

Iowa State Research Farm Progress Reports

2001

Articles 1 - 19 of 19

Full-Text Articles in Life Sciences

An Analysis Of The Cost Of Producing Pork In Hoop Structures And Confinement During The Summer, Benjamin Larson, James B. Kliebenstein, Mark S. Honeyman, Arlie D. Penner Jan 2001

An Analysis Of The Cost Of Producing Pork In Hoop Structures And Confinement During The Summer, Benjamin Larson, James B. Kliebenstein, Mark S. Honeyman, Arlie D. Penner

Iowa State Research Farm Progress Reports

This research compares pork production in two types of production facilities. Information for the fourth group of pigs, which was fed from June 1999 to October 1999 at the Rhodes Research and Demonstration Farm, is provided. Results will be evaluated using the actual production efficiency numbers and the average or typical costs for feeder pigs, feed, etc., along with average market hog prices. This allows for comparison of expected costs and returns for normal input cost and hog price conditions.


Beef Cattle Breeding Project Progress Report: Growth-Trait Epds For 1998- And 1999-Born Calves, Abebe T. Hassen, Doyle E. Wilson, Gene H. Rouse, Richard G. Tait Jr. Jan 2001

Beef Cattle Breeding Project Progress Report: Growth-Trait Epds For 1998- And 1999-Born Calves, Abebe T. Hassen, Doyle E. Wilson, Gene H. Rouse, Richard G. Tait Jr.

Iowa State Research Farm Progress Reports

The Iowa State University beef cattle breeding project was designed to develop two selection lines of beef cattle for use as a research base to answer questions that influence genetic improvement. The project was started in 1996 and is being conducted at the Rhodes (central Iowa) and McNay (southern Iowa) research and demonstration farms.


Effects Of Corn Crop Residue Grazing On Soil Physical Properties And Subsequent Soybean Production In A Corn-Soybean Crop Rotation (A Progress Report), Justin Clark, James R. Russell, Douglas Karlen, Darrell Busby, L. James Secor, Brian Peterson, Larry Pellack, Carroll Olsen, Shawn C. Shouse Jan 2001

Effects Of Corn Crop Residue Grazing On Soil Physical Properties And Subsequent Soybean Production In A Corn-Soybean Crop Rotation (A Progress Report), Justin Clark, James R. Russell, Douglas Karlen, Darrell Busby, L. James Secor, Brian Peterson, Larry Pellack, Carroll Olsen, Shawn C. Shouse

Iowa State Research Farm Progress Reports

The highest cost to beef cow-calf producers is the feeding of stored feeds in winter months. To lower feed costs, many producers will try to extend the grazing season into the winter. The primary resource for winter grazing in the Midwest is corn crop residues. On the average, corn crop residue grazing will reduce the amount of hay needed to maintain cows by approximately one-half ton per acre grazed over the winter. Although crop residue grazing is quite effective in reducing feed costs, some producers are concerned that corn residue grazing will have an adverse effect on soybean yields the ...


Evaluation Of Year-Round Forage Management Systems For Spring- And Fall-Calving Beef Cows, N. A. Janovick, James R. Russell, D. Maxwell, L. James Secor Jan 2001

Evaluation Of Year-Round Forage Management Systems For Spring- And Fall-Calving Beef Cows, N. A. Janovick, James R. Russell, D. Maxwell, L. James Secor

Iowa State Research Farm Progress Reports

Stored feeds make up almost half the cost of production for cow-calf enterprises in Iowa. Therefore, any reduction in the amount of stored feeds needed to maintain cows through the winter can have an impact on overall costs of maintaining the herd. Two resources that may be used to reduce the use of stored feeds are corn crop residues and stockpiled perennial forages, which may be grazed during the winter. The objective of this experiment was to design and evaluate grazing systems to utilize such resources.


The Effect On Meat Quality Of Integrating Pasturing Systems Into Cattle Finishing Programs, Tracy A. Williams, M. Peter Hoffman Jan 2001

The Effect On Meat Quality Of Integrating Pasturing Systems Into Cattle Finishing Programs, Tracy A. Williams, M. Peter Hoffman

Iowa State Research Farm Progress Reports

Forage source and quality in finishing cattle programs continue to be a source of concern because of economics and also because of their impact on beef eating qualities. The integration of pasturing systems for cattle finishing programs should allow the producer to produce a leaner and possibly more economical beef supply thus benefiting the consumer and the producer. This experiment was designed to investigate alternative pasture management systems for finishing cattle and to study the impact on meat quality.


Pasture Improvements With Mixed Composition Of Warm-Season Grasses And Legumes, I. S. Braden, Kenneth J. Moore, Roger L. Hintz, M. H. Wiedenhoeft, E. Charles Brummer, M. Peter Hoffman Jan 2001

Pasture Improvements With Mixed Composition Of Warm-Season Grasses And Legumes, I. S. Braden, Kenneth J. Moore, Roger L. Hintz, M. H. Wiedenhoeft, E. Charles Brummer, M. Peter Hoffman

Iowa State Research Farm Progress Reports

Forage growth is an important part of sustainable livestock production and grazing. Iowa pastures consist mainly of cool-season grasses, and this limits the amount of forage available for livestock production during hot summer months. By establishing warm-season grasses in pastures, the overall efficiency of forage growth is improved for livestock production. Legumes can help provide nitrogen for neighboring grasses in pastures. The addition of legumes to the warm-season grass mixtures can help to improve forage quality and reduce the amount of nitrogen fertilizer that is needed. The overall objective of this research is to improve warm-season pasture productivity for livestock ...


Performance Of Pigs In A Swedish, Bedded Group Lactation And Nursery System, M. E. Larson, Mark S. Honeyman Jan 2001

Performance Of Pigs In A Swedish, Bedded Group Lactation And Nursery System, M. E. Larson, Mark S. Honeyman

Iowa State Research Farm Progress Reports

In the 1980s, Swedish swine producers were forced to develop several production models to remain profitable due to the strict legal policies facing the swine industry. By 1994, approximately 150 Swedish farms were using a sustainable model for pig production. This model, a deep-bedded, group housing system for pregnant, farrowing, and nursing sows and their litters, was known as the Västgömodel. Ljungström and Thorstensson are two versions of the Västgömodel system. In the Ljungström system, sows farrow in conventional pens and are moved with their litters to group nursing rooms after the pigs are 10 to 14 days old. In ...


Performance Of Barrows And Gilts In Hoop Structures And Confinement During Winter And Summer, Mark S. Honeyman, A. D. Penner Jan 2001

Performance Of Barrows And Gilts In Hoop Structures And Confinement During Winter And Summer, Mark S. Honeyman, A. D. Penner

Iowa State Research Farm Progress Reports

The objectives of the study were to document the performance of barrows and gilts fed in hoops during the summer and winter, and to evaluate barrow and gilt performance in hoops compared with barrows and gilts in a confinement housing system.


Beef Cattle Breeding Project Progress Report: Body Composition Epds Determined From Ultrasound Measures, Doyle E. Wilson, Abebe T. Hassen, Gene H. Rouse, Richard G. Tait Jr. Jan 2001

Beef Cattle Breeding Project Progress Report: Body Composition Epds Determined From Ultrasound Measures, Doyle E. Wilson, Abebe T. Hassen, Gene H. Rouse, Richard G. Tait Jr.

Iowa State Research Farm Progress Reports

The Iowa State University beef cattle breeding project was initiated in 1996, and is being conducted at the Rhodes and McNay Research and Demonstration Farms. The project uses the field data of the American Angus Association (AAA) along with the research resource cattle of the farms to study questions that will enhance the genetic investigations using the field data.


Effects Of Corn Crop Residue Grazing On Soil Physical Properties And Subsequent Soybean Production In A Corn-Soybean Crop Rotation (A Progress Report), Justin Clark, James R. Russell, Douglas Karlen, Darrell Busby, L. James Secor, Brian Peterson, Larry Pellack, Carroll Olsen, Shawn C. Shouse Jan 2001

Effects Of Corn Crop Residue Grazing On Soil Physical Properties And Subsequent Soybean Production In A Corn-Soybean Crop Rotation (A Progress Report), Justin Clark, James R. Russell, Douglas Karlen, Darrell Busby, L. James Secor, Brian Peterson, Larry Pellack, Carroll Olsen, Shawn C. Shouse

Iowa State Research Farm Progress Reports

The highest cost to beef cow-calf producers is the feeding of stored feeds in winter months. To lower feed costs, many producers will try to extend the grazing season into the winter. The primary resource for winter grazing in the Midwest is corn crop residues. On the average, corn crop residue grazing will reduce the amount of hay needed to maintain cows by approximately one-half ton per acre grazed over the winter. Although crop residue grazing is quite effective in reducing feed costs, some producers are concerned that corn residue grazing will have an adverse effect on soybean yields the ...


Effect Of Mga On Performance, Sexual Behavior, Carcass Quality And Tenderness In Mixed-Sex Pens Of Cattle, Darrell Busby, Daniel D. Loy, Gene H. Rouse, Dallas L. Maxwell Jan 2001

Effect Of Mga On Performance, Sexual Behavior, Carcass Quality And Tenderness In Mixed-Sex Pens Of Cattle, Darrell Busby, Daniel D. Loy, Gene H. Rouse, Dallas L. Maxwell

Iowa State Research Farm Progress Reports

The effect of MGA in mixed pens of steers and heifers was evaluated over a three-year period at the ISU Armstrong Research Farm near Lewis, Iowa. Two pens of approximately 40 head were fed diets with or without MGA in each of three replications. Estrus and riding activity was monitored using the Heat Watch system. At slaughter, in addition to routine carcass data collection, a rib sample was collected from each carcass for tenderness evaluation. There was no effect on dry matter intake due to MGA treatment. Mixed-sex pens that were fed MGA were 4% more efficient than controls. MGA-fed ...


Beef Cattle Breeding Project Progress Report: Growth-Trait Epds For 1998- And 1999-Born Calves, Abebe T. Hassen, Doyle E. Wilson, Gene H. Rouse, Richard G. Tait Jr. Jan 2001

Beef Cattle Breeding Project Progress Report: Growth-Trait Epds For 1998- And 1999-Born Calves, Abebe T. Hassen, Doyle E. Wilson, Gene H. Rouse, Richard G. Tait Jr.

Iowa State Research Farm Progress Reports

The Iowa State University beef cattle breeding project was designed to develop two selection lines of beef cattle for use as a research base to answer questions that influence genetic improvement. The project was started in 1996 and is being conducted at the Rhodes (central Iowa) and McNay (southern Iowa) research and demonstration farms.


Cows In The Corn Grazing Project, Lee H. Kilmer, Russell Bredahl, Dallas L. Maxwell Jan 2001

Cows In The Corn Grazing Project, Lee H. Kilmer, Russell Bredahl, Dallas L. Maxwell

Iowa State Research Farm Progress Reports

Corn is the most productive grass grown in Iowa with dry matter yields often exceeding 6 t/a. Harvesting corn by grazing can provide abundant pasture in mid- to late-summer when pastures in southern Iowa normally make little growth. This approach eliminates harvesting, drying, storage, and transportation costs associated with marketing the grain and leaves almost all of the surplus or waste nutrients in the field. Objectives of this project were to measure animal performance when standing corn crop was the sole feed source for pregnant diary heifers and to increase our understanding of the management practices necessary to optimize ...


Sequential Grazing Systems For Beef Cattle Production, Kenneth J. Moore, James R. Russell, M. H. Wiedenhoeft, E. Charles Brummer, Roger L. Hintz, L. James Secor, Dennis R. Maxwell Jan 2001

Sequential Grazing Systems For Beef Cattle Production, Kenneth J. Moore, James R. Russell, M. H. Wiedenhoeft, E. Charles Brummer, Roger L. Hintz, L. James Secor, Dennis R. Maxwell

Iowa State Research Farm Progress Reports

Pasture productivity in Iowa is often limited by low productivity of cool-season grasses during summer. This uneven seasonal distribution of for age production could be improved by including species in pasture systems that perform better under higher temperatures. Warm-season grasses produce most of their growth during summer when cool-season grasses are semi -dormant. By using cool-season and warm-season pastures in a sequential system it should be possible to improve seasonal productivity. The overall objective of this project i s to evaluate the productivity of sequential grazing system s for beef cattle production in Southern Iowa. Specific objectives are to: 1 ...


Sow And Litter Performance For Two Genotypes In Crated And Group Gestation Systems, Mark S. Honeyman, D. Kent Jan 2001

Sow And Litter Performance For Two Genotypes In Crated And Group Gestation Systems, Mark S. Honeyman, D. Kent

Iowa State Research Farm Progress Reports

The effects of swine gestation housing on sow and litter performance of two genotypes were evaluated at the Iowa State University Lauren Christian Swine Research and Demonstration Farm near Atlantic, IA. The gestation housing systems were 1) individual gestation crates in a mechanically ventilated, manure flush confinement building with a partially slatted floor (CRATE); 2) group pens in a naturally ventilated, curtain-sided, modified-open front building with a partially slatted floor, no bedding and a deep manure pit (MOF); and 3) group pens in deepbedded, naturally ventilated hoop structures (HOOP). The group-housed gilts were individually fed with either individual feed stalls ...


Beef Cattle Breeding Project Progress Report: Body Composition Epds Determined From Ultrasound Measures, Doyle E. Wilson, Abebe T. Hassen, Gene H. Rouse, Richard G. Tait Jr. Jan 2001

Beef Cattle Breeding Project Progress Report: Body Composition Epds Determined From Ultrasound Measures, Doyle E. Wilson, Abebe T. Hassen, Gene H. Rouse, Richard G. Tait Jr.

Iowa State Research Farm Progress Reports

The Iowa State University beef cattle breeding project was initiated in 1996, and is being conducted at the Rhodes and McNay Research and Demonstration Farms. The project uses the field data of the American Angus Association (AAA) along with the research resource cattle of the farms to study questions that will enhance the genetic investigations using the field data.


The Effect Of Housing System And Physical Environment On Post-Weaning Pig Performance, Michael E. Larson, Mark S. Honeyman Jan 2001

The Effect Of Housing System And Physical Environment On Post-Weaning Pig Performance, Michael E. Larson, Mark S. Honeyman

Iowa State Research Farm Progress Reports

Many small independent pork producers have shown interest in low-cost alternative production systems for raising market pigs. One low-cost alternative production housing type that is gaining popularity is the bedded hoop structure. Hoop structures are primarily used as finishing facilities, but may also be used for gestation housing, breeding and isolation facilities, gilt development and bedding storage. Recently, a new concept called wean-to-finish has been adopted by the swine industry. This unique approach is the adaptation of technologies used in the nursery and grow/finish phase into a single-stage production system. Bedded hoop structures may work as a wean-to-finish housing ...


The Effect Of Housing System And Physical Environment On Post-Weaning Pig Performance, Michael E. Larson, Mark S. Honeyman Jan 2001

The Effect Of Housing System And Physical Environment On Post-Weaning Pig Performance, Michael E. Larson, Mark S. Honeyman

Iowa State Research Farm Progress Reports

Many small independent pork producers have shown interest in low-cost alternative production systems for raising market pigs. One low-cost alternative production housing type that is gaining popularity is the bedded hoop structure. Hoop structures are primarily used as finishing facilities, but may also be used for gestation housing, breeding and isolation facilities, gilt development and bedding storage. Recently, a new concept called wean-to-finish has been adopted by the swine industry. This unique approach is the adaptation of technologies used in the nursery and grow/finish phase into a single-stage production system. Bedded hoop structures may work as a wean-to-finish housing ...


Two Year Summary Of The Performance Of Finishing Pigs In Hoop Structures And Confinement During Winter And Summer, Mark S. Honeyman, Jay D. Harmon Jan 2001

Two Year Summary Of The Performance Of Finishing Pigs In Hoop Structures And Confinement During Winter And Summer, Mark S. Honeyman, Jay D. Harmon

Iowa State Research Farm Progress Reports

The objectives of the study were to document the performance of finishing pigs in hoops during the summer and winter, and to evaluate pig performance in hoops compared with pigs in a confinement housing system.