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Iowa State University

Agriculture and Environment Extension Publications

1997

Engineering

Articles 1 - 11 of 11

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Livestock Industry Facilities And Environment: Swine Breeding Systems—The Breeding Square System, Jay D. Harmon, Carl Watson Sep 1997

Livestock Industry Facilities And Environment: Swine Breeding Systems—The Breeding Square System, Jay D. Harmon, Carl Watson

Agriculture and Environment Extension Publications

The breeding square is arranged with four breeding pens that are surrounded by turn-around crates. The two sides of the square facing each other are the same sex animal. The corners hold the gilts in pens. The center is divided into four breeding pens, each 11 ft by 11 ft. This system is designed for twenty boars, twenty sows, and sixteen gilts.


Livestock Industry Facilities And Environment: Swine Cooling Methods—Evaporative Pads, Jay D. Harmon Sep 1997

Livestock Industry Facilities And Environment: Swine Cooling Methods—Evaporative Pads, Jay D. Harmon

Agriculture and Environment Extension Publications

Evaporative pads are porous pads that are mounted on the sidewall of a building, wet with water, either by running water down it from the top or by spraying water on it with nozzles, and then air is drawn through the pad. This process, called evaporative cooling, uses heat in the air to evaporate water, thereby reducing the air temperature but increasing the humidity.


Livestock Industry Facilities And Environment: Swine Cooling Methods—Sprinkling, Jay D. Harmon Sep 1997

Livestock Industry Facilities And Environment: Swine Cooling Methods—Sprinkling, Jay D. Harmon

Agriculture and Environment Extension Publications

Sprinkling is a cooling method in which pigs are sprinkled with water and then the water is allowed to evaporate. Evaporation of water removes heat from the skin surface of the animals, thereby making them feel cooler.


Livestock Industry Facilities And Environment: Swine Breeding Systems—The Levis System, Jay D. Harmon, Carl Watson Sep 1997

Livestock Industry Facilities And Environment: Swine Breeding Systems—The Levis System, Jay D. Harmon, Carl Watson

Agriculture and Environment Extension Publications

The Levis System was developed by Dr. Don Levis at the University of Nebraska. The basic concept is housing of sows and boars in separate rooms. To heat check, sows are walked into the boar room. Because they have not been exposed to boars on a continuous basis, sows in standing estrus will “lock up” immediately because they are more sensitive to boar stimuli. Pens or stalls may be used for gestation housing.


Livestock Industry Facilities And Environment: Swine Breeding Systems—Effects Of Heat Stress, Jay D. Harmon Sep 1997

Livestock Industry Facilities And Environment: Swine Breeding Systems—Effects Of Heat Stress, Jay D. Harmon

Agriculture and Environment Extension Publications

The thermal environment in the breeding facility plays an important role in total herd management. This manifests itself in poor conception and farrowing rates that may not be detected until weeks or months past the occurrence of an improper thermal environment. Because of this, it is important to anticipate these potential lulls in breeding performance and counteract them by managing the breeding facility environment properly and adding additional open females to keep the facilities full.


Livestock Industry Facilities And Environment: Swine Cooling Methods—Drip Cooling, Jay D. Harmon Sep 1997

Livestock Industry Facilities And Environment: Swine Cooling Methods—Drip Cooling, Jay D. Harmon

Agriculture and Environment Extension Publications

Drip cooling systems are used to drip water on the shoulder of sows or boars in a crated situation. This allows evaporation of the water which removes heat from the neck where a large blood supply is present. It is best used for systems where the animal is confined below the drip nozzle. In farrowing crate usage it has been shown to reduce sow respiration rate, increase feed consumption and improve litter weights.


Livestock Industry Facilities And Environment: Swine Breeding Systems—The Lubbock System, Jay D. Harmon, Carl Watson Sep 1997

Livestock Industry Facilities And Environment: Swine Breeding Systems—The Lubbock System, Jay D. Harmon, Carl Watson

Agriculture and Environment Extension Publications

The Lubbock System places weaned sows in crates with a boar placed in a pen directly behind them. Usually one boar is housed behind five or six sows. The boar pen is used not only to house the boar but for breeding. Females are backed into the breeding pen when estrus is detected. Generally all five sows are not from the same weaning group. This prevents the boar from being over-used.


Livestock Industry Facilities And Environment: Swine Breeding Systems—The Mo-Flex System, Jay D. Harmon, Carl Watson Sep 1997

Livestock Industry Facilities And Environment: Swine Breeding Systems—The Mo-Flex System, Jay D. Harmon, Carl Watson

Agriculture and Environment Extension Publications

The MO-Flex Swine Building System allows for any production stage (Farrowing, Nursery, Grow-Finish and Breeding/Gestation) to be built using the same structural building shell design.


Safe Farm: 1996 Iowa Farm Injury And Fatality Data By County, Charles V. Schwab, Laura J. Miller Sep 1997

Safe Farm: 1996 Iowa Farm Injury And Fatality Data By County, Charles V. Schwab, Laura J. Miller

Agriculture and Environment Extension Publications

Injury and fatality data are listed by hospitalized or not hospitalized, and work or leisure related.


Livestock Industry Facilities And Environment: Swine Cooling Methods—Stirring Fans, Jay D. Harmon Sep 1997

Livestock Industry Facilities And Environment: Swine Cooling Methods—Stirring Fans, Jay D. Harmon

Agriculture and Environment Extension Publications

Stirring fans are used to increase the air flow across animals during hot weather or to reduce temperature stratification in ventilated rooms. Stirring fans may be either the basket type or the ceiling fan type. Both have distinctive uses.


Have You Checked Your Grain Bin?, Charles R. Hurburgh Jr. Mar 1997

Have You Checked Your Grain Bin?, Charles R. Hurburgh Jr.

Agriculture and Environment Extension Publications

The problem is with low test weight corn that was either slow to mature or did not fully mature before it was harvested last fall. Corn with a high moisture content may have been dried to 13-14 percent last fall, but those readings might not be reliable.