Dietary manipulation to reduce ammonia concentrations in nursery pig facilities
January 1, 2001By A.J. Lewis
Two 4-wk trials (preliminary study) and three 5-wk trials (major study) were conducted to determine the effects of adding Yucca schidigera extract or anhydrous calcium chloride to nursery diets on...
A micrometeorological mass balance approach for greenhouse gas flux measurements from stored animal manure
January 1, 2001
Storage of animal manure is estimated to be a significant agricultural source of the greenhouse gases methane (CH4) and nitrous oxide (N2O). These estimates are, however, quite uncertain due to the...
Factors influencing the concentration of volatile fatty acids, ammonia, and other nutrients in stored liquid pig manure
January 1, 2001
In order to minimize odor and manage nutrients in liquid pig manure we need to be able to predict what operational practices most influence the concentrations of volatile fatty acids (VFAs), ammonium...
Gaseous nitrogen emissions and forage nitrogen uptake on soils fertilized with raw and treated swine manure
January 1, 2001
Treatments to reduce solids content in liquid manure have been developed, but little information is available on gaseous N emissions and plant N uptake after application of treated liquid swine...
Quantification of odors and odorants from swine operations in North Carolina
January 1, 2001
A total of 331 different volatile organic compounds (VOCs) and fixed gases from swine facilities in North Carolina, USA, were identified by gas chromatography (GC) and mass spectrometry. Of these,...
Effect of carvacrol and thymol on odor emissions from livestock wastes
January 1, 2001
A majority of the beef cattle and swine in the United States is produced in confined facilities. This generates significant environmental pollutants from the waste produced, including global warming...
Odor measurements for manure spreading using a subsurface deposition applicator
January 1, 2001
Odour emissions during manure spreading events have become a source of concern, particularly where farms are located nearby urban areas. The objective of the present study was to compare odour...
Geotextile fabric-straw manure storage covers for odor, hydrogen sulfide, and ammonia control
January 1, 2001
Manure storages are a major odour source. Straw and/or geotextile fabric covers can be used to reduce these odour emissions. Thirty-eight 160-litre (42-gal) open-topped PVC pipes (columns) containing...
Swine Health - General Disease
Demonstration of pathogenicity in CDCD pigs with a cytopathic agent isolated from farm with “Sow abortion and mortality syndrome”
November 27, 2000By Han Soo Joo
Swine Health - General Disease
Demonstration of porcine circovirus as the cause of postweaning multisystemic wasting syndrome
November 27, 2000By Charles Johnson
DEVELOPMENT OF A STANDARDIZED METHOD FOR ODOR QUANTIFICATION FROM LIVESTOCK WASTES: DEVELOPMENT OF A ODOR INDEX
November 15, 2000
Odor production is an issue of extreme importance to the swine industry. Indeed, it is becoming more difficult to operate a facility in the light of public sentiment and development of new facilities...
Environment - Air
Development of a Standardized Method for Odor Quantification from Livestock Wastes: Development of a Odor
November 15, 2000By Alan A. DiSpirito
