The effects of manure application on soil aggregation
January 1, 2008By C. S. Wortmann
Surface application of manure may increase the risk of phosphorus loss in runoff. Manure application, however, often results in increased soil aggregate stability with reduced runoff and erosion and,...
Environmental Aspects of Ethical Animal Production
January 1, 2008
Livestock and poultry producers face a number of challenges including pressure from the public to be good environmental stewards and adopt welfare-friendly practices. In response, producers often...
Modeling studies of ammonia dispersion and dry deposition at some hog farms in North Carolina
January 1, 2008By Bajwa Kanwardeep S.
A modeling study was conducted on dispersion and dry deposition of ammonia taking one hog farm as a unit. The ammonia emissions used in this study were measured under our OPEN (Odor, Pathogens, and...
Modeling hydrogen sulfide emissions across the gas-liquid interface of an anaerobic swine waste treatment storage system
January 1, 2008By Jessica Blunden Viney P. Aneja Department of Marine
Hydrogen sulfide (H2S) is a colorless gas emitted during decomposition of hog manure that produces an offensive "rotten egg" smell and is considered a toxic manure gas. In the southeastern...
Greenhouse gas emissions from two soils receiving nitrogen fertilizer and swine manure slurry
January 1, 2008
The interactive effects of soil texture and type of N fertility (i.e., manure vs. commercial N fertilizer) on N2O and CH4 emissions have not been well established. This study was conducted to assess...
Nitrous oxide emissions and soil mineral nitrogen status following application of hog slurry and inorganic fertilisers to acidic soils under forage grass
January 1, 2008By Mkhabela M. S
Field application of livestock slurry often results in higher nitrous oxide (N2O) emissions than inorganic fertiliser, because slurry contains large amounts of available N and C, and when applied it...
Effects of cycle-frequency and temperature on the performance of anaerobic sequencing batch reactors (ASBRs) treating swine waste
January 1, 2008By P.M. Ndegwa Biological Systems Engineering Department
Anaerobic digestion of animal waste is a technically viable process for the abatement of adverse environmental impacts caused by animal wastes; however, widespread acceptance has been plagued by poor...
Environment - Air
Particulates, Ammonium Nitrate, and Ammonium Sulfate: Effects on Air Quality in Rural Iowa
December 26, 2007By R. L. Pfeiffer
Air quality has many components, one of which is PM2.5 and ammonium nitrate and ammonium sulfate are reported to be two of the major components. Swine confinement facilities generate significant...
Pork Safety - Pre-Harvest
Risk Assessment for Salmonella spp. in Cooked Pork
December 4, 2007By Arthur Miller
The purpose of this research was to develop a retail-to-table risk assessment to evaluate the likelihood of developing salmonellosis from consumption of a serving of enhanced or un-enhanced pork...
Pork Safety - Pre-Harvest
Development of Antibiotic Usage Information in Swine
November 2, 2007By John Deen
There exists global concern about the emergence of antibiotic-resistant strains of bacteria and their potential relationship to antimicrobial use in food animal production. Despite this, the U.S....
