Nitrogen cycling through swine production systems: ammonia, dinitrogen, and nitrous oxide emissions
January 1, 1997By Lowry A. Harper
Ammonia (NH3) emissions from animal systems have become a primary concern for all of livestock production. The purpose of this research was to establish the relationship of nitrogen (N) emissions to...
Controlling odor and volatile substances in liquid hog manure by amendment
January 1, 1997
Five commercial pit additive products were examined for effectiveness of controlling the release of odorous and volatile compounds from swine manure. pH, volatile fatty acids, total solids, total...
Nutrient Losses from Unlined Bedded Swine Hoop Structures and an Associated Windrow Composting Site
January 1, 1997By Tom L. Richard
Mass balance analysis of livestock manure management systems can offer important insight into the flows and losses of nutrients and potential pollutants. This study describes the objectives,...
Composting hog manure/sawdust mixtures using intermittent and continuous aeration: ammonia emissions
January 1, 1997
Odorous emissions from manures have become a significant problem. Preliminary work on composting hog manure with sawdust had indicated that intermittent aeration could reduce ammonia emissions during...
Bacteria and nutrient transport to tile lines shortly after application of large volumes of liquid swine manure
January 1, 1997
The rapid growth and concentration of the livestock production industry has increased concerns about potential water quality problems from land application of manure. A study was conducted using 14...
Effect of dietary ideal amino acid ratios, and supplemental carbohydrase in hulless-barley-based diets on pig performance and nitrogen excretion in manure
January 1, 1997By R. R. Grandhi
Two experiments were conducted, using a total of 224 (112 barrows + 112 gilts) crossbred pigs, to determine the effect of dietary ideal amino acid ratios, and supplemental carbohydrase in hulless...
Determination of odor-annoyance-free setback distances from animal production sites: Part I. Review and experiment
January 1, 1997
The objective of the study was to develop a science-based model, OFFSET (Odor from Feedlot - Setback Estimation Tool), to establish setback distances from animal production sites based on the use of...
Nitrate movement in shallow ground water from swine-lagoon-effluent spray fields managed under current application regulations
January 1, 1997
Rapid increases in the swine (Sus scrofa domestica) population in the 1990s and associated potential for nitrate N pollution of surface waters led the state of North Carolina to adopt stringent waste...
Above and below ground measurements of greenhouse gases from swine effluent amended soil
January 1, 1997By M. R. Bender Department Environmental and Technology Studies St. Cloud State University St. Cloud
As a means of economic disposal and to reduce need for chemical fertilizer, waste generated from swine production is often applied to agricultural land. However, there remain many environmental...
Odor removal using biomass filters
January 1, 1997By Steve Hoff
An experimental biomass filter system was built by attaching a full-scale testing chamber to an existing 4-room swine nursery facility to investigate various biomass filters. Four independent biomass...
