Tracing nitrate transport and environmental impact from intensive swine farming using delta nitrogen-15
January 1, 1997
Natural-abundance delta15N showed that nitrate generated from commercial land application of swine (Sus scrofa domesticus) waste within a North Carolina Coastal Plain catchment was being discharged...
Environment - Air
Hydrogen sulphide emission from two large pig-finishing buildings with long-term high-frequency measurements
January 1, 1997
Hydrogen sulfide (H2S) is a common toxic air pollutant and is emitted from decomposing manure at animal facilities. However, there have been only a few studies of H2S emissions from animal buildings,...
Effect of long-term liquid pig manure application on atrazine mineralization in a soil cultivated with maize
January 1, 1997By P.C. Bigwaneza
Soil samples were collected in plots from a field experiment in maize monoculture receiving 0, 60 and 120 m3 ha-1 liquid pig manure (LPM) for 19 years. Soils were sampled from the 0- to 20-cm layer...
Seasonal variation in microbial communities and organic malodor indicator compound concentrations in various types of swine manure storage systems
January 1, 1997
Anaerobic manure storage systems are one of the major contributors to the odour and environmental pollution associated with swine (Sus scrofa) production systems. The microbial ecology of manure...
Nutrient input and removal trends for agricultural soils in nine geographic regions in Arkansas
January 1, 1997By Nathan A. Slaton
Knowledge of the balance between nutrient inputs and removals is required for identifying regions that possess an excess or deficit of nutrients. This assessment describes the balance between the...
Ammonia and nitrous oxide emissions from sprinkler irrigation applications of swine effluent
January 1, 1997
In the USA, swine operations produce more than 14 Tg of manure each year. About 30% of this manure is stored in anaerobic lagoons before effluent applications to land. Although land application is...
Performance of swine waste lagoons for removing Salmonella and enteric microbial indicators
January 1, 1997By Vincent R. Hill
Swine lagoon liquid may contain numerous pathogens at concentrations that are a risk to human health through on-farm contact or through off-farm exposure, such as may occur if the pathogens are...
N-management and crop rotation effects on yield and residual soil nitrate levels
January 1, 1996
Swine production facilities are becoming more concentrated in Iowa, and public is concerned about the impact of using swine manure for crop production on soil and water quality. This field study was...
Environment - Air
Liquid balance model for swine waste management systems using single-stage anaerobic lagoons
January 1, 1996By Hector J. Cumba
The most important wastewater operation for farmers using lagoons to treat swine waste is maintaining the liquid level within the operational levels to avoid overflows and to satisfy the water demand...
Nitrification options for pig wastewater treatment
January 1, 1996By A. A. Szogi
Nitrification is a necessary and often limiting process in animal waste treatment for removal of nitrogen as N-2 through biological nitrification/denitrification systems. We evaluated three...
