Effect of supplemental phytase and ideal dietary amino acid ratios in covered and hulless-barley-based diets on pig performance and excretion of phosphorus and nitrogen in manure
January 1, 1997By R. R. Grandhi
A total of 144 (72 barrows + 72 gilts) crossbred pigs were used to determine the effect of feeding supplemental phytase and ideal dietary amino acid ratios in covered barley (CB) or hulless barley...
Soil microbial populations, community composition, and activity as affected by repeated applications of hog and cattle manure in eastern Saskatchewan
January 1, 1997By J. R. de Freitas
A field site near Humboldt, Saskatchewan, was annually treated with hog or cattle manure and cropped to canola, spring wheat, barley, and canola from 1997 to 2000. During each growing season, soil...
Swine lagoon effluent disposal by overland flow: Effects on forage production and uptake of nitrogen and phosphorus
January 1, 1997By Fuhan Liu
Swine (Sus scrofa) production requires economical and environmentally safe waste management systems, The objective of this study was to determine the effect of swine lagoon effluent on dry matter...
Anaerobic treatment of swine waste by the anaerobic sequencing batch reactor
January 1, 1997By R. H. Zhang
Anaerobic sequencing batch reactor (ASBR) uses a high-rate anaerobic bioconversion process to stabilize organic wastes for odor control and generate biogas for energy use. It is well suited for...
Use of urease inhibitors to control nitrogen loss from livestock waste
January 1, 1997By Vincent H. Varel
Current waste management systems for cattle feedlots and swine facilities result in nitrogen losses of approx. 75%. Most of this loss occurs through the rapid hydrolysis of urinary nitrogen (urea) to...
Phosphorus loss to runoff water twenty-four hours after application of liquid swine manure or fertilizer
January 1, 1997By H. Tabbara
Phosphorus (P) added to soil from fertilizer or manure application could pose a threat to water quality due to its role in eutrophication of fresh water resources. Incorporating such amendments into...
Soil carbon and nitrogen dynamics following application of pig slurry for the 19th consective year. II. Nitrous oxide fluxes and mineral nitrogen
January 1, 1997
Agricultural soils often receive annual applications of manure for long periods. Our objective was to quantify the effects of 19 consecutive years of pig (Sus scrofa) slurry (PS) application to a...
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...
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...
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...
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...
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...
