Release and Dispersion of Volatile Organic Compounds and Trace Gases From Swine Manure Systems in Iowa, Arkansas, and North Carolina
April 1, 1997By J.L. Hatfield
Release of gaseous compounds from swine manure storage systems has been poorly quantified; however, the perception of intensive amounts of gases is one of the larger problems for the pork industry....
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...
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...
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,...
Removal of Salmonella and microbial indicators in constructed wetlands treating swine wastewater
January 1, 1997By V. R. Hill
Reductions of Salmonella bacteria and enteric microbial indicator organisms were measured in swine wastewater treated by a field-scale surface flow (SF) constructed wetland at a commercial hog...
Swine wastewater treatment by media filtration
January 1, 1997By A. A. Szogi
A media filter was constructed to treat swine wastewater after anaerobic lagoon treatment. The media filter consisted of a tank (1.5-m-diameter x 0.6-m-height) filled with marl gravel. The marl...
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...
