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...
An on-farm swine waste treatment system for odor control, byproduct recovery and treated wastewater reuse in Hawaii
January 1, 1997
A prototype of a pig waste treatment system for a 240-270 pig operation was investigated for its potential of odour control, byproduct utilization and treated wastewater reuse. The high solid portion...
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...
Characterization of volatile organic emissions and wastes from a swine production facility
January 1, 1997
Analytical methods for monitoring the volatile organic compound (VOC) emissions, for defining atmospheric transport coefficients, and for monitoring solution phase chemistry have been developed to...
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...
Characteristics of phototrophic and non-phototrophic lagoons for swine manure
January 1, 1996
Odors are a major result of inadequately sized and mismanaged anaerobic lagoons. However, purple or pink colored lagoons, indicating the presence of phototrophic purple bacteria, are less likely to...
Manure-Phosphorus in Soil: Detection and Mobility of Phytate
January 1, 1996
Annual swine effluent application in western Oklahoma for 11 consecutive years did not lead to significant accumulation of soil phosphorus. Similar trend was shown in a century-old field experiment...
Reduction of odor and volatile substances in pig slurries by using pit additives
January 1, 1996
The effects of five commercial pit additive products on the release of odour nuisance and volatile compounds from swine manure were examined. The changes of pH, volatile fatty acids, total solids,...
An Integrated Index of Electrical Energy Use in Canadian Agriculture with Implications for Greenhouse Gas Emissions
January 1, 1996By J.A. Dyer
Electricity is fundamental to many farm chores. In this paper quantitative indices of electrical energy use were developed which reflect direct on-farm decisions for measures that farmers can adopt...
Evaluating the use of straw and other floating materials to control odor and gases from pig manure storage units
January 1, 1996
The use of various floating covers on commercial manure storage units to control odour and H2S emissions was evaluated and the management requirements to maintain the covers were identified. When...
