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Industry Partners
Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
Nitrate leaching under spring barley is influenced by the presence of a ryegrass catch crop: Results from a lysimeter experiment
Posted in: Environment by admin on January 1, 2005 | No Comments
Survey of Water-Extractable Phosphorus in Livestock Manures
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Poly(vinyl alcohol)/Compost Composites for Biofiltration of Swine Waste Volatiles
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Livestock Operations & Groundwater Quality
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Most people living in rural areas of Manitoba rely on groundwater as their primary source of water. To protect and preserve the quality of belowground water sources, it is important that agricultural producers operate in a responsible manner as stewards not only of the land but also of the water under the land.
Livestock operations are a potential source of groundwater contamination.
– The risk of impacts on potable groundwater supplies can be minimized by:
– locating manure structures, outdoor pens and field manure storage in areas underlain by thick clay
materials
– minimizing the duration of field manure storage before spreading
– applying manure at proper agronomic rates as a fertilizer with due consideration for crop
requirements, soil texture and sensitivity of underlying aquifers.
The Effects of Air Injection on the Pipeline Transport of Cattle and Pig Slurries
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(published in revised form 4 April 2005; published online 13 June 2005) A large-scale pipeline apparatus was used to investigate the effects of air injection on the properties of turbulent liquid flows in horizontal pipelines of different internal diameters (381, 508, 762 and 102 mm). The liquids included clean water, pig slurries with total solid concentrations up to 44% and dairy cattle slurries with total solid concentrations up to 55%. The superficial flow velocities were between 05 and 6 m/s and air injection rates ranged from 1 to 6% (v/v) at the point of injection.
Experimental data were collected in the form of corresponding values of flow rate and pressure gradient. These showed that air injection generally increased pressure gradients compared with the liquids flowing alone. However, inspection of the data indicated a tendency towards pressure gradient reductions if air is injected into cattle slurries containing more than 55% total solids.
It was shown that a simple linear model could represent the changes in pressure gradient brought about by air injection, and that this could provide a satisfactory procedure for the design of slurry pipelines with air injection.
Odour and ammonia emissions from intensive pig units in Ireland
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FILTRATION OF EFFLUENTS FOR MICROIRRIGATION SYSTEMS
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