Surface application of liquid swine manure: Chemical variability
January 1, 1992By Michael E. Essington
The determination of manure loading rates for crop production is complicated by the temporal variability in manure nutrient concentrations and the difficulty in obtaining representative samples on...
Odor control in liquid hog manure by added amendments and aeration
January 1, 1992
A reduction in the emission of malodorous gases from liquid hog manure (LHM) would represent an advantage for LHM use in agricultural systems. Procedures for the reduction of disagreeable odors...
Field odor measurement and applications of Gaussian plume model
January 1, 1992
Field measurements of odour intensity around a slurry tank and 200-sow swine unit were conducted. Odour intensity from 0 to 3 were defined as none, detectable, strong, and very strong, respectively....
Effect of swine lagoon water application rate and alfalfa harvest frequency on dry matter production and N harvest
January 1, 1992
Swine (Sus scrofa domesticus) lagoon water can supply valuable fertilizer nutrients for field crops. Reduced land availability and increased swine operation size can potentially create situations...
Effects of swine lagoon effluent application on chemical properties of a loamy sand
January 1, 1992By F. Liu
In order to determine the effects of lagoon effluent application on soil chemical properties, swine lagoon effluent was applied to land with a 10% slope by an overland flow irrigation system on...
Performance of four constructed wetlands treating anaerobic swine lagoon effluents
January 1, 1992
Effluents from both cells of a two-cell anaerobic lagoon system beating flushed swine waste were loaded into two types of constructed wetlands [submerged flow (SF) and free water surface (FWS)]. The...
Nitrogen distribution in soils of constructed wetlands treating lagoon wastewater
January 1, 1992By Ariel A. Szögi
Constructed wetlands have the potential to be used for treatment of N-rich livestock wastewater. Our objectives were to evaluate both the time effect and increasing N loading rates on soil N...
Swine manure and N-management systems: impact on groundwater quality
January 1, 1992By R. S. Kanwar
Field studies were initiated in the fall of 1992, to evaluate the effects of nine alternative nitrogen (N), tillage, and crop management strategies on N loss to the shallow groundwater. The tillage...
Concentration of respirable dust and bioaerosols and identification of certain microbial types in a hog-growing facility
January 1, 1991
In order to assess the effects of ventilation rate, temperature, relative humidity and source of air on bioaerosol levels and dust with particle size <10 micro m, a total of 120 pigs housed in 12...
Farrowing building air quality survey
January 1, 1991
Two hundred farrowing houses were surveyed to measure ammonia, relative humidity, total dust and temp. to determine the adequacy of pig housing ventilation. Research was carried out to determine the...
