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...
Evaluation of overland flow treatment for swine lagoon effluent
January 1, 1992By Gary L. Hawkins
Overland flow, on slopes of 5 and 11%, was used as a means of treating wastewater effluent from the second cell of a swine waste anaerobic lagoon system. Wastewater samples from both surface runoff...
Surface water quality impacts of tillage practices under liquid swine manure application
January 1, 1992By R. P. Rudra
Field studies were conducted to investigate the effects of tillage practices on the saturated hydraulic conductivity, and quantity and quality of surface runoff water resulting from the application...
Effectiveness of Vegetative Filter Strips in Retaining Surface-Applied Swine Manure Constituents
January 1, 1992By Indrajeet Chaubey
Simulated rainfall was used to evaluate the effectiveness of vegetative filter strips (VFS) of varying lengths (0, 3, 6, 9, 15, and 21 m) in reducing sediment and nutrient losses from plots treated...
Aeration Experiments for Swine Waste Composting
January 1, 1992
A study was undertaken to investigate aeration in the composting of swine manure. Three sets of aeration experiments were conducted to determine the optimum aeration rate. Both continuous and...
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...
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...
