Spring runoff and drainage N and P losses from hog-manured corn
January 1, 1991By G. Gangbazo
A two-year study was conducted to assess the effect of hog manure on the losses of nitrogen and phosphorus in runoff and drainage from grain-corn (Zea mays L.) plots, and the importance of spring...
Treatment of pig slurry using the pump-stirred aerator
January 1, 1991By D. W. Williams
An experimental aeration system, called a pump-stirred aerator (PSA) was tested. The PSA consisted of an 11 kw centrifugal pump circulating liquid to and from a 10 msuperscript 3 tank and injecting...
Phosphorus movement through a coastal plain soil after a decade of intensive swine manure application
January 1, 1991By J. M. Novak
Understanding the movement of phosphorus (P) in soils receiving heavy animal waste application is important for nonpoint-source pollution control. We investigated both P accumulation in soil and...
Treatment of liquid swine manure in the sequencing batch reactor under aerobic and anoxic conditions
January 1, 1991By L. Fernandes
Laboratory studies were conducted on a sequencing batch reactor (SBR) for the treatment of screened liquid pig manure. The SBR was operated on the basis of a 24 h cycle at 6 and 90 days hydraulic...
Methods for evaluating odor from swine manure
January 1, 1991
Two odor evaluation methods were tested during a 12-week dynamic experiment on the effects of a commercial additive on swine manure in anaerobic storage. One method was a rating method which combined...
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...
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...
Effect of long-term swine effluent application on selected soil properties
January 1, 1990By Ardeshir Adeli
Improving swine effluent management practices requires understanding of the fate of nutrients derived from swine effluent in soil quality. This study was conducted to evaluate the effects of...
GLEAMS Simultation of Groundwater Nitrate-N From Row Crop and Swine Wastewater Spray Fields in the Eastern Coastal Plain
January 1, 1990By Kenneth C. Stone
Nonpoint source pollution of surface and groundwater resulting from agricultural management practices is a major water quality problem. This problem was assessed on a demonstration watershed in the...
Swine manure nitrogen conservation in storage using sphagnum moss
January 1, 1990
Sphagnum peat moss, floating on swine manure in storage, was tested during three summers as an N conservation method in experimental tanks which measured 0.75 m in diameter and 3.0 m deep. Three...
Swine-lagoon seepage in sandy soil
January 1, 1990By Phillip W. Westerman
Swine manure anaerobic lagoons have sometimes been constructed in sandy soil without clay liners. Although swine manure and other animal manures have been reported to physically ''seal'' lagoons to...
Using GLEAMS and REMM to estimate nutrient movement from a spray field and through a riparian forest.
January 1, 1990By Kenneth C. Stone
With the increased number of large animal production facilities in eastern North Carolina, nutrient accumulation is becoming a problem in surface waters and groundwater. To protect these water...
