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...
Impact of swine waste application on ground and stream water quality in an eastern coastal plain watershed
January 1, 1990By K. C. Stone
Nonpoint source pollution from agriculture has been a major concern, particularly where intensive agricultural operations exist near environmentally sensitive waters. To address these concerns, a...
Measurement and impact of agricultural odors from a large scale swine production farm
January 1, 1990
With the move on a nationwide scale to greater centralization and specialization of swine production and consequent swine confinement, rural communities face the prospects of increasing odor impact...
Electrostatic precipitation dust removal system for swine housing
January 1, 1990
The research objectives were to develop and evaluate a practical dust removal method for livestock housing using ionization and electrostatic precipitation. Prototype testing was conducted in an...
Ammonia emissions from a large swine production complex
January 1, 1990
Observations were made of a 1000-sow pig complex in Virginia, USA, to determine atmospheric ammonia loadings. Comparisons were made with similar data from the Netherlands, where ammonia release was...
Long-term effects of liquid hog manure on the phosphorus status of a silt loam cropped to corn
January 1, 1989By I. Royer
Repeated application of animal manure or mineral P fertilizer can significantly increase soil P content and enhance the risk of water contamination. The objectives of this study were to evaluate the...
Seepage and electromagnetic terrain conductivity around new swine lagoons
January 1, 1989By Rodney L. Huffman
Three swine lagoons in North Carolina's coastal region are monitored with electromagnetic terrain conductivity (EM) surveys and wells. One lagoon, in Norfold series clay soil, shows no significant...
Water contamination by ammonium nitrogen following the spreading of hog manure and mineral fertilizers
January 1, 1989By A. R. Pesant
Inappropriate fertilization practices in regions where livestock manure exceeds crop requirements may cause pollution by NH4+-N) during snowmelt. Annual and seasonal NH4+-N losses were evaluated for...
Performance of a continuous belt microscreening unit for solid liquid separation of swine waste
January 1, 1988By L. Fernandes
A new mechanical device for the pretreatment of animal waste was developed to separate pig waste into solid and liquid fractions using an endless belt made of filter material and continuously cleaned...
