Estimated seepage losses from established swine waste lagoons in the lower coastal plain of North Carolina
January 1, 1995By Rodney L. Huffman
Eleven well-established, swine waste lagoon systems in the lower coastal plain of North Carolina were examined for evidence of seepage losses to the superficial aquifer. The sites were selected to...
Edge-of-field losses of surface-applied animal manure
January 1, 1995
Poultry and swine production are important aspects of Arkansas agricultural economy. As these industries have grown, so have concderns regarding the proper utilization and disposal of the associated...
Simulated and measured effect of rectangular obstructions on carbon dioxide gas dispersion in a scaled swine building
January 1, 1995By S. J. Hoff
Gas dispersion from shallow manure storage pits was experimentally measured and mathematically modeled in a 1:6-scale ventilation chamber. The chamber represents a geometrically scaled model of a...
Modeling the effects of diet formulation on nitrogen and phosphorus excretion in swine waste
January 1, 1995
Two weight classes of growing-finishing swine were fed corn-soybean diets lower in protein and phosphorus to determine the reduction in nitrogen (N) and phosphorus (P) in swine waste when compared to...
Mathematical Modeling of Phosphorus Losses from Land Application of Hog and Cattle Manure
January 1, 1995By R. F. Grant
Mathematical models may provide a means to estimate phosphorus (P) losses from land application of manure. Phosphorus losses typically occur during brief episodes of runoff and erosion. Models must...
Evaluation of nitrogen isotopes as indicators of nitrate contamination sources in an agricultural watershed
January 1, 1995
Determining the relative contributions of nitrate contamination in agricultural watersheds characterized by applications of both mineral and animal waste nitrogen to fields is important in...
Effects of swine lagoon effluent relative to commercial fertilizer applications on warm-season forage nutritive value
January 1, 1995By A. Adeli
Two field experiments were conducted to evaluate the effects of comparable rates of swine lagoon effluent and commercial fertilizer at different harvest dates on dry matter yield and nutritive value...
Removal of nitrogen from swine manure wastewaters by ammonia stripping
January 1, 1995
Laboratory-scale experiments were undertaken to investigate aeration and air stripping as methods for removing ammonia from swine waste waters with high nitrogen contents. The effects of temperature,...
Removal of airborne swine dust by electrostatic precipitation
January 1, 1995
An electrostatic precipitator used in conjunction with a recirculation duct was developed to remove airborne pig dust from an environmental chamber. The collection efficiency of the precipitator was...
Potential reduction of struvite formation from anaerobic swine lagoon effluent by treatment in constructed wetlands
January 1, 1994By Dennis M. Sievers
Effluents from both cells of a two-cell anaerobic lagoon system treating flushed swine waste from the University of Missouri Swine Farm were treated in parallel constructed wetlands - submerged flow...
Headspace analysis of malodorous compounds from swine wastewater under aerobic treatment
January 1, 1994By A. Chen
Static headspace sampling and gas chromatograph (GC) analyses were used to monitor the concentration of malodorous compounds (volatile fatty acids (VFA), phenol, p-cresol, indole, and skatole)...
Effects of swine lagoon effluent and commercial fertilizer applications on phosphorus status of an acid and alkaline soil
January 1, 1994By Ardeshir Adeli
Two separate field experiments were conducted in Brooksville, Mississippi to evaluate the effects of swine lagoon effluent relative to inorganic fertilizer at equivalent rates on phosphorus (P)...
