Odor measurements from manure storages on Minnesota pig farms
January 1, 1996
Data collected from 30 pig manure stores in Minnesota, USA, shows a wide range of both odour dilution thresholds and hydrogen sulfide concentrations during moderate autumn weather conditions. A...
Groundwater nitrate depletion in a swine lagoon effluent-irrigated pasture and adjacent riparian zone
January 1, 1996By A. J. Sloan
Irrigation of anaerobic swine lagoon effluent onto cattle-grazed grass pastures represents a common waste treatment method in the Coastal Plain of North Carolina. However, such treatment strategies...
Air quality and emission measurement methodology at swine finishing buildings
January 1, 1996
Reliable measurements of air quality and emissions at large livestock buildings with inherently large spatial and temporal variations of pollutant concentrations are relatively difficult and...
Agronomic and environmental soil phosphorus testing in soils receiving liquid swine manure
January 1, 1996
There is uncertainty concerning evaluation of bioavailable P in manured soils. This study assessed P availability in manured Iowa soils by measuring soil P with agronomic and environmental P tests...
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...
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,...
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...
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...
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...
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...
