Anaerobic decomposition of swine manure and ammonia generation in a deep pit
January 1, 1996
This article reports a laboratory study of swine manure decomposition in a deep pit. Distributions of solids, organic matter, pH, and ammonia in fresh swine manure after 12 h settling in a 1.2 m...
Effects of frequency and quantity of sprinkling canola oil on dust reduction in swine buildings
January 1, 1996
Dust concentrations in animal buildings can be reduced by sprinkling a small quantity of canola (rapeseed) oil on the floor. The efficiency of dust reduction was expected to be dependent on the...
Methane emissions from an anaerobic swine lagoon
January 1, 1996By R. R. Sharpe
Gaseous methane (CH4) emissions from a swine waste holding lagoon were determined periodically during the year. Micrometeorological techniques were used in order that emission rates from the lagoon...
Forage characteristics, steer performance, and water quality from bermudagrass pastures fertilized with two levels of nitrogen from swine lagoon effluent
January 1, 1996
Four 0.8-ha pastures of bermudagrass (Cynodon dactylon [L.] Pers.) were fertilized with either 456 or 873 kg/ha of nitrogen (N) from swine lagoon effluent (two replicates per treatment) and grazed by...
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...
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...
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...
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...
A Simple Design and Operation for the Anaerobic Treatment of Highly Concentrated Swine Waste in the Tropics
January 1, 1995By P. Y. Yang
In order to develop a simple operation for an anaerobic treatment process for highly concentrated pig wastewater for small producers, a three-stage anaerobic treatment process was investigated. The...
Environment - Water Usage / Conservation
A method to evaluate appropriate nipple drinker flow rates for pigs
January 1, 1995By Peter A. Phillips
A method was developed for measuring how different water flow rates from nipple drinkers affect the actual rates of water intake and spillage by pigs. A combination of video and electronic techniques...
