Antibiotic-resistant enterococci and fecal indicators in surface water and groundwater impacted by a concentrated swine feeding operation
January 1, 2002By A.R. Sapkota
BACKGROUND: The nontherapeutic use of antibiotics in swine feed can select for antibiotic resistance in swine enteric bacteria. Leaking swine waste storage pits and the land-application of swine...
Carbon, nutrient, and mass loss during composting
January 1, 2002By S.M. Tiquia
Hoop manure (a mixture of partially decomposed pig manure and cornstalks from swine fed in hoop structures) was the subject of a nitrogen mass balance during the feeding period. The manure was then...
Reduction of ammonia emissions from treated anaerobic swine lagoons
January 1, 2002By Ariel A. Szögi
There is a need for treatment technologies that can effectively address environmental concerns associated with manure in confined animal production, including accurate assessment of their...
Effects of stocking rate and crude protein intake during gestation on ground cover, soil-nitrate concentration, and sow and litter performance in an outdoor swine production system
January 1, 2002By J. J. McGlone
Pregnant gilts (n = 126) were assigned randomly to 12 0.4-ha old world-spar bluestem (Bothriochloa ischaemum) pastures in an outdoor swine (Sus scrofa) production system to examine effects of...
Influence of anaerobic pre-conditioning on phosphorus removal in swine manure by aeration
January 1, 2002By JUN ZHU
A feasibility study with three pre-conditioning times was carried out in Waseca, Minnesota, USA, to examine the effect of anaerobic pre-treatment on phosphorus removal by aeration. The results showed...
Dynamic simulation model of nitrogen fluxes in pig housing and outdoor storage facilities
January 1, 2002By P. Berthiaume
Many factors in pig production, including genetics, feeding efficiency, feed composition, feed distribution method, environmental control, and waste management, affect the nitrogen content of pig...
Removal of carbon, nitrogen, and phosphorus in pig manure by continuous and intermittent aeration at low redox potentials
January 1, 2002By JUN ZHU
A laboratory experiment was conducted to study the effect of intermittent and continuous aeration at an airflow rate of 0.0667 lmin-1 l-1 of manure on redox potential, pH, organic carbon, total...
Characterizing ammonia emissions from swine farms in eastern North Carolina: Part 2 – Potential environmentally superior technologies for waste treatment
January 1, 2002By Aneja
The need for developing environmentally superior and sustainable solutions for managing the animal waste at commercial swine farms in eastern North Carolina has been recognized in recent years....
Phosphorus stratification and potential for runoff loss following long term manure application
January 1, 2002By Martha Mamo
Understanding phosphorus (P) accumulation and stratification in surface soil following manure application is critical for runoff P loss abatement. The objectives of this study were to predict soil P...
Emissions of ammonia, hydrogen sulfide, and odor before, during, and after slurry removal from a deep-pit swine finisher
January 1, 2002
It is a common practice in the midwestern United States to raise swine in buildings with under-floor slurry storage systems designed to store manure for up to one year. These so-called...
