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...
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...
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...
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...
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...
Retention of nitrogen and phosphorous from liquid swine and poultry manures using highly characterized peats
January 1, 2002
This paper reports on research designed to test the hypothesis that differences in peat composition will cause differences in amounts of N and P retained during contact with liquid swine manure (LSM)...
Stratification of solids, nitrogen and phosphorus in swine manure in deep pits under slatted floors
January 1, 2002
Manure slurries stored in pits under slatted floors of both finishing and nursery barns were sampled at four different depths to study stratifications of total solids (TS) and nutrients (nitrogen and...
Effects of temperature, soil water status, and soil type on swine slurry nitrogen transformations
January 1, 2002
Manure N dynamics are affected by manure characteristics, soil factors, and environmental conditions. An incubation experiment was conducted to assess the relationship of these factors. The effects...
Nutrient recovery from swine lagoon water by Spirodela punctata
January 1, 2002
Spirodela punctata 7776, the best duckweed strain in total protein production selected from in vitro screening experiments with synthetic swine lagoon water medium was examined for N and P recovery....
Precipitation of swine and cattle manure phosphorous using limestone dust
January 1, 2002
The effectiveness of SPS and PULPRO, fine limestone dusts, in precipitating swine and dairy manure phosphorous (P) was determined in the laboratory. Both manures were sieved before being treated with...
Swine Wastewater Treatment in an Integrated System of Anaerobic Digestion and Duckweed Nutrient Removal
January 1, 2002By J. Cheng
Organics destruction and nutrient uptake in an integrated pilot system of anaerobic digestion and duckweed nutrient removal for swine wastewater treatment were monitored under field conditions. Raw...
Summertime concentrations and emissions of hydrogen sulfide at a mechanically ventilated swine finishing building
January 1, 2002
Hydrogen sulfide (H2S) concentration and emission at a modern mechanically ventilated swine finishing building with a deep pit were continuously measured for three summer months. The building is...
