Challenges of managing liquid swine manure
January 1, 1993By Douglas L. Karlen
Liquid swine manure can be a resource for providing essential plant nutrients and building soil resources, but its management for maximum productivity with minimum environmental impact is often very...
Characterization of particles, ammonia and endotoxin in swine confinement operations
January 1, 1993
Total and respirable dust particles, ammonia and endotoxin were measured in the nursery and grower areas of 4 swine confinement houses during January-March and April-June. Increased ventilation in...
Denitrification from a swine lagoon overland flow treatment system at a pasture-riparian zone interface
January 1, 1993By Richard Lowrance
In manure disposal systems, denitrification is a major pathway for N loss and to reduce N transport to surface and ground water. We measured denitrification and the changes in soil N pools in a...
Effects of liquid swine manure applications on NO3-N leaching losses to subsurface drainage water from loamy soils in Iowa
January 1, 1993By A. Bakhsh
Long-term applications of organic or inorganic sources of N to croplands can increase the leaching potential of nitrate-nitrogen (NO3-N) for soils underlain by subsurface drainage "tile"...
Nitrogen assimilation by riparian buffer systems receiving swine lagoon wastewater
January 1, 1993By Robert K. Hubbard
A three-year study was conducted to determine the feasibility of using riparian buffer systems to assimilate nitrogen (N) from swine lagoon effluent. Replicated 30X4 m plots were established at the...
Simulating the effect of swine manure application on NO3-N transport to subsurface drainage water
January 1, 1993By Allah Bakhsh
The root zone water quality model (RZWQM V.3.25) was calibrated and evaluated using four years (1993-96) of field data to simulate the effect of swine manure application on NO3-N losses with...
Nutrient removal by grass components of vegetated buffer systems receiving swine lagoon effluent
January 1, 1993
Information is needed on nutrient removal mechanisms in vegetated buffer systems to assist in the design of these tong-term nutrient removal systems. We determined nutrient removal by grass portions...
Effects of swine lagoon effluent application on chemical properties of a loamy sand
January 1, 1992By F. Liu
In order to determine the effects of lagoon effluent application on soil chemical properties, swine lagoon effluent was applied to land with a 10% slope by an overland flow irrigation system on...
Performance of four constructed wetlands treating anaerobic swine lagoon effluents
January 1, 1992
Effluents from both cells of a two-cell anaerobic lagoon system beating flushed swine waste were loaded into two types of constructed wetlands [submerged flow (SF) and free water surface (FWS)]. The...
Nitrogen distribution in soils of constructed wetlands treating lagoon wastewater
January 1, 1992By Ariel A. Szögi
Constructed wetlands have the potential to be used for treatment of N-rich livestock wastewater. Our objectives were to evaluate both the time effect and increasing N loading rates on soil N...
