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"...
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...
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...
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...
Surface application of liquid swine manure: Chemical variability
January 1, 1992By Michael E. Essington
The determination of manure loading rates for crop production is complicated by the temporal variability in manure nutrient concentrations and the difficulty in obtaining representative samples on...
Aeration Experiments for Swine Waste Composting
January 1, 1992
A study was undertaken to investigate aeration in the composting of swine manure. Three sets of aeration experiments were conducted to determine the optimum aeration rate. Both continuous and...
Effectiveness of Vegetative Filter Strips in Retaining Surface-Applied Swine Manure Constituents
January 1, 1992By Indrajeet Chaubey
Simulated rainfall was used to evaluate the effectiveness of vegetative filter strips (VFS) of varying lengths (0, 3, 6, 9, 15, and 21 m) in reducing sediment and nutrient losses from plots treated...
Surface water quality impacts of tillage practices under liquid swine manure application
January 1, 1992By R. P. Rudra
Field studies were conducted to investigate the effects of tillage practices on the saturated hydraulic conductivity, and quantity and quality of surface runoff water resulting from the application...
Evaluation of overland flow treatment for swine lagoon effluent
January 1, 1992By Gary L. Hawkins
Overland flow, on slopes of 5 and 11%, was used as a means of treating wastewater effluent from the second cell of a swine waste anaerobic lagoon system. Wastewater samples from both surface runoff...
Swine manure and N-management systems: impact on groundwater quality
January 1, 1992By R. S. Kanwar
Field studies were initiated in the fall of 1992, to evaluate the effects of nine alternative nitrogen (N), tillage, and crop management strategies on N loss to the shallow groundwater. The tillage...
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...
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...
