A swine waste package biotreatment plant for the tropics
January 1, 1993By P. Y. Yang
Management of small pig waste/wastewater in the tropics is considered as a rather difficult problem, especially in the land limited and populated areas. In order to eliminate the problem or...
Application of nitrogen from swine lagoon effluent to bermudagrass pastures: seasonal changes in forage nitrogenous constituents and effects of energy and escape protein supplementation on beef cattle performance
January 1, 1993By R. W. Harvey
A 2-yr study was conducted to evaluate 1) the effects of nitrogen level from swine lagoon effluent on forage composition and animal performance and 2) the effects of supplemental escape protein (EP)...
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...
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...
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...
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...
