Simulated N management effects on corn yield and tile-drainage nitrate loss
January 1, 2003
Thoroughly tested simulation models are needed to help quantify the long-term effects of agriculture. We evaluated the Root Zone Water Quality Model (RZWQM) response to different N management...
Energy requirements for transport and surface application of liquid pig manure in Manitoba, Canada
January 1, 2003By Canada R3T 2N2|M.J. Wiens Department of Plant Science|Manitoba|University of Manitoba|Winnipeg
The objective of this study was to conduct a thorough accounting of energy used to transport liquid pig manure from farm storage to the field and to surface-apply the manure. Energy consumption was...
Water quality improvements of wastewater from confined animal feeding operations after advanced treatment
January 1, 2003By Vanotti MB
Current trends of animal production concentration and new regulations promote the need for environmentally safe alternatives to land application of liquid manure. These technologies must be able to...
Transformations of soil and manure phosphorus after surface application of manure to field plots
January 1, 2003By P. A. Vadas (&) USDA-ARS|U.S. Dairy Forage Research Center
Transfer of phosphorus (P) from surface-applied manures to runoff is an important source of pollution, but few studies have closely monitored P dynamics in manure, soil, and runoff through time. We...
Management strategies to simultaneously reduce ammonia, nitrous oxide and odour emissions from surface-applied swine manure
January 1, 2003By Smith E.
Surface-applied swine manure has the potential to generate ammonia (NH3), nitrous oxide (N2O) and odour. Field research was conducted in Prince Edward Island to measure the simultaneous emissions of...
Fungal population levels in soils of commercial swine waste disposal sites and relationships to soil nutrient concentrations
January 1, 2003By R. Pratt U.S. Department of Agriculture
Commercial disposal of animal wastes by application to agricultural soils is well-known to increase soil nutrient concentrations and the potential for water pollution. Less is known of whether or how...
Precipitation of liquid swine manure phosphates using magnesium smelting by-products
January 1, 2003By and N. Ziadi|G. Be´ langer|G. Parent
Swine manure contains considerable amounts of total (P) and soluble phosphorus (PO4-P) which may increase the soil P content when applied in excess to crop requirements and, consequently, risk water...
Influence of aeration rate and liquid temperature on ammonia emission rate and manure degradation in batch aerobic treatment
January 1, 2003By JUN ZHU
The influence of aeration rates (26, 63, and 100 ug O2 g VS-1 min-1) at different temperatures (5°C, 15°C, and 25°C) on ammonia emission and breakdown of organic materials was studied using 15.3...
Limitations of Orthophosphates Removal from Swine Manure During Batch-Aerated Treatments
January 1, 2003By Pius M. Ndegwa
Previous studies on removal of orthophosphates (ortho-P) from swine manure during aeration treatments show performances ranging between 30 and 91%. This study investigated three factors believed to ...
Enhanced Phosphorous removal from swine-nursery manure in aerated batch reactors
January 1, 2003
Phosphorus-based land application of swine manure slurry results in under-application of nitrogen (N), while nitrogen-based application leads to over?application of phosphorus (P). Significant...
Evaluation of ammonia recovery waste treatment for swine urine
January 1, 2003
The United States Department of Agriculture (USDA) and Environmental Protection Agency (EPA) have identified ammonia loading in wastewaters associated with animal farming operations to be a general...
Quicklime Stabilization of Belt-separated Swine Manure Solids
January 1, 2003
Quicklime may be used to raise the pH of manure solids thus initiating a stabilizing effect of killing pathogens, reducing vector attraction, and controlling odors. A range of 5% to 15% quicklime...
