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...
Optimization of phosphorus precipitation from swine manure slurries to enhance recovery
January 1, 2003By Robert Burns
Laboratory experiments were conducted using magnesium chloride (MgCl2·6H2O, 64% solution) to force the precipitation of phosphorus and reduce the concentration of soluble phosphorus (PO4 3?) in two...
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...
Comparative investigation of sequentially extracted phosphorus fractions in a sandy loam soil and a swine manure
January 1, 2003By Z. He
Sequential fractionation is one of the most common methods used to investigate phosphorus (P) forms in soils. The strategy can be used for evaluating bioavailability of soil P and for investigating...
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...
Comparing ammonium ion dissociation constant in swine anaerobic lagoon liquid and deionized water
January 1, 2003By Jactone Arogo
The dissociation constant of ammonium ion both in deionized water and swine anaerobic lagoon liquid was determined experimentally in a convective emission chamber at three temperatures (15 degrees...
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...
Quantitation of estrogens in ground water and swine lagoon samples using solid-phase extraction, pentafluorobenzyl/trimethylsilyl derivatizations and gas chromatography-negative ion chemical ionization tandem mass spectrometry
January 1, 2003By Dennis D. Fine
A method was developed for the confirmed identification and quantitation of 17(beta)-estradiol, estrone, 17(alpha)-ethynylestradiol and 16(alpha)-hydroxy-17(beta)-estradiol (estriol) in ground water...
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...
Development of methods to measure dust (PM10) and ammonia emissions from Minnesota pig facilities
December 31, 2002By Larry D. Jacobson
The concentration and emission rate for ammonia, hydrogen sulfide, particulate matter or dust under 10 microns in diameter (PM10), and odor were measured in a representative deep-bedded hoop pig...
