Possible sources of nitrate in ground water at swine licensed-managed feeding operations in Oklahoma, 2001
January 1, 1999
Samples collected and analyzed by the Oklahoma Department of Agriculture, Food, and Forestry from 1999 to 2001 determined that nitrate exceeded the U.S. Environmental Protection Agency maximum...
Nitrogen Recovery and Partitioning with Different Rates and Methods of Sidedressed Manure
January 1, 1999
Animal manure is an important source of N for crops in areas with intensive livestock production. Variable manure N availability can incite over-application of manure or supplemental fertilizer...
Ammonia volatilization trends following liquid hog manure application to forage land
January 1, 1999By Brian D. Lambert
Recent changes in the livestock industry of western Canada have included the increased establishment of intensive hog operations in semiarid regions where the availability of cultivated land for...
Field evaluation of an indoor ozonation system for odor control
January 1, 1999By Kevin M. Keener
A commercial ozone generation system was evaluated in a tunnel ventilated, 1000 head, pig finishing building under full ventilation (80,000 c.f.m.). Ozone levels increased along the length of the...
Environment - Air
Development of a prefabricated treatment plant for diluted pig wastewater
January 1, 1999By P. Y. Yang
In order to develop a prefabricated treatment and reuse plant for diluted pig wastewater, an entrapped-mixed-microbial-cell (EMMC) process was evaluated for its process performance and economic...
Nitrate leaching as affected by liquid swine manure and cover cropping in sandy soil of southwestern Ontario
January 1, 1999By B. R. Ball-Coelho
To assess the risk that liquid swine manure (LSM) application posed to groundwater quality and determine how to manage excess nitrates, LSM pre-plant injected at 75% (LSMlow) and > 100% (LSMhigh) of...
Mass transfer coefficient of ammonia in liquid swine manure and aqueous solutions
January 1, 1999By J. Arogo
Correlations for the overall mass transfer coefficient of ammonia with liquid properties and environmental conditions were developed for ammonia volatilizing from aqueous solutions as well as from...
Solids and nutrient removal from flushed swine manure using polyacrylamides
January 1, 1999By Matias B. Vanotti
Most of the organic nutrients and reduced carbon (C) materials in liquid swine manure are contained in fine suspended particles that are not separated by available mechanical separators. Treatment...
A biomarker for the identification of swine fecal pollution in water, using the STII toxin gene from enterotoxigenic Escherichia coli
January 1, 1999
This research developed a PCR method to identify swine fecal pollution in water, using a portion of the STII toxin gene from enterotoxigenic Escherichia coli as the target sequence. This method...
Struvite precipitation in anaerobic swine lagoon liquid: effect of pH and Mg : P ratio and determination of rate constant
January 1, 1999By Nathan O. Nelson
Because of increased concern about surface water eutrophication from nutrient-enriched agricultural runoff, many swine producers are encouraged to decrease application rates of waste-based P....
Persistence of zoonotic pathogens in surface soil treated with different rates of liquid pig manure
January 1, 1999By Sagar M. Goyal
Zoonotic pathogens found in land-applied livestock manure may persist in the soil and be transported by runoff into surface waters, contributing to degradation of water quality. Manure management...
Mass transfer coefficient for hydrogen sulfide emission from aqueous solutions and liquid swine manure
January 1, 1999
The mass transfer coefficient for hydrogen sulfide emission from an aqueous solution and liquid manure into the air was determined using a convective emission chamber where air temperature, velocity,...
