Water contamination by ammonium nitrogen following the spreading of hog manure and mineral fertilizers
January 1, 1989By A. R. Pesant
Inappropriate fertilization practices in regions where livestock manure exceeds crop requirements may cause pollution by NH4+-N) during snowmelt. Annual and seasonal NH4+-N losses were evaluated for...
Seepage and electromagnetic terrain conductivity around new swine lagoons
January 1, 1989By Rodney L. Huffman
Three swine lagoons in North Carolina's coastal region are monitored with electromagnetic terrain conductivity (EM) surveys and wells. One lagoon, in Norfold series clay soil, shows no significant...
Long-term effects of liquid hog manure on the phosphorus status of a silt loam cropped to corn
January 1, 1989By I. Royer
Repeated application of animal manure or mineral P fertilizer can significantly increase soil P content and enhance the risk of water contamination. The objectives of this study were to evaluate the...
Use of biofilters in odor control
January 1, 1988
Use of a peat-based biofilter to reduce odour emissions from pig manure is discussed. At an air flow of 540 msuperscript 3/h, a 5.8 msuperscript 3 pilot biofilter absorbed 554 g of NH3 per day,...
Performance of a continuous belt microscreening unit for solid liquid separation of swine waste
January 1, 1988By L. Fernandes
A new mechanical device for the pretreatment of animal waste was developed to separate pig waste into solid and liquid fractions using an endless belt made of filter material and continuously cleaned...
Evaluation of a swine manure odor control additive
May 21, 1987
A 12 week dynamic experiment was conducted on a commercial manure additive. Manure was collected daily from finishing pigs and added to barrels. Odors were analyzed by human sniffers and detector...
Dust and bacteria removal equipment for controlling particulates in swine buildings
January 1, 1987
The potential of air ionization to control dust and bacteria in livestock buildings was investigated, using a special chamber within an animal chamber. Insulation panels with exposed aluminium foil...
Copper and zinc accumulation, profile distribution, and crop removal in coastal plain soils receiving long-term, intensive applications of swine manure
January 1, 1987By Jeffrey M. Novak
Trace metals like copper (Cu) and zinc (Zn) are added to animal feed as dietary supplements, and trace metals not assimilated by the animals gut are excreted in manure. The accumulation and movement...
Model to predict gaseous contaminants in swine confinement buildings
January 1, 1987
A brief review is given of the physiological effects of carbon dioxide, methane, ammonia and hydrogen sulphide on pigs. Manure composition is discussed in terms of broad chemical classes such as...
Characteristics of aerial dust in swine finishing houses
January 1, 1986
Aerial dust from 11 commercial pig finishing houses, 4 with mechanical and 7 with natural ventilation, was sampled during an 8-month period. Mass concentrations of up to 38 mg/m3 were correlated with...
