A system for manure treatment and phosphorous control on small dairy and swine farms
January 1, 2004By Victor Johnson
Focus on animal waste treatment for odor and phosphorus control has small farmers in a quandary. Sophisticated systems for manure dewatering and treatment involving centrifuges, screw presses, belt...
Nutrition and feed management strategies to reduce nutrient excretions and odors from swine manure
January 1, 2004By A. L. Sutton
Manipulation of the pig's diet to reduce nutrient excretions and odors is feasible and practical. Avoiding excessive dietary protein, using high quality protein sources, and feeding low protein,...
Yield and nutrient export of grain corn fertilized with raw and treated liquid swine manure
January 1, 2004By M.H. Chantigny
Treatment of liquid swine manure (LSM) is an option to improve nutrient management. Mineral fertilizer, raw LSM, and LSM treated by anaerobic digestion, flocculation, filtration, or natural...
Conversion of Hog Manure to Diesel Fuel
January 1, 2004By Alfred Tiller
The process defined in objective one above needs further elucidation to
clarify any misunderstandings that might occur. During the past few years we
discovered that ag-waste, particularly animal...
Soil Column Testing for Nutrient Reduction in Partially Treated Swine Manure
January 1, 2004By Jian Xiao
Liquid swine manure, pre-treated by physical and chemical methods to precipitate phosphorus and remove suspended solids, was applied to a series of soil columns. The soil columns simulated proposed...
Total and water-soluble phosphorus excretion from swine fed low-phytate soybeans
January 1, 2004
A study was conducted to evaluate the impact of feeding soybean meal (SBM) from low-phytate (LP) or traditional phytate (TP) soybeans on performance and excretions from growing swine. Ninety-six...
Seepage evaluation of older swine lagoons in North Carolina
January 1, 2004By Ronald L. Huffman
Thirty-four swine waste lagoon systems in North Carolina were examined for evidence of seepage losses to the shallow groundwater. All were constructed prior to the state's January 1993 adoption of...
Enzyme-linked immunosorbent assay for ultratrace determination of antibiotics in aqueous samples
January 1, 2004By K. Kumar
Two commercially available enzyme-linked immunosorbent assay (ELISA) kits that are commonly used for tylosin or tetracycline residues in meat and milk were adapted for ultratrace analysis of these...
Enzymatic hydrolysis of organic phosphorus in swine manure and soil
January 1, 2004By Zhongqi He
Organic phosphorus (Po) exists in many chemical forms that differ in their susceptibility to hydrolysis and, therefore, bioavailability to plants and microorganisms. Identification and quantification...
Reducing phosphorus runoff from swine manure with dietary phytase and aluminum chloride
January 1, 2004
Phosphorus (P) runoff from fields fertilized with swine (Sus scrofa) manure has been implicated in eutrophication. Dietary modification and manure amendments have been identified as best management...
An assessment of nitrogen-based manure application rates on 39 U.S. swine operations
January 1, 2004
Water quality concerns and revised regulations are changing how confined animal feeding operations manage manure. Devising acceptable and feasible changes in manure practices requires a full...
Use of floating vegetation to remove nutrients from swine lagoon wastewater
January 1, 2004
Methods are needed to remove nutrients contained within wastewater lagoons. Potential exists for nutrient removal directly from lagoons if vegetation can be grown on floating mats in the lagoon and...
