Soil microbial community composition and structure: residual effects of contrasting N fertilization of swine lagoon effluent versus ammonium nitrate
January 1, 2007By K. Iyyemperumal and W. Shi
Land application of swine lagoon effluent (SLE) often changes soil pH and the concentrations of nutrients and trace metals. We hypothesize that fertilization-associated alteration in soil properties...
Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure
January 1, 2007By Buchanan
Precipitation of phosphate minerals from liquid swine manure is an established means of
reducing the orthophosphate (OP) concentration. This project investigated the usefulness
of a chemical...
Effect of potassium inhibition on the thermophilic anaerobic digestion of swine waste
January 1, 2007By Chen
The inhibition effects of high potassium concentration on thermophilic anaerobic digestion of swine waste were studied. A continuous stirred tank reactor (CSTR), operated at a hydraulic retention...
Empirical analysis and prediction of nitrate loading and crop yield for corn-soybean rotations
January 1, 2007By Malone
Nitrate nitrogen losses through subsurface drainage and crop yield are determined by multiple climatic and management variables. The combined and interactive effects of these variables, however, are...
Nitrogen balance and accumulation pattern in three contrasting prairie soils receiving repeated applications of liquid swine and solid cattle manure
January 1, 2007By C. Stumborg & J. J. Schoenau
The expansion of intensive livestock operations in western Canada has increased concerns about overloading of nutrients in manured lands. The magnitude of nutrient accumulation and its distribution...
Nutrient concentrations of runoff during the year following manure application
January 1, 2007By John E. Gilley
Little information is currently available concerning temporal changes in nutrient transport following the addition of manure to cropland areas. This study was conducted to measure nutrient transport...
The effect of feeding low-phytate barley-soybean meal diets differing in protein content to growing pigs on the excretion of phosphorus and nitrogen
January 1, 2007By J. K. Htoo
An experiment was conducted with growing pigs to determine the excretion of P and N in 4 barley-based diets formulated to contain 18 or 15% CP by using a normal barley (NB) or a low-phytate barley...
Tile water quality following liquid swine manure application into standing corn
January 1, 2007By B. R. Ball
The quality of water draining fields fertilized with liquid swine (Sus scrofa) manure (LSM) sidedressed into standing corn (Zea mays L.) at rates ranging from 0 to 94 m(3) ha(-1), either topdressed...
Impacts of waste from concentrated animal feeding operations on water quality
January 1, 2007By P.S. Thorne
Waste from agricultural livestock operations has been a long-standing concern with respect to contamination of water resources, particularly in terms of nutrient pollution. However, the recent growth...
Nitrification monitoring in a biofilter treating pig manure
January 1, 2007
BACKGROUND: Nitrogen removal by organic biofilters treating pig manure is incomplete and has to be optimized. This could be achieved by promoting the activity of denitrifiers, this being the limiting...
Compositional and functional features of humic acids from organic amendments and amended soils in Minnesota, USA
January 1, 2007
The use of organic amendments requires an adequate control of the chemical quality of their humic acid (HA)-like fractions and of the effects that these materials may have on the status, quality,...
Use of 13C abundance to study short-term pig slurry decomposition in the field
January 1, 2007
Applying pig slurry (PS) on agricultural soils is a common practice. However, its impact on soil organic C dynamics is not clear. This experiment investigated the use of natural 13C abundance to...
