Biochar and the Nitrogen Cycle: IntroductionJournal of Environmental Quality - Tập 39 Số 4 - Trang 1218-1223 - 2010
Timothy J. Clough, Leo M. Condron
Nitrogen (N) is an essential nutrient, and research to date shows that biochar potentially has the ability to manipulate the rates of N cycling in soil systems by influencing nitrification rates and adsorption of ammonia and increasing NH4+ storage by enhancing cation exchange capacity in soils. Its influence on these processes may have further imp...... hiện toàn bộ
Relating Soil Phosphorus to Dissolved Phosphorus in Runoff: A Single Extraction Coefficient for Water Quality ModelingJournal of Environmental Quality - Tập 34 Số 2 - Trang 572-580 - 2005
Peter A. Vadas, Peter J. A. Kleinman, Andrew N. Sharpley, Benjamin L. Turner
ABSTRACTPhosphorus transport from agricultural soils contributes to eutrophication of fresh waters. Computer modeling can help identify agricultural areas with high potential P transport. Most models use a constant extraction coefficient (i.e., the slope of the linear regression between filterable reactive phosphorus [FRP] in runoff and soil P) to predict dissolved...... hiện toàn bộ
Immobilization of Nickel and Other Metals in Contaminated Sediments by Hydroxyapatite AdditionJournal of Environmental Quality - Tập 30 Số 2 - Trang 460-469 - 2001
John C. Seaman, J. Samuel Arey, Paul M. Bertsch
ABSTRACTBatch experiments were conducted to evaluate the ability of hydroxyapatite (HA) to reduce the solubility of metals, including the primary contaminants of concern, Ni and U, from contaminated sediments located on the Department of Energy's Savannah River Site, near Aiken, SC. Hydroxyapatite was added to the sediments at application rates of 0, 5, 15.8, and 5...... hiện toàn bộ
Runoff of Sulfometuron‐Methyl and Cyanazine from Small Plots: Effects of Formulation and Grass CoverJournal of Environmental Quality - Tập 19 Số 1 - Trang 119-125 - 1990
R. D. Wauchope, Randall Williams, L. R. Marti
AbstractTo determine the effects of application rates, grass cover, and formulation type on herbicide losses in runoff, we applied 4.5 kg/ha cyanazine (2‐[(4‐chloro‐6‐(ethylamino)‐1,3,5‐triazin‐2‐yl)] amino]‐2‐methylpropanenitrile) with 0.4 kg/ha sulfometuron‐methyl (methyl‐2[[[[(4,6‐dimethyl‐2‐pyrimidinyl)amino] carbonyl] amino] sulfonyl] benzoate) to 1.2 by 2.4 m...... hiện toàn bộ
Pesticide and Nutrient Movement into Subsurface Tile Drains on a Silt Loam Soil in IndianaJournal of Environmental Quality - Tập 20 Số 1 - Trang 264-270 - 1991
E. J. Kladivko, George E. Van Scoyoc, E. J. Monke, K. Oates, Wayne Pask
AbstractThe objectives of this study were to determine field‐scale pesticide and nutrient losses to subsurface tile drains over a 3‐yr period on a low organic matter and poorly structured silt loam soil under typical agricultural management practices. A subsurface drain spacing study was instrumented to measure drain discharge rates and to collect drainflow samples...... hiện toàn bộ
Evaluation of Biological Air Filters for Livestock Ventilation Air by Membrane Inlet Mass SpectrometryJournal of Environmental Quality - Tập 39 Số 3 - Trang 1085-1096 - 2010
Anders Feilberg, Anders Peter S. Adamsen, Sabine Lindholst, Merete Lyngbye, Annette Schäfer
Biological air filters have been proposed as a cost‐effective technology for reducing odor emissions from intensive swine production facilities. In this work we present results from the application of membrane inlet mass spectrometry (MIMS) for continuously monitoring the removal of odorous compounds in biological air filters. The sensitivity and selectivity were tested on synthetic sample...... hiện toàn bộ
Swine Odor Analyzed by Odor Panels and Chemical TechniquesJournal of Environmental Quality - Tập 40 Số 5 - Trang 1510-1520 - 2011
Steven Trabue, B. J. Kerr, Bradley L. Bearson, Cherie J. Ziemer
The National Research Council identified odors as a significant animal emission and highlighted the need to develop standardized protocols for sampling and analysis. The purpose of our study was to compare different odor sampling techniques for monitoring odors emitted from stored swine manure. In our study, odorous headspace air from swine manure holding tanks were analyzed by human panel...... hiện toàn bộ