Journal of Environmental Quality

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Biochar Incorporation into Pasture Soil Suppresses in situ Nitrous Oxide Emissions from Ruminant Urine Patches
Journal of Environmental Quality - Tập 40 Số 2 - Trang 468-476 - 2011
Arezoo Taghizadeh‐Toosi, Timothy J. Clough, Leo M. Condron, Robert R. Sherlock, Craig Anderson, Robin A. Craigie
Nitrous oxide (N2O) emissions from grazing animal excreta are estimated to be responsible for 1.5 Tg of the total 6.7 Tg of anthropogenic N2O emissions. This study was conducted to determine the in situ effect of incorporating biochar, into soil, on N2O emissions from bovine urine patches and associated pasture uptake of N. The...... hiện toàn bộ
Biochar and the Nitrogen Cycle: Introduction
Journal 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
Wetland and Stream Buffer Size Requirements—A Review
Journal of Environmental Quality - Tập 23 Số 5 - Trang 878-882 - 1994
Andrew J. Castelle, A. W. Johnson, Catherine Conolly
Relating Soil Phosphorus to Dissolved Phosphorus in Runoff: A Single Extraction Coefficient for Water Quality Modeling
Journal 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
A Simple Numerical Model for Predicting Organic Matter Decomposition in a Fed‐Batch Composting Operation
Journal of Environmental Quality - Tập 31 Số 3 - Trang 997-1003 - 2002
Kiyohiko Nakasaki, Akihito Ohtaki
ABSTRACTUsing dog food as a model of the organic waste that comprises composting raw material, the degradation pattern of organic materials was examined by continuously measuring the quantity of CO2 evolved during the composting process in both batch and fed‐batch operations. A simple numerical model was made on the basis of three suppositions ...... hiện toàn bộ
Immobilization of Nickel and Other Metals in Contaminated Sediments by Hydroxyapatite Addition
Journal 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
A Proposal for Estimation of Soil Leaching and Leaching Constants for Use in Assessment Models
Journal of Environmental Quality - Tập 12 Số 1 - Trang 17-28 - 1983
C.F. Baes, R.D. Sharp
AbstractA model to predict annual‐average, order‐of‐magnitude leaching constants for solutes in agricultural soils is given. The leaching constants, specific by geographic location and solute, are for use in exposure, dose, or risk assessment models to account for removal from the root zone via leaching in a manner analogous to radiological decay. The model present...... hiện toàn bộ
Phosphorus Speciation of Sequential Extracts of Organic Amendments Using Nuclear Magnetic Resonance and X‐ray Absorption Near‐Edge Structure Spectroscopies
Journal of Environmental Quality - Tập 36 Số 6 - Trang 1563-1576 - 2007
Babasola Ajiboye, O. O. Akinremi, Yongfeng Hu, Donald N. Flaten
AbstractThe chemical forms of phosphorus in organic amendments are essential variables for proper management of these amendments for agro‐environmental purposes. This study was performed to elucidate the forms of phosphorus in various organic amendments using state‐of‐the‐art spectroscopic techniques. Anaerobically digested biosolids (BIO), hog (HOG), dairy (DAIRY)...... hiện toàn bộ
Speciation of Phosphorus in Phosphorus‐Enriched Agricultural Soils Using X‐Ray Absorption Near‐Edge Structure Spectroscopy and Chemical Fractionation
Journal of Environmental Quality - Tập 32 Số 5 - Trang 1809-1819 - 2003
Suzanne Beauchemin, Dean Hesterberg, J.-H Chou, Mario Beauchemin, R. R. Simard, D. E. Sayers
ABSTRACTKnowledge of phosphorus (P) species in P‐rich soils is useful for assessing P mobility and potential transfer to ground water and surface waters. Soil P was studied using synchrotron X‐ray absorption near‐edge structure (XANES) spectroscopy (a nondestructive chemical‐speciation technique) and sequential chemical fractionation. The objective was to determine...... hiện toàn bộ
Runoff of Sulfometuron‐Methyl and Cyanazine from Small Plots: Effects of Formulation and Grass Cover
Journal 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
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