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
Spatial and Seasonal Variations of the Air Pollution Index and a Driving Factors Analysis in China
Journal of Environmental Quality - Tập 43 Số 6 - Trang 1853-1863 - 2014
Hongjuan Jiang, Hairong Li, Linsheng Yang, Yonghua Li, Sheng Wang, Ya-chen Yan
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
Measurement of Trace Gas Fluxes over an Unfertilized Agricultural Field Using the Flux‐gradient Technique
Journal of Environmental Quality - Tập 40 Số 5 - Trang 1359-1365 - 2011
LaToya Myles, John Kochendorfer, Mark Heuer, Tilden P. Meyers
Trace gas fluxes exhibit extensive spatial and temporal variability that is dependent on a number of factors, including meteorology, ambient concentration, and emission source size. Previous studies have found that agricultural fertilization contributes to higher fluxes of certain gases. The magnitude of trace gas fluxes over unfertilized crops is still uncertain. In the present study, dep...... hiện toàn bộ
Radionuclide Transport above a Near‐Surface Water Table: III. Soil Migration and Crop Uptake of Three Gamma‐Emitting Radionuclides, 1990 to 1993
Journal of Environmental Quality - Tập 30 Số 4 - Trang 1341-1353 - 2001
P. Wadey, G. Shaw, J.N.B. Bell
ABSTRACTThis paper summarizes the vertical distributions of 22Na, 137Cs, and 60Co above controlled water tables in deep and shallow lysimeters during a four‐year experiment. The activity concentration profiles were all determined at the time of harvest of a winter wheat (Triticum aestivum... hiện toàn bộ
Radionuclide Transport Above a Near‐Surface Water Table: IV. Soil Migration and Crop Uptake of Chlorine‐36 and Technetium‐99, 1990 to 1993
Journal of Environmental Quality - Tập 33 Số 6 - Trang 2272-2280 - 2004
G. Shaw, P. Wadey, J.N.B. Bell
ABSTRACTVertical distributions of 36Cl and 99Tc are presented from deep and shallow lysimeters above artificially controlled water tables for a 4‐yr experiment from 1990 to 1993. Activity concentration profiles were all measured in late summer when a winter wheat (Triticum aestivum L. cv. Pastiche...... hiện toàn bộ
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