When does nitrate become a risk for humans?

abstract：:While the US Midwest is expected to serve as a primary feedstock source for cellulosic biofuel production, the impacts of residue harvesting on soil organic carbon (SOC) may greatly limit sustainable production capacity. However, viable feedstock production could be realized through adoption of management practices an...

journal_title：Journal of environmental quality

authors： Jones CD,Oates LG,Robertson GP,Izaurralde RC

更新日期：2018-07-01 00:00:00

abstract：:Continued inputs of fertilizer and manure in excess of crop requirements have led to a build-up of soil phosphorus (P) levels and increased P runoff from agricultural soils. The objectives of this study were to determine the effects of two tillage practices (no-till and chisel plow) and a range of soil P levels on the...

journal_title：Journal of environmental quality

authors： Daverede IC,Kravchenko AN,Hoeft RG,Nafziger ED,Bullock DG,Warren JJ,Gonzini LC

更新日期：2003-07-01 00:00:00

abstract：:We have examined the persistence and movement of a urea-type herbicide, isoproturon [IPU; 3-(4-isopropylphenyl)-1,1'-dimethylurea], in soil using a novel herbicide-detection device, the prototype of a portable electrochemical biosensor based on Photosystem II particles immobilized on printed electrodes, and evaluated ...

journal_title：Journal of environmental quality

authors： Malý J,Klem K,Lukavská A,Masojídek J

更新日期：2005-09-08 00:00:00

abstract：:Atmospheric deposition samples were collected over 15 mo at several locations near an operating smelter and an abandoned Pb smelter to investigate the contribution of Pb smelting to depositional fluxes and potential local air quality degradation. Samples were analyzed for As, Cd, Cu, Pb, and Zn and subjected to scanni...

journal_title：Journal of environmental quality

authors： Xing W,Yang H,Ippolito JA,Zhao Q,Zhang Y,Scheckel KG,Li L

更新日期：2020-11-01 00:00:00

abstract：:When wetlands are disturbed by cattle, pulses of contaminants may be released. We studied nitrogen exports from a small pastoral wetland (1725 m) in the Lake Taupo Catchment, New Zealand, to which cattle and sheep had periodic access. Flow, turbidity, and water quality samples were collected at the wetland outlet over...

journal_title：Journal of environmental quality

authors： McKergow LA,Rutherford JC,Timpany GC

更新日期：2012-09-01 00:00:00

abstract：:Phytoextraction has the potential to remove heavy metals from contaminated soil, and chelants can be used to improve the capabilities of phytoextraction. However, environmentally persistent chelants can cause metal leaching and groundwater pollution. A column experiment was conducted to evaluate the viability of biode...

journal_title：Journal of environmental quality

authors： Zhao S,Jia L,Duo L

更新日期：2016-05-01 00:00:00

abstract：:Laboratory incubations of four broiler litter (BL) samples at 30°C were performed to investigate the effect of water content on the decay of uric acid nitrogen (UAN) and xanthine nitrogen (XN). UAN and XN concentrations increased in all samples during a period of 1 to 8 d before declining for the remaining 30 d. The i...

journal_title：Journal of environmental quality

authors： Mowrer J,Cabrera M,Rasmussen T,Cassity-Duffey K

更新日期：2014-11-01 00:00:00

abstract：:Mechanistic, predictive equations for phosphorus (P) transport in runoff from manure-applied fields constitute a critical knowledge gap for developing nonpoint-source pollution models. We derived two simple equations to describe the P release from animal manure during a rainfall event-one based on first-order P desorp...

journal_title：Journal of environmental quality

authors： Gérard-Marchant P,Walter MT,Steenhuis TS

更新日期：2005-04-20 00:00:00

abstract：:Managing biosolids from end-of-life municipal lagoons is a major challenge for many small communities where landfilling or spreading of biosolids on farmland is restricted. Contaminant removal via phytoextraction may be a viable remediation option for end-of-life lagoons in such communities. This study examined the ef...

journal_title：Journal of environmental quality

authors： Jeke N,Zvomuya F

更新日期：2018-11-01 00:00:00

abstract：:Pre-emergence herbicide residues were detected in domestic wells sampled near Tracy, CA. This study sought to determine the source of contamination by comparing soil distribution of diuron [N'-(3,4-dichlorophenyl)-N,N-dimethylurea] and hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione...

journal_title：Journal of environmental quality

authors： Prichard T,Troiano J,Marade J,Guo F,Canevari M

更新日期：2005-10-12 00:00:00

abstract：:In many regions, conservation tillage has replaced conventional tilling practices to reduce soil erosion, improve water conservation, and increase soil organic matter. However, tillage can have marked effects on soil properties, specifically nutrient redistribution or stratification in the soil profile. The objective ...

journal_title：Journal of environmental quality

authors： Cade-Menun BJ,Carter MR,James DC,Liu CW

更新日期：2010-09-01 00:00:00

abstract：:Terbuthylazine [N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazine-2,4-diamine] degradation pathways in agricultural soils were evaluated by following the appearance and mobility of its main transformation products: dealkylated and hydroxylated derivatives. Three experimental degradation studies in open field were perform...

journal_title：Journal of environmental quality

authors： Guzzella L,Rullo S,Pozzoni F,Giuliano G

更新日期：2003-05-01 00:00:00

abstract：:Decay rates are central parameters in modeling pesticide fate and transport in the environment. Pesticide decay is usually modeled as a first-order process, and variations in half-life can have significant impacts on model predictions. Decay rates for the foliage and thatch components of turf are scarce, and most simu...

journal_title：Journal of environmental quality

authors： Magri A,Haith DA

更新日期：2009-01-13 00:00:00

abstract：:Successful remediation of oil-contaminated agricultural land may include the goal of returning the land to prespill levels of agricultural productivity. This productivity may be measured by crop yield, quality, and safety, all of which are influenced by soil characteristics. This research was conducted to determine if...

journal_title：Journal of environmental quality

authors： O'Brien PL,DeSutter TM,Casey FXM,Wick AF,Khan E

更新日期：2017-07-01 00:00:00

abstract：:Loss of nitrate from agricultural lands to surface waters is an important issue, especially in areas that are extensively tile drained. To reduce these losses, a wide range of in-field and edge-of-field practices have been proposed, including constructed wetlands. We re-evaluated constructed wetlands established in 19...

journal_title：Journal of environmental quality

authors： Groh TA,Gentry LE,David MB

更新日期：2015-05-01 00:00:00

abstract：:An outdoor, solar illuminated growth chamber with modulated UV-B enhancement, is described and its performance characterized. The chamber was clad with Teflon film that transmitted both UV-A and UV-B with little absorption and whose transmission did not change significantly over 1 yr. An array of UV-B emitting fluor...

journal_title：Journal of environmental quality

authors： Ryan KG,Ireland W

更新日期：1997-05-01 00:00:00

abstract：:Declines in acidic deposition across Europe and North America have led to decreases in surface water acidity and signs of chemical recovery of soils from acidification. To better understand the link between recovery of soils and surface waters, chemical trends in precipitation, soils, and streamwater were investigated...

journal_title：Journal of environmental quality

authors： Siemion J,McHale MR,Lawrence GB,Burns DA,Antidormi M

更新日期：2018-05-01 00:00:00

abstract：:An important aspect for the evaluation of fire effects in slash-and-burn agricultural system, as well as in wildfire, is the soil burn severity. The objective of this study is to estimate the maximum temperature reached in real soil burn events using energy dispersive X-ray fluorescence (EDXRF) as an analytical tool, ...

journal_title：Journal of environmental quality

authors： Melquiades FL,Thomaz EL

更新日期：2016-05-01 00:00:00

abstract：:Consumption of microbially contaminated ground water can cause adverse health effects and the processes involved in pathogen transport in aquifers need to be understood. The influences of distance, flow velocity, and colloid size on colloid transport were examined in homogenous pea-gravel media using an 8-m column and...

journal_title：Journal of environmental quality

authors： Close ME,Pang L,Flintoft MJ,Sinton LW

更新日期：2006-07-06 00:00:00

abstract：:Adsorption-desorption of copper (Cu2+) at contaminated levels in two red soils was investigated. The red soil derived from the Quaternary red earths (clayey, kaolinitic thermic plinthite Aquult) (REQ) adsorbed more Cu2+ than the red soil developed on the Arenaceous rock (clayey, mixed siliceous thermic typic Dystrochr...

journal_title：Journal of environmental quality

authors： Yu S,He ZL,Huang CY,Chen GC,Calvert DV

更新日期：2002-07-01 00:00:00

abstract：:This study investigated the ability of a 10-yr-old constructed wetland to treat metal-contaminated leachate emanating from a coal ash pile at the Widows Creek electric utility, Alabama (USA). The two vegetated cells, which were dominated by cattail (Typha latifolia L.) and soft rush (Juncus effusus L.), were very effe...

journal_title：Journal of environmental quality

authors： Ye ZH,Whiting SN,Qian JH,Lytle CM,Lin ZQ,Terry N

更新日期：2001-09-01 00:00:00

abstract：:Maryland will impose restrictions on poultry litter application to soils with excessive P by the year 2005. Alternative uses for poultry litter are being considered, including burning as a fuel to generate electricity. The resulting ash contains high levels of total P, but the availability for crop uptake has not been...

journal_title：Journal of environmental quality

authors： Codling EE,Chaney RL,Sherwell J

更新日期：2002-05-01 00:00:00

abstract：:Growing nitrogen (N) catch crops can reduce NO(3)-N leaching after cultivating cereals. The objective of this study was to relate NO(3)-N leaching to variation in the uptake of N and the size and distribution of the root systems of different catch crops species. In a 3-yr lysimeter experiment, phacelia (Phacelia tanac...

journal_title：Journal of environmental quality

authors： Herrera JM,Feil B,Stamp P,Liedgens M

更新日期：2010-04-13 00:00:00

abstract：:This study compares two methods of dairy manure application-surface broadcast and shallow disk injection-on the fate and transport of natural estrogens in surface runoff from 12 field plots in central Pennsylvania. Ten natural surface runoff events were sampled over a 9-mo period after fall manure application. Results...

journal_title：Journal of environmental quality

authors： Mina O,Gall HE,Saporito LS,Kleinman PJ

更新日期：2016-11-01 00:00:00

abstract：:The occurrence of broad-host-range (BHR) plasmid amplicons belonging to incompatibility (Inc) groups IncA/C, IncN, IncP, and IncW in two wastewater treatment plant (WWTP) effluents and effluent-receiving streams in Northwest Arkansas, Mud Creek and Spring Creek, was determined. Community DNA captured on filter membran...

journal_title：Journal of environmental quality

authors： Akiyama T,Asfahl KL,Savin MC

更新日期：2010-11-01 00:00:00

abstract：:Subsurface tile drains in agricultural systems of the midwestern United States are a major contributor of nitrate-N (NO-N) loadings to hypoxic conditions in the Gulf of Mexico. Hydrologic and water quality models, such as the Soil and Water Assessment Tool, are widely used to simulate tile drainage systems. The Hoogho...

journal_title：Journal of environmental quality

authors： Moriasi DN,Gowda PH,Arnold JG,Mulla DJ,Ale S,Steiner JL,Tomer MD

更新日期：2013-11-01 00:00:00

abstract：:Poultry litter (PL) is a by-product of broiler production. Most PL is land applied. Land-applied PL is a valuable nutrient source for crop production but can also be a route of environmental contamination with manure-borne bacteria. The objective of this study was to characterize the fate of pathogens, fecal indicator...

journal_title：Journal of environmental quality

authors： Cook KL,Netthisinghe AM,Gilfillen RA

更新日期：2014-09-01 00:00:00

abstract：:A P index was developed as a tool to rank agricultural fields on the basis of P loss vulnerability, helping to target remedial P management options within watersheds. We evaluated two approaches, a soil P threshold and components of a P index, by comparing site vulnerability estimates derived from these two approaches...

journal_title：Journal of environmental quality

authors： Sharpley AN,McDowell RW,Weld JL,Kleinman PJ

更新日期：2001-11-01 00:00:00

abstract：:Gypsum has a long history as a soil amendment. Information on how flue gas desulfurization (FGD) gypsum affects soil, water, and plant properties across a range of climates and soils is lacking. We conducted a meta-analysis using data from 10 field sites in the United States (Alabama, Arkansas, Indiana, New Mexico, No...

journal_title：Journal of environmental quality

authors： Kost D,Ladwig KJ,Chen L,DeSutter TM,Espinoza L,Norton LD,Smeal D,Torbert HA,Watts DB,Wolkowski RP,Dick WA

更新日期：2018-09-01 00:00:00

abstract：:County-level agricultural statistics were aggregated at the watershed level to provide estimates of trends in land use and agricultural management in the Maumee and Sandusky River watersheds during the period 1975-1995. Average farm size increased by 40% or more, but the number of farms decreased by nearly 40%; the to...

journal_title：Journal of environmental quality

authors： Richards RP,Baker DB,Eckert DJ

更新日期：2002-01-01 00:00:00