Effect of sampling frequency on estimates of cumulative nitrous oxide emissions.

abstract：:The widespread use of chromium (Cr) has a deleterious impact on the environment. A number of pathways, both biotic and abiotic in character, determine the fate and speciation of Cr in soils. Chromium exists in two predominant species in the environment: trivalent [(Cr(III)] and hexavalent [Cr(VI)]. Of these two forms,...

journal_title：Journal of environmental quality

authors： Choppala GK,Bolan NS,Megharaj M,Chen Z,Naidu R

更新日期：2012-07-01 00:00:00

abstract：:Protection of ground water for present and future use requires monitoring and understanding of the mechanisms controlling long-term quality of ground water. In this study, spatial and temporal trends in concentrations of nitrate and pesticides in ground water in the eastern San Joaquin Valley, California, were evaluat...

journal_title：Journal of environmental quality

authors： Burow KR,Shelton JL,Dubrovsky NM

更新日期：2008-09-01 00:00:00

abstract：:We investigated the seasonal patterns of denitrification rates and potentials in soil profiles along the topohydrosequence formed at the upland-wetland interface in three riparian wetlands with different vegetation cover (i.e., forest, understory vegetation, and grass). Denitrification was measured using the acetylene...

journal_title：Journal of environmental quality

authors： Clément JC,Pinay G,Marmonier P

更新日期：2002-05-01 00:00:00

abstract：:Knowledge of pesticide distribution and persistence in nursery recycling pond water and sediment is critical for preventing phytotoxicity of pesticides during water reuse and to assess their impacts to the environment. In this study, sorption and degradation of four commonly used pesticides (diazinon, chlorpyrifos, ch...

journal_title：Journal of environmental quality

authors： Lu J,Wu L,Newman J,Faber B,Merhaut DJ,Gan J

更新日期：2006-08-09 00:00:00

abstract：:Laboratory microcosm experiments were used to assess the effects of environmental parameters on the persistence of the Bacteroides 16S rRNA genes derived from equine fecal samples in stream water to investigate the utility of Bacteroides spp. as fecal indicator organisms. Quantitative real-time polymerase chain reacti...

journal_title：Journal of environmental quality

authors： Bell A,Layton AC,McKay L,Williams D,Gentry R,Sayler GS

更新日期：2009-04-27 00:00:00

abstract：:Constructed wetland treatment systems are used to remove selenium (Se) from flue-gas desulfurization (FGD) wastewater (WW). However, direct confirmation of the mechanism responsible for FGD WW Se retention in soil is lacking. A laboratory-based soil column study was performed to develop an evidence-based mechanism of ...

journal_title：Journal of environmental quality

authors： Galkaduwa MB,Hettiarachchi GM,Kluitenberg GJ,Hutchinson SL,Davis L,Erickson LE

更新日期：2017-03-01 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：:Conservation tillage practices have become increasingly common in recent years to reduce soil erosion, improve water conservation, and increase soil organic matter. Research suggests that conservation tillage can stratify soil test phosphorus (P), but little is known about the effects on soil organic P. This study was...

journal_title：Journal of environmental quality

authors： Abdi D,Cade-Menun BJ,Ziadi N,Parent LÉ

更新日期：2014-07-01 00:00:00

abstract：:Passage of agricultural runoff through vegetated drainage ditches has been shown to reduce the amount of pesticides, such as atrazine, exiting out of agricultural watersheds. Previous studies have found that microbial communities in soil from fields treated with atrazine display enhanced rates of atrazine degradation....

journal_title：Journal of environmental quality

authors： Tyler HL,Khalid S,Jackson CR,Moore MT

更新日期：2013-05-01 00:00:00

abstract：:Vertical distributions of (36)Cl and (99)Tc 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) crop was harvested. Aft...

journal_title：Journal of environmental quality

authors： Shaw G,Wadey P,Bell JN

更新日期：2004-11-01 00:00:00

abstract：:An 8-yr field-scale study, 2005 to 2012, investigated effects of agricultural land use on nutrient and sediment losses during snowmelt runoff from four treatment fields in southern Manitoba. In 2005, two fields with a long-term history of annual crop (AC) production were planted to perennial forage (PF), while two oth...

journal_title：Journal of environmental quality

authors： Liu K,Elliott JA,Lobb DA,Flaten DN,Yarotski J

更新日期：2014-09-01 00:00:00

abstract：:Phosphorus (P) losses from nonpoint sources into surface water resources through surface runoff and tile drainage play a significant role in eutrophication. Accordingly, the number of studies involving the modeling of agricultural P losses, the uncertainties of such models, and the best management practices (BMPs) sup...

journal_title：Journal of environmental quality

authors： Wang Z,Zhang T,Tan CS,Qi Z

更新日期：2020-09-01 00:00:00

abstract：:Field-scale relationships between soil test phosphorus (STP) and flow-weighted mean concentrations (FWMCs) of dissolved reactive phosphorus (DRP) and total phosphorus (TP) in runoff are essential for modeling phosphorus losses, but are lacking. The objectives of this study were (i) to determine the relationships betwe...

journal_title：Journal of environmental quality

authors： Little JL,Nolan SC,Casson JP,Olson BM

更新日期：2007-07-17 00:00:00

abstract：:Contamination of unfenced streams with P, sediments, and pathogenic bacteria from cattle (Bos taurus) activity may be affected by the availability of shade and alternative water sources. The objectives of this study were to evaluate water quality in two streams draining tall fescue (Festuca arundinacea Schreb.)-common...

journal_title：Journal of environmental quality

authors： Byers HL,Cabrera ML,Matthews MK,Franklin DH,Andrae JG,Radcliffe DE,McCann MA,Kuykendall HA,Hoveland CS,Calvert VH 2nd

更新日期：2005-11-07 00:00:00

abstract：:Groundwater contamination from NO-N leaching in corn ( L.) production with coarse-textured soils poses an environmental concern. Our objectives were to evaluate NO-N leaching in continuous corn (CC), corn after soybean ( L.) (CSb), and soybean after corn (SbC) in irrigated sandy soils in Minnesota related to (i) N rat...

journal_title：Journal of environmental quality

authors： Struffert AM,Rubin JC,Fernández FG,Lamb JA

更新日期：2016-09-01 00:00:00

abstract：:Increased phosphorus (P) availability under flooded, anaerobic conditions may accelerate P loss from soils to water bodies. Existing knowledge on P release to floodwater from flooded soils is limited to summer conditions and/or room temperatures. Spring snowmelt runoff, which occurs under cold temperatures with freque...

journal_title：Journal of environmental quality

authors： Kumaragamage D,Concepcion A,Gregory C,Goltz D,Indraratne S,Amarawansha G

更新日期：2020-05-01 00:00:00

abstract：:Pesticides are responsible for nearly 1900 water quality impairments in the United States. Impacts of pesticide runoff on aquatic ecosystems can be mitigated by implementing management practices such as constructed wetlands, grass buffers, and vegetated ditches. A new practice currently being examined is the use of ri...

journal_title：Journal of environmental quality

authors： Moore MT,Locke MA,Cullum RF

更新日期：2018-11-01 00:00:00

abstract：:Scaling in situ soil water content time series data to a large spatial domain is a key element of watershed environmental monitoring and modeling. The primary method of estimating and monitoring large-scale soil water content distributions is via in situ networks. It is critical to establish the stability of in situ n...

journal_title：Journal of environmental quality

authors： Cosh MH,Starks PJ,Guzman JA,Moriasi DN

更新日期：2014-07-01 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：:Isotopically exchangeable metals in soil, also termed labile metals, are reversibly bound to soil surface and are a better index of the environmental risk of the metals than are their total concentrations. In this study, labile fractions of potentially toxic elements were surveyed in metal mining-impacted soils of Mex...

journal_title：Journal of environmental quality

authors： Guzman-Rangel G,Martínez-Villegas N,Smolders E

更新日期：2020-03-01 00:00:00

abstract：:Conversions of Mollisols from prairie to cropland and subsequent changes in crop production practices in the Midwestern USA have resulted in changes in soil organic matter. Few studies have used archived samples, long-term resampling of soils to a depth of 1 m, and space for time studies to document these changes. We ...

journal_title：Journal of environmental quality

authors： David MB,McIsaac GF,Darmody RG,Omonode RA

更新日期：2009-01-13 00:00:00

abstract：:Pig (Sus scrofa domesticus) slurry (PS) is commonly applied as fertilizer to agricultural fields. Knowledge of PS nitrogen content is essential for good management, but PS nitrogen content is highly variable, not only between farms but also within a farm. Laboratory analysis of animal slurries is often expensive and i...

journal_title：Journal of environmental quality

authors： Yagüe MR,Quílez D

更新日期：2012-05-01 00:00:00

abstract：:Terbuthylazine (TA) is a herbicide that has been introduced for weed control in corn cultivations as a direct replacement for atrazine. Because incorporation of different organic amendments (OAs) is a common practice in this crop, this study investigated the effects of different OAs, including urban sewage sludge, pou...

journal_title：Journal of environmental quality

authors： Dolaptsoglou C,Karpouzas DG,Menkissoglu-Spiroudi U,Eleftherohorinos I,Voudrias EA

更新日期：2009-02-25 00:00:00

abstract：:Denitrifying bioreactors (DNBRs) harness the natural capacity of microorganisms to convert bioavailable nitrogen (N) into inert nitrogen gas (N) by providing a suitable anaerobic habitat and an organic carbon energy source. Woodchip systems are reported to remove 2 to 22 g N m d, but the potential to enhance denitrifi...

journal_title：Journal of environmental quality

authors： Bock EM,Coleman B,Easton ZM

更新日期：2016-05-01 00:00:00

abstract：:The increase in endocrine-disrupting compounds in the environment has generated research focused on the behavior of these compounds in natural soil and water ecosystems. To understand how estrogens behave in the soil environment as a result of 25+ yr of wastewater irrigation, soils from Penn State's "Living Filter" wa...

journal_title：Journal of environmental quality

authors： Woodward EE,Andrews DM,Williams CF,Watson JE

更新日期：2014-11-01 00:00:00

abstract：:The state of Iowa requires developing total maximum daily loads (TMDLs) for over 400 water bodies that are listed on the 303(d) list of the impaired waters. The Raccoon River watershed, which covers approximately 9400 km2 of prime agriculture land and represents a typical Midwestern corn-belt region in west-central Io...

journal_title：Journal of environmental quality

authors： Manoj K,Wolter CF,Schilling KE,Gassman PW

更新日期：2010-07-01 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：:Environmental regulations on greenhouse gas (GHG) emissions from corn (Zea mays L.)-ethanol production require accurate assessment methods to determine emissions savings from coproducts that are fed to livestock. We investigated current use of coproducts in livestock diets and estimated the magnitude and variability i...

journal_title：Journal of environmental quality

authors： Bremer VR,Liska AJ,Klopfenstein TJ,Erickson GE,Yang HS,Walters DT,Cassman KG

更新日期：2010-02-19 00:00:00

abstract：:Nitrate lost from agricultural soils is an economic cost to producers, an environmental concern when it enters rivers and lakes, and a health risk when it enters wells and aquifers used for drinking water. Planting a winter wheat cover crop (CC) and/or use of controlled tile drainage-subirrigation (CDS) may reduce los...

journal_title：Journal of environmental quality

authors： Drury CF,Tan CS,Welacky TW,Reynolds WD,Zhang TQ,Oloya TO,McLaughlin NB,Gaynor JD

更新日期：2014-03-01 00:00:00

abstract：:Trace elements (TEs) are universally present in environmental media, including soil, but agriculture uses some materials that have increased TE concentrations. Some TEs (e.g., Cu, Se, and Zn) are added to animal feeds to ensure animal health. Similarly, TEs are present in micronutrient fertilizers. In the case of phos...

journal_title：Journal of environmental quality

authors： Sheppard SC,Grant CA,Sheppard MI,de Jong R,Long J

更新日期：2009-03-25 00:00:00