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Volume 45 Issue 3, May-June 2016



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  • SPECIAL SECTION: MOVING DENITRIFYING BIOREACTORS BEYOND PROOF OF CONCEPT up

    • Laura E. Christianson and Louis A. Schipper
      Moving Denitrifying Bioreactors beyond Proof of Concept: Introduction to the Special Section
      Core Ideas
      • Research on denitrifying bioreactors has accelerated within the past 10 years.
      • Bioreactors are a demonstrated option for nitrate mitigation in appropriate contexts.
      • Bioreactors have now moved beyond the proof of concept.
      • Future research must think beyond the bioreactor “black box.”
      doi:10.2134/jeq2016.01.0013
      Journal of Environmental Quality 2016 45:757-761
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    • Emily M. Bock, Brady Coleman and Zachary M. Easton
      Effect of Biochar on Nitrate Removal in a Pilot-Scale Denitrifying Bioreactor
      Core Ideas
      • Novel biochar amendment to denitrifying bioreactor investigated on Delmarva Peninsula.
      • Biochar can enhance N removal in woodchip denitrifying bioreactors.
      • Biochar may also serve as a temporary N sink and mitigate the first flush.
      doi:10.2134/jeq2015.04.0179
      Journal of Environmental Quality 2016 45:762-771
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    • William T. Pluer, Larry D. Geohring, Tammo S. Steenhuis and M. Todd Walter
      Controls Influencing the Treatment of Excess Agricultural Nitrate with Denitrifying Bioreactors
      Core Ideas
      • Flow-through lab reactors show a linear increase in NOx removal with residence time.
      • Lab reactors show a linear increase in NOx removal at higher inflow NOx concentration.
      • Field reactors significantly reduce NOx outflow from tile-drained agriculture in NY.
      • Field reactor experiment results do not follow linear inflow NOx trend found in lab.
      • Biochar amendments show no significant removal of phosphorus in field reactors.
      doi:10.2134/jeq2015.06.0271
      Journal of Environmental Quality 2016 45:772-778
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    • Gary W. Feyereisen, Thomas B. Moorman, Laura E. Christianson, Rodney T. Venterea, Jeffrey A. Coulter and Ulrike W. Tschirner
      Performance of Agricultural Residue Media in Laboratory Denitrifying Bioreactors at Low Temperatures
      Core Ideas
      • A compartment of corn cobs before wood chips increases N removal and reduces C loss.
      • Microbial denitrifier populations for crop residues were higher than for wood chips.
      • Denitrification was limited by C availability at 1.5°C.
      • Nitrate-N removal does not necessarily correlate to N2O production.
      • N2O production per nitrate-N removed was nearly 4× at 1.5 compared with 15.5°C.
      doi:10.2134/jeq2015.07.0407
      Journal of Environmental Quality 2016 45:779-787
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    • Owen Fenton, Mark G. Healy, Fiona P. Brennan, Steven F. Thornton, Gary J. Lanigan and Tristan G. Ibrahim
      Holistic Evaluation of Field-Scale Denitrifying Bioreactors as a Basis to Improve Environmental Sustainability
      Core Ideas
      • Holistic assessment of pilot-scale denitrifying bioreactors highlighted pollution swapping.
      • A sustainability index across two scenarios identified net production or removal of pollutants.
      • A detailed within-bioreactor assessment identified the provenance of losses.
      • Damage cost to the environment and human health assessment justified conversion to a new setup.
      • This approach allows for a holistic assessment and improvement of a denitrifying bioreactor.
      doi:10.2134/jeq2015.10.0500
      Journal of Environmental Quality 2016 45:788-795
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    • Tahina Choudhury, Will Dean Robertson and Darryl S. Finnigan
      Suspended Sediment and Phosphorus Removal in a Woodchip Filter System Treating Agricultural Wash Water
      Core Ideas
      • Woodchip filters also remove total suspended solids (TSS) and associated particulate P.
      • Woodchip filters removed 98% of TSS from vegetable wash water with a TSS of 6 g L−1.
      • Woodchip filters removed 70% of total P, averaging 9 mg L−1.
      doi:10.2134/jeq2015.07.0380
      Journal of Environmental Quality 2016 45:796-802
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    • Natasha L. Hoover, Alok Bhandari, Michelle L. Soupir and Thomas B. Moorman
      Woodchip Denitrification Bioreactors: Impact of Temperature and Hydraulic Retention Time on Nitrate Removal
      Core Ideas
      • The results are useful for informing field-specific design of denitrification woodchip bioreactors.
      • Nitrate-N concentration reductions increased from 8 to 55% as hydraulic retention time increased.
      • Nitrate-N removal showed a stepped increase with temperature.
      • Weathered woodchips as a bioreactor substrate may reduce initial C losses to surface waters.
      doi:10.2134/jeq2015.03.0161
      Journal of Environmental Quality 2016 45:803-812
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    • Christine Lepine, Laura Christianson, Kata Sharrer and Steven Summerfelt
      Optimizing Hydraulic Retention Times in Denitrifying Woodchip Bioreactors Treating Recirculating Aquaculture System Wastewater
      Core Ideas
      • Woodchip bioreactor design parameters for aquaculture wastewater were developed.
      • This application resulted in the highest N removal rates reported (39 g N m−3 d−1).
      • Retention times differ for optimized removal efficiency versus removal rate.
      • Sulfate reduction intensified under prolonged N-limited environments.
      doi:10.2134/jeq2015.05.0242
      Journal of Environmental Quality 2016 45:813-821
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    • Mark B. David, Lowell E. Gentry, Richard A. Cooke and Stephanie M. Herbstritt
      Temperature and Substrate Control Woodchip Bioreactor Performance in Reducing Tile Nitrate Loads in East-Central Illinois
      Core Ideas
      • Bioreactor performance decreased greatly after Year 1.
      • Tile water temperature was limiting factor as wood chips aged.
      • Little N2O emitted from wood chip bed.
      • Bioreactor would need to be six times larger for this field and nitrate load.
      doi:10.2134/jeq2015.06.0296
      Journal of Environmental Quality 2016 45:822-829
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    • Dan B. Jaynes, Tom B. Moorman, Timothy B. Parkin and Tom C. Kaspar
      Simulating Woodchip Bioreactor Performance Using a Dual-Porosity Model
      Core Ideas
      • The denitrification rate within a bioreactor remained steady over a two-year study.
      • Denitrification in a woodchip bioreactor had a Q10 typically between 1 and 2.
      • Denitrification in a bioreactor was equally well modeled as zero- or first-order.
      • A dual-porosity model accurately simulated nitrate transport through a bioreactor.
      doi:10.2134/jeq2015.07.0342
      Journal of Environmental Quality 2016 45:830-838
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    • Zhengtao Cui, Claire Welty, Arthur J. Gold, Peter M. Groffman, Sujay S. Kaushal and Andrew J. Miller
      Use of a Three-Dimensional Reactive Solute Transport Model for Evaluation of Bioreactor Placement in Stream Restoration
      Core Ideas
      • We used a 3D reactive transport model to design subsurface bioreactor placement.
      • Nitrate-N removal rates of strategically placed bioreactors more than doubled.
      • Bioreactor nitrate-N removal was nitrate limited.
      • Optimized bioreactors were 50% of the length of nonoptimized bioreactors.
      • Bioreactors achieved up to 85% denitrification of nonoptimized bioreactors.
      doi:10.2134/jeq2015.06.0330
      Journal of Environmental Quality 2016 45:839-846
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    • Femke Rambags, Chris C. Tanner, Rebecca Stott and Louis A. Schipper
      Fecal Bacteria, Bacteriophage, and Nutrient Reductions in a Full-Scale Denitrifying Woodchip Bioreactor
      Core Ideas
      • Denitrifying bioreactors are a technology for nitrate removal from wastewater.
      • We show a full-scale bioreactor can also remove fecal bacteria and viruses.
      • Fecal bacteria and viruses were reduced by >2.9 log10.
      • Median effluent concentration of E. coli was 20 MPN (100 mL)−1.
      • Median effluent concentration of F-specific RNA phage was 3 PFU (100 mL) −1.
      doi:10.2134/jeq2015.06.0326
      Journal of Environmental Quality 2016 45:847-854
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    • Christopher S. Jones and Keegan J. Kult
      Use Alkalinity Monitoring to Optimize Bioreactor Performance
      Core Ideas
      • Use alkalinity monitoring to inform denitrification processes in woodchip bioreactors.
      • Use denitrification stoichiometry and alkalinity results to indicate N2O formation.
      • We deduce inorganic and organic carbon flux across denitrification bioreactor.
      doi:10.2134/jeq2015.06.0309
      Journal of Environmental Quality 2016 45:855-865
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    • Brandon C. Goeller, Catherine M. Febria, Jon S. Harding and Angus R. McIntosh
      Thinking beyond the Bioreactor Box: Incorporating Stream Ecology into Edge-of-Field Nitrate Management
      Core Ideas
      • Bioreactor location should complement farm- and watershed-scale N management.
      • Linked environmental parameters drive bioreactor performance and stream ecology.
      • Evaluate potential stream health benefits from bioreactors on ecological time scales.
      • Incorporate bioreactor ecological performance data into adaptive management plans.
      doi:10.2134/jeq2015.06.0325
      Journal of Environmental Quality 2016 45:866-872
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    • Kelly Addy, Arthur J. Gold, Laura E. Christianson, Mark B. David, Louis A. Schipper and Nicole A. Ratigan
      Denitrifying Bioreactors for Nitrate Removal: A Meta-Analysis
      Core Ideas
      • Denitrifying beds may reduce water quality degradation and treat onsite wastewaters.
      • Extending HRT can help manage nitrate under low temperatures and high flows.
      • Multiyear laboratory column and in-field bed assessments are needed to refine designs.
      doi:10.2134/jeq2015.07.0399
      Journal of Environmental Quality 2016 45:873-881
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  • SPECIAL SECTION: THE CONOWINGO RESERVOIR up

    • Carl F. Cerco
      Conowingo Reservoir Sedimentation and Chesapeake Bay: State of the Science
      Core Ideas
      • Reservoir sedimentation prevents sediments from entering Chesapeake Bay.
      • Reservoir sediment storage capacity is nearly exhausted.
      • Added sediment loads are not a threat to bay water quality.
      • Associated organic matter and nutrients are detrimental to bay water quality.
      doi:10.2134/jeq2015.05.0230
      Journal of Environmental Quality 2016 45:882-886
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    • Lewis C. Linker, Richard A. Batiuk, Carl F. Cerco, Gary W. Shenk, Richard Tian, Ping Wang and Guido Yactayo
      Influence of Reservoir Infill on Coastal Deep Water Hypoxia
      Core Ideas
      • The Conowingo Reservoir has been filling in with sediment for almost a century.
      • It is now in a state of near-full capacity called dynamic equilibrium.
      • Conowingo infill causes impairments to Chesapeake water quality.
      • The estimated impairments are primarily on deep water dissolved oxygen.
      • Increased discharge and transport of nutrients from Conowingo are the cause.
      doi:10.2134/jeq2014.11.0461
      Journal of Environmental Quality 2016 45:887-893
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    • Carl F. Cerco and Mark R. Noel
      Impact of Reservoir Sediment Scour on Water Quality in a Downstream Estuary
      Core Ideas
      • Reservoir sedimentation can adversely impact water quality downstream.
      • Infilling of Conowingo Reservoir results in increased sediments and nutrients passed through to Chesapeake Bay.
      • Sediments are not a threat to water quality in Chesapeake Bay.
      • Nutrients and organic matter associated with sediments contribute to eutrophication in Chesapeake Bay.
      doi:10.2134/jeq2014.10.0425
      Journal of Environmental Quality 2016 45:894-905
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  • ATMOSPHERIC POLLUTANTS AND TRACE GASES up

    • Ardell D. Halvorson, Stephen J. Del Grosso and Catherine E. Stewart
      Manure and Inorganic Nitrogen Affect Trace Gas Emissions under Semi-Arid Irrigated Corn
      Core Ideas
      • Nitrification inhibitor mixed with manure did not reduce N2O emissions.
      • Dairy manure provided a slow-release N with nitrate intensities lower than urea.
      • Delayed irrigation can increase ammonia losses from urea and affect subsequent N2O emissions.
      • Urea formulated with nitrification inhibitor can reduce N2O emissions.
      doi:10.2134/jeq2015.08.0426
      Journal of Environmental Quality 2016 45:906-914
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    • Steven Trabue, Brian Kerr and Kenwood Scoggin
      Odor and Odorous Compound Emissions from Manure of Swine Fed Standard and Dried Distillers Grains with Soluble Supplemented Diets
      Core Ideas
      • Odor emission is controlled by fed ingredients.
      • Odor emission from DDGS diets was dominated by volatile organic compounds.
      • Emission of ammonia from manure was between 30 and 50% N consumed.
      • Emission of H2S from manure was between 3 and 10% of S consumed.
      • Emission of volatile organic compounds from manure was <0.1% of C consumed.
      doi:10.2134/jeq2015.10.0511
      Journal of Environmental Quality 2016 45:915-923
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  • BIOREMEDIATION AND BIODEGRADATION up

    • María Balseiro-Romero, Panagiotis Gkorezis, Petra S. Kidd, Jaco Vangronsveld and Carmen Monterroso
      Enhanced Degradation of Diesel in the Rhizosphere of Lupinus luteus after Inoculation with Diesel-Degrading and Plant Growth-Promoting Bacterial Strains
      Core Ideas
      • Biostimulated rhizodegradation of diesel contaminated soils was applied.
      • The synergy between plants and microorganisms (diesel-degraders and PGP) was exploited.
      • Biosurfactants and root exudation highly influenced contaminant bioavailability.
      doi:10.2134/jeq2015.09.0465
      Journal of Environmental Quality 2016 45:924-932
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    • Shulan Zhao, Lina Jia and Lian Duo
      Combining Nitrilotriacetic Acid and Permeable Barriers for Enhanced Phytoextraction of Heavy Metals from Municipal Solid Waste Compost by Lolium perenne and Reduced Metal Leaching
      Core Ideas
      • Bone meal and crab shell were used as barrier materials in NTA-induced phytoextraction.
      • Permeable barriers effectively reduced metal leaching by the adsorption of biosorbents.
      • The addition of biodegradable NTA increased heavy metal uptake by L. perenne.
      • Use of biodegradable chelate combined with barriers is a viable approach to enhanced phytoextraction.
      doi:10.2134/jeq2016.01.0020
      Journal of Environmental Quality 2016 45:933-939
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  • ENVIRONMENTAL MICROBIOLOGY up

    • Jake W. Munroe, Ian McCormick, William Deen and Kari E. Dunfield
      Effects of 30 Years of Crop Rotation and Tillage on Bacterial and Archaeal Ammonia Oxidizers
      Core Ideas
      • No-till showed a trend of higher archaeal and AOA abundance across growing season.
      • AOA were on average more than 10-fold more abundant than AOB.
      • Expression of archaeal amoA gene was undetected in neutral pH agricultural soil.
      • Abundance and gene expression of AOB, but not AOA, decreased with soil depth.
      doi:10.2134/jeq2015.06.0331
      Journal of Environmental Quality 2016 45:940-948
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    • Yongeun Park, Yakov Pachepsky, Daniel Shelton, Jaehak Jeong and Gene Whelan
      Survival of Manure-borne Escherichia coli and Fecal Coliforms in Soil: Temperature Dependence as Affected by Site-Specific Factors
      Core Ideas
      • E. coli and fecal coliform survival in soil database was developed based on a literature search.
      • Classification and regression trees identified significant factors for bacteria survival.
      • Temperature and waste consistency were dominant factors for the presence of two-stage kinetics.
      • Soil water content and temperature were main factors for duration of the first stage.
      doi:10.2134/jeq2015.08.0427
      Journal of Environmental Quality 2016 45:949-957
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    • J. P. Brooks, M. R. McLaughlin, A. Adeli and D. M. Miles
      Cultivation and qPCR Detection of Pathogenic and Antibiotic-Resistant Bacterial Establishment in Naive Broiler Houses
      Core Ideas
      • Colonizing pathogens and antibiotic resistance took <3 wk to establish.
      • Full microbial colonization and stabilization took four flocks.
      • Pathogens and antibiotic resistance were not found in surrounding environment before flock placement.
      • Incoming birds may have provided the colonizing litter microbiome.
      doi:10.2134/jeq2015.09.0492
      Journal of Environmental Quality 2016 45:958-966
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  • ENVIRONMENTAL MODELS, MODULES, AND DATASETS up

    • Heidi L. Sieverding, Xianhui Zhao, Lin Wei and James J. Stone
      Life-Cycle Assessment of Oilseeds for Biojet Production Using Localized Cold-Press Extraction
      Core Ideas
      • Methods and varieties of nonfood oilseed agricultural production affect LCA results.
      • LCA uncertainty estimations are needed due to variability in biomass production and feedstock traits.
      • Feedstock production traits were found to influence the sustainability of biofuel processes.
      doi:10.2134/jeq2015.06.0313
      Journal of Environmental Quality 2016 45:967-976
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    • Risto Uusitalo, Jari Hyväluoma, Elena Valkama, Elise Ketoja, Annika Vaahtoranta, Perttu Virkajärvi, Juha Grönroos, Riitta Lemola, Kari Ylivainio, Kimmo Rasa and Eila Turtola
      A Simple Dynamic Model of Soil Test Phosphorus Responses to Phosphorus Balances
      Core Ideas
      • A simple model to project changes in STP was created.
      • Model inputs are present STP and P annual balance.
      • The model can be calibrated for several soil P tests.
      • Tests with separate data showed the model’s adequacy in predicting STP changes with time.
      doi:10.2134/jeq2015.09.0463
      Journal of Environmental Quality 2016 45:977-983
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  • HEAVY METALS IN THE ENVIRONMENT up

    • Bingfang Shi, Weiyuan Zuo, Jinlei Zhang, Haijuan Tong and Jinhe Zhao
      Removal of Lead(II) Ions from Aqueous Solution Using Jatropha curcas L. Seed Husk Ash as a Biosorbent
      Core Ideas
      • Jatropha curcas seed husk ash first reported as a new biosorbent to remove Pb(II).
      • J. curcas showed high adsorption capacity for Pb(II) removal from aqueous solutions.
      • J. curcas seed husk ash Pb(II) adsorption kinetics followed a pseudo-second-order kinetic model.
      • J. curcas seed husk ash for heavy-metal ions removal successful for industry wastewater samples.
      doi:10.2134/jeq2014.12.0533
      Journal of Environmental Quality 2016 45:984-992
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    • Seok-Young Oh and Hyun-Su Yoon
      Biochar Amendment for Reducing Leachability of Nitro Explosives and Metals from Contaminated Soils and Mine Tailings
      Core Ideas
      • Immobilization of explosives in soil can be obtained by adding biochar.
      • The curing period does not greatly affect the extractability of explosives in soil.
      • Biochar amendment for mine tailings is applicable under limited conditions.
      • Chemical forms of metals and types of extractants determine the metal leachability.
      • pH and sorption mechanisms determine the immobilization of metals with biochar.
      doi:10.2134/jeq2015.05.0222
      Journal of Environmental Quality 2016 45:993-1002
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    • Maryam Kargar, O. Grant Clark, William H. Hendershot, Pierre Jutras and Shiv O. Prasher
      Bioavailability of Sodium and Trace Metals under Direct and Indirect Effects of Compost in Urban Soils
      Core Ideas
      • Compost can affect metal bioavailability directly and indirectly.
      • Direct effect of compost can be related to the formation of organo-metallic complexes.
      • Strong bonds form between trace metals and the adsorbing surface in compost.
      • Compost can affect ion concentration and type, which compete to be absorbed by plants.
      • An indirect effect of compost is attributed to modified pH and CEC.
      doi:10.2134/jeq2015.07.0392
      Journal of Environmental Quality 2016 45:1003-1012
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    • Claire L. Phillips, Kristin M. Trippe, Gerald Whittaker, Stephen M. Griffith, Mark G. Johnson and Gary M. Banowetz
      Gasified Grass and Wood Biochars Facilitate Plant Establishment in Acid Mine Soils
      Core Ideas
      • Gasified biochars facilitated wheat growth in two mine spoil soils.
      • Biochars increased pH, moisture, and nutrients and reduced soluble heavy metals.
      • Gasified biochars have properties that may aid revegetation of mine spoils.
      doi:10.2134/jeq2015.09.0470
      Journal of Environmental Quality 2016 45:1013-1020
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  • LANDSCAPE AND WATERSHED PROCESSES up

    • Alisa C. Morrison, Arthur J. Gold and Marguerite C. Pelletier
      Evaluating Key Watershed Components of Low Flow Regimes in New England Streams
      Core Ideas
      • Watershed features affect the resilience of streams to sustain low flows.
      • Stratified glacial drift deposits help sustain low flows of streams.
      • Watersheds with high % wetlands warrant careful management of withdrawals.
      • Urban development is not among the strongest predictors of low flows.
      doi:10.2134/jeq2015.08.0434
      Journal of Environmental Quality 2016 45:1021-1028
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  • ORGANIC COMPOUNDS IN THE ENVIRONMENT up

    • Monica O. Mendez, Erika M. Valdez, Eileen M. Martinez, Melissa Saucedo and Brittan A. Wilson
      Fate of Triclosan in Irrigated Soil: Degradation in Soil and Translocation into Onion and Tomato
      Core Ideas
      • Irrigation waters are a potential source of triclosan exposure to crops.
      • Environmentally relevant concentrations of triclosan were examined.
      • Triclosan bioaccumulated in edible tissues of onions and tomatoes.
      • Concentrations determined are not considered harmful at current limits of exposure.
      doi:10.2134/jeq2015.07.0386
      Journal of Environmental Quality 2016 45:1029-1035
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  • PLANT AND ENVIRONMENT INTERACTIONS up

    • Marie Guittonny-Larchevêque, Bruno Bussière and Carl Pednault
      Tree–Substrate Water Relations and Root Development in Tree Plantations Used for Mine Tailings Reclamation
      Core Ideas
      • Planted trees developed roots in the tailings underlying the soil treatments.
      • Root development was limited in tailings underlying a compost and tailings mixture.
      • Trees were larger and had greater total leaf area when grown in thicker topsoil.
      • Trees showed low foliar water potential despite root access to tailings water reserve.
      • The volume of the soil treatment did not affect tree foliar water potentials.
      doi:10.2134/jeq2015.09.0477
      Journal of Environmental Quality 2016 45:1036-1045
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  • SURFACE WATER QUALITY up

    • Cristiane Q. Surbeck, F. Douglas Shields and Alexandra M. Cooper
      Fecal Indicator Bacteria Entrainment from Streambed to Water Column: Transport by Unsteady Flow over a Sand Bed
      Core Ideas
      • Fecal indicator bacteria occur in sandy streambed sediments.
      • Sand bed to water column coliforms increased rapidly as water velocity exceeded 0.2 m s−1.
      • Coliforms moved from the sand bed to the water column before bed movement.
      • Bedload should be further considered as a means of transporting coliforms.
      • TMDL development should consider stream sand beds as sources of bacteria.
      doi:10.2134/jeq2015.08.0441
      Journal of Environmental Quality 2016 45:1046-1053
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    • Jürgen Esperschütz, Obed Lense, Craig Anderson, Simon Bulman, Jacqui Horswell, Nicholas Dickinson and Brett Robinson
      Biowaste Mixtures Affecting the Growth and Elemental Composition of Italian Ryegrass ( Lolium multiflorum )
      Core Ideas
      • Biowastes (biosolids + sawdust) were effective in improving a low-fertility soil.
      • The biowaste mixture improved growth and quality of Lolium multiflorum over 5 months.
      • The biowaste treatments increased N, P, Cu, Mn, and Zn.
      • Mixing biosolids with sawdust reduced Cd uptake.
      • Biowaste induced changes in elemental composition increased over the 5-month period.
      doi:10.2134/jeq2015.09.0459
      Journal of Environmental Quality 2016 45:1054-1061
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    • Leonard C. Kibet, Ray B. Bryant, Anthony R. Buda, Peter J. A. Kleinman, Louis S. Saporito, Arthur L. Allen, Fawzy M. Hashem and Eric B. May
      Persistence and Surface Transport of Urea-Nitrogen: A Rainfall Simulation Study
      Core Ideas
      • Urea from terrestrial sources can increase frequency and toxicity of algal blooms.
      • The proportion of applied urea lost as urea in runoff was quite low (~1%).
      • Urea plus urease inhibitors yielded the most urea loss under worst-case conditions.
      • Urea “wash-off” soon after application poses the greatest risk to water quality.
      • Urea “wash-off” can be mitigated by adjusting method or timing of application.
      doi:10.2134/jeq2015.09.0495
      Journal of Environmental Quality 2016 45:1062-1070
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  • WASTE MANAGEMENT up

    • Dexter B. Watts and H. Allen Torbert
      Influence of Flue Gas Desulfurization Gypsum on Reducing Soluble Phosphorus in Successive Runoff Events from a Coastal Plain Bermudagrass Pasture
      Core Ideas
      • FGD gypsum can reduce dissolved P losses with surface water runoff.
      • FGD gypsum reduced P losses in succeeding runoff events during a growing season.
      • Optimal P reductions with FGD gypsum can be achieved with rate of 4.4 Mg ha−1.
      doi:10.2134/jeq2015.04.0203
      Journal of Environmental Quality 2016 45:1071-1079
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    • Luciana C. Panchoni, Cristiane A. Santos, Biana H. Kuwano, Kellen B. Carmo, Martha V. T. Cely, Admilton G. Oliveira-Júnior, Dáfila S. L. Fagotti, Vivian N. M. Cervantes, Waldemar Zangaro, Diva S. Andrade, Galdino Andrade and Marco A. Nogueira
      Effect of Landfill Leachate on Cereal Nutrition and Productivity and on Soil Properties
      Core Ideas
      • Landfill leachate was applied to the soil and assessed as nutrient source.
      • Ammoniacal N ran fast nitrification, Na and K increased in soil.
      • Biochemical soil properties were barely affected.
      • Black oat and corn benefited from nutrients, especially N and K.
      • Applications above 120 kg ha−1 of N led to N losses.
      doi:10.2134/jeq2015.06.0281
      Journal of Environmental Quality 2016 45:1080-1086
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      [ Supplement 1 ]
    • Hupenyu A. Mupambwa and Pearson N. S. Mnkeni
      Eisenia fetida Stocking Density Optimization for Enhanced Bioconversion of Fly Ash Enriched Vermicompost
      Core Ideas
      • Fly ash–cow dung–paper (FCP) vermicompost matures at lower Eisenia fetida stocking density.
      • Higher stocking density is essential for P and N release in FCP vermicompost.
      • Stocking density strongly influences the activity of degradation enzymes.
      • A stocking density of 25 g worms kg−1 is optimum for FCP vermicomposting.
      doi:10.2134/jeq2015.07.0357
      Journal of Environmental Quality 2016 45:1087-1095
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    • I. Regueiro, M. Pociask, J. Coutinho and D. Fangueiro
      Animal Slurry Acidification Affects Particle Size Distribution and Improves Separation Efficiency
      Core Ideas
      • Acidification increases dry matter and nitrogen content of slurries.
      • Particle size in slurry is affected by acidification.
      • Nutrient distribution among particles changes with acidification.
      • Acidification before separation increases the proportion of solid fractions.
      • The use of alum improves phosphorus separation efficiency.
      doi:10.2134/jeq2015.07.0403
      Journal of Environmental Quality 2016 45:1096-1103
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  • SHORT COMMUNICATIONS up

    • Fábio L. Melquiades and Edivaldo L. Thomaz
      X-Ray Fluorescence to Estimate the Maximum Temperature Reached at Soil Surface during Experimental Slash-and-Burn Fires
      Core Ideas
      • Application of PLS regression to EDXRF burned soil spectra.
      • Maximum burn temperature reached on soil was determined post-fire.
      • EDXRF analytical model predicts soil temperature and infers burn severity.
      doi:10.2134/jeq2015.06.0305
      Journal of Environmental Quality 2016 45:1104-1109
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  • ALSO IN THIS ISSUE up


    • ACS324.1 JOURNAL OF ENVIRONMENTAL QUALITY EDITORIAL BOARD 2015 Annual Reports
      doi:10.2134/jeq2015.01.0001ar
      Journal of Environmental Quality 2016 45:1110-1113
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    • Thanks to Our 2015 Reviewers
      doi:10.2134/jeq2015.01.0001tr
      Journal of Environmental Quality 2016 45:1114-1122
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