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You searched for: Journal name Journal of environmental quality Remove constraint Journal name: Journal of environmental quality Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Source 2018 v.47 no.4 Remove constraint Source: 2018 v.47 no.4
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1. A Global Meta-Analysis of Grazing Impacts on Soil Health Indicators

Author:
Ryan C. Byrnes; Danny J. Eastburn; Kenneth W. Tate; Leslie M. Roche
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 758-765
ISSN:
0047-2425
Subject:
bulk density; carbon nitrogen ratio; climate change; continuous grazing; dry environmental conditions; grazing intensity; grazing lands; grazing management; guidelines; issues and policy; livelihood; livestock; meta-analysis; rotational grazing; soil; soil compaction; soil organic carbon; soil quality; subhumid zones; total nitrogen
Abstract:
... Grazing lands support the livelihoods of millions of people across nearly one-half of the globe. Soils are the backbone of stability and resilience in these systems. To determine livestock grazing impacts on soil health, we conducted a global meta-analysis of soil organic carbon (SOC), total N, C/N ratio, and bulk density responses to grazing strategies (continuous, rotational, and no grazing) and ...
DOI:
10.2134/jeq2017.08.0313

2. An Integrated Approach to Identify Critical Source Areas of Agricultural Nonpoint-Source Pollution at the Watershed Scale

Author:
Feier Wang; Zuolei Sun; Siyuan Zheng; Jie Yu; Xinqiang Liang
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 922-929
ISSN:
0047-2425
Subject:
aquaculture; livestock farming; losses from soil; models; municipal wastewater; nitrogen; nonpoint source pollution; phosphorus; pollution control; risk; water quality; watersheds; China
Abstract:
... Nonpoint sources are difficult to control because their nutrient contribution from different parts of a watershed can vary substantially. Identifying critical source areas of nutrient loss is an important step in watershed pollution mitigation programs. This study sought to use an integrated index model to differentiate between subbasins that serve as critical source areas of N and P nonpoint sour ...
DOI:
10.2134/jeq2017.12.0469

3. Building an Open Science Framework to Model Soil Organic Carbon

Author:
Edward Flathers; Paul E. Gessler
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 726-734
ISSN:
0047-2425
Subject:
computer software; funding; metadata; prediction; small cereal grains; soil organic carbon; soil properties; soil quality; statistical models; Northwestern United States
Abstract:
... As funding agencies embrace open science principles that encourage sharing data and computer code developed to produce research outputs, we must respond with new modes of publication. Furthermore, as we address the expanding reproducibility crisis in the sciences, we must work to release research materials in ways that enable reproducibility—publishing data, computer code, and research products in ...
DOI:
10.2134/jeq2017.08.0318
CHORUS:
10.2134/jeq2017.08.0318

4. CQESTR-Simulated Response of Soil Organic Carbon to Management, Yield, and Climate Change in the Northern Great Plains Region

Author:
P. R. Nash; H. T. Gollany; U. M. Sainju
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 674-683
ISSN:
0047-2425
Subject:
Hordeum vulgare; Pisum sativum; arid lands; barley; carbon dioxide; climate change; climatic factors; conventional tillage; cropping sequence; fallow; fertilizer rates; grain yield; greenhouse gas emissions; nitrogen fertilizers; no-tillage; peas; simulation models; soil organic carbon; soil quality; topsoil; Great Plains region; Montana
Abstract:
... Traditional dryland crop management includes fallow and intensive tillage, which have reduced soil organic carbon (SOC) over the past century, raising concerns regarding soil health and sustainability. The objectives of this study were: (i) to use CQESTR, a process-based C model, to simulate SOC dynamics from 2006 to 2011 and to predict relative SOC trends in cropping sequences that included barle ...
Handle:
10113/5935598
DOI:
10.2134/jeq2017.07.0273

5. Carbon Dosing Increases Nitrate Removal Rates in Denitrifying Bioreactors at Low-Temperature High-Flow Conditions

Author:
Marta B. Roser; Gary W. Feyereisen; Kurt A. Spokas; David J. Mulla; Jeffrey S. Strock; Jessica Gutknecht
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 856-864
ISSN:
0047-2425
Subject:
Macadamia; acetates; biochar; bioreactors; carbon; coconuts; coir; conservation practices; corn cobs; cropland; denitrification; drainage; hardwood; improved wood; laboratory experimentation; nitrate nitrogen; nitrates; nitrogen; pollution load; sodium acetate; spring; surface water; temperature; wood chips; Midwestern United States
Abstract:
... Nitrogen losses from croplands contribute to impairment of water bodies. This laboratory experiment evaluated various C sources for use in a denitrifying bioreactor, a conservation practice designed to reduce N losses. The nitrate removal efficiency of candidate treatments (corn cobs [CC], corn cobs with modified coconut coir [CC+MC], corn cobs with modified coconut coir and modified macadamia she ...
DOI:
10.2134/jeq2018.02.0082

6. Celebrating the 350th Anniversary of Phosphorus Discovery: A Conundrum of Deficiency and Excess

Author:
Andrew Sharpley; Helen Jarvie; Don Flaten; Peter Kleinman
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 774-777
ISSN:
0047-2425
Subject:
animal manures; byproducts; conservation practices; food prices; phosphorus; production technology; public-private partnerships; resource management; supply chain
Abstract:
... 2019 will be the 350th anniversary of the discovery of phosphorus (P) by the alchemist Hennig Brandt. This perspective traces the historical threads that P has weaved through the fabric of our society and identifies challenges to improve P stewardship in the future and for our future. A century after Brandt’s discovery, P was identified in bone ash, which became the primary source of P until guano ...
DOI:
10.2134/jeq2018.05.0170

7. Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Author:
I. C. Romero-Soto; O. Dia; L. A. Leyva-Soto; P. Drogui; G. Buelna; L. M. Díaz-Tenorio; R. G. Ulloa-Mercado; P. Gortáres-Moroyoqui
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 805-811
ISSN:
0047-2425
Subject:
animal production; anodes; antibiotics; aquaculture; aquaculture industry; aquatic environment; chloramphenicol; developing countries; energy; farming systems; inorganic compounds; wastewater
Abstract:
... Chloramphenicol (CAP) is a broad-spectrum antibiotic widely used in animal farming and aquaculture industries. Despite its ban in many countries around the world, it is still used in several developing countries, with harmful effects on the surrounding aquatic environment. In this study, an electrooxidation process using a Ti/PbO₂ anode was used to investigate the degradation of CAP in both synthe ...
DOI:
10.2134/jeq2017.12.0475

8. Greater Impacts of Incubation Temperature and Moisture on Carbon and Nitrogen Cycling in Poultry Relative to Horse Manure-based Soil Amendments

Author:
Gabriel Maltais-Landry; Nicolas Bertoni; Will Valley; Nicholas Grant; Zoran Nesic; Sean M. Smukler
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 914-921
ISSN:
0047-2425
Subject:
ammonium; carbon; carbon dioxide; chickens; environmental impact; greenhouse gas emissions; greenhouse gases; horses; methane; nitrates; nitrogen; nitrogen cycle; nitrous oxide; soil amendments; temperature; total nitrogen; water holding capacity
Abstract:
... Manure-based soil amendments (MBSAs) must be managed optimally to maximize N concentration and availability while minimizing environmental impacts (e.g., greenhouse gas [GHG]) emissions. We conducted an 83-d incubation study to determine the effects of different moisture (60 or 120% of water-holding capacity [WHC]) and temperature (4 or 20°C) conditions during the decomposition of MBSAs. We measur ...
DOI:
10.2134/jeq2017.11.0420

9. Measurements and Models to Identify Agroecosystem Practices That Enhance Soil Organic Carbon under Changing Climate

Author:
Hero T. Gollany; Rodney T. Venterea
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 579-587
ISSN:
0047-2425
Subject:
agricultural management; agroecosystems; arid lands; biomass; climate; climate change; crop yield; ecosystem management; grasslands; landscapes; meta-analysis; models; pastures; soil organic carbon; temperature
Abstract:
... Adapting to the anticipated impacts of climate change is a pressing issue facing agriculture, as precipitation and temperature changes are expected to have major effects on agricultural production in many regions of the world. These changes will also affect soil organic matter decomposition and associated stocks of soil organic C (SOC), which have the potential to feed back to climate change and a ...
Handle:
10113/6472330
DOI:
10.2134/jeq2018.05.0213

10. Methylmercury Dynamics in Upper Sacramento Valley Rice Fields with Low Background Soil Mercury Levels

Author:
K. Christy Tanner; Lisamarie Windham-Myers; Mark Marvin-DiPasquale; Jacob A. Fleck; Kenneth W. Tate; Bruce A. Linquist
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 830-838
ISSN:
0047-2425
Subject:
Oryza sativa; drainage water; fallow; growing season; irrigation water; mercury; methylmercury compounds; paddies; rice; rice straw; soil; surface water; toxicity; water quality; California
Abstract:
... Few studies have considered how methylmercury (MeHg, a toxic form of Hg produced in anaerobic soils) production in rice (Oryza sativa L.) fields can affect water quality, and little is known about MeHg dynamics in rice fields. Surface water MeHg and total Hg (THg) imports, exports, and storage were studied in two commercial rice fields in the Sacramento Valley, California, where soil THg was low ( ...
DOI:
10.2134/jeq2017.10.0390

11. Modeling Regional Effects of Climate Change on Soil Organic Carbon in Spain

Author:
Asma Jebari; Agustin del Prado; Guillermo Pardo; José Antonio Rodríguez Martín; Jorge Álvaro-Fuentes
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 644-653
ISSN:
0047-2425
Subject:
United Nations Framework Convention on Climate Change; agricultural land; carbon sequestration; carbon sinks; climate change; crops; models; no-tillage; soil organic carbon; surface area; temperature; vegetation cover; Spain
Abstract:
... Soil organic C (SOC) stock assessments at the regional scale under climate change scenarios are of paramount importance in implementing soil management practices to mitigate climate change. In this study, we estimated the changes in SOC sequestration under climate change conditions in agricultural land in Spain using the RothC model at the regional level. Four Intergovernmental Panel on Climate Ch ...
DOI:
10.2134/jeq2017.07.0294

12. Perennialization and Cover Cropping Mitigate Soil Carbon Loss from Residue Harvesting

Author:
Curtis D. Jones; Lawrence G. Oates; G. Philip Robertson; R. Cesar Izaurralde
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 710-717
ISSN:
0047-2425
Subject:
Glycine max; Miscanthus; Panicum virgatum; Secale; Zea mays; biofuels; climate; corn; cover crops; double cropping; feedstocks; fuel production; harvesting; models; perennials; rye; soil; soil organic carbon; stover; Midwestern United States
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 and cropping systems that offset residue-harvest-induced SOC losses. Sequestration ...
DOI:
10.2134/jeq2017.04.0177

13. Simulated Soil Organic Carbon Response to Tillage, Yield, and Climate Change in the Southeastern Coastal Plains

Author:
P. R. Nash; H. T. Gollany; J. M. Novak; P. J. Bauer; P. G. Hunt; D. L. Karlen
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 663-673
ISSN:
0047-2425
Subject:
Glycine max; Gossypium hirsutum; Kandiudults; Secale cereale; Triticum aestivum; Zea mays; climate change; conservation tillage; conventional tillage; corn; cover crops; crop rotation; crop yield; humid zones; loamy sand soils; models; rye; soil organic carbon; soil profiles; winter; winter wheat
Abstract:
... Intensive tillage, low-residue crops, and a warm, humid climate have contributed to soil organic carbon (SOC) loss in the southeastern Coastal Plains region. Conservation (CnT) tillage and winter cover cropping are current management practices to rebuild SOC; however, there is sparse long-term field data showing how these management practices perform under variable climate conditions. The objectiv ...
Handle:
10113/5935600
DOI:
10.2134/jeq2017.05.0190

14. Simulating Soil Organic Carbon Responses to Cropping Intensity, Tillage, and Climate Change in Pacific Northwest Dryland

Author:
Hero T. Gollany; Robert W. Polumsky
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 625-634
ISSN:
0047-2425
Subject:
Sorghum bicolor subsp. drummondii; Triticum aestivum; arid lands; climate; climate change; climate models; cropping systems; data collection; emissions; environmental assessment; grain yield; no-tillage; plows; soil depth; soil organic carbon; soil quality; weather; winter wheat; Oregon
Abstract:
... Managing dryland cropping systems to increase soil organic C (SOC) under changing climate is challenging after decades of winter wheat (Triticum aestivum L.)–fallow and moldboard plow tillage (W–F/MP). The objective was to use CQESTR, a process-based C model, and SOC data collected in 2004, 2008, and 2012 to predict the best management to increase SOC under changing climate in four cropping system ...
Handle:
10113/5935602
DOI:
10.2134/jeq2017.09.0374

15. Spatial Gradients of Ecosystem Health Indicators across a Human-Impacted Semiarid Savanna

Author:
Tor-Gunnar Vågen; Leigh Ann Winowiecki; Wayne Twine; Karen Vaughan
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 746-757
ISSN:
0047-2425
Subject:
algorithms; clay; climatic factors; ecosystems; environmental health; land management; landscapes; model validation; pH; prediction; remote sensing; sand; sand fraction; savannas; soil erosion; soil organic carbon; soil texture; spectroscopy; statistical models; topsoil; South Africa
Abstract:
... Drivers of soil organic carbon (SOC) dynamics involve a combination of edaphic, human, and climatic factors that influence and determine SOC distribution across the landscape. High-resolution maps of key indicators of ecosystem health can enable assessments of these drivers and aid in critical management decisions. This study used a systematic field-based approach coupled with statistical modeling ...
DOI:
10.2134/jeq2017.07.0300

16. Temperature and Manure Placement in a Snowpack Affect Nutrient Release from Dairy Manure during Snowmelt

Author:
Peter A. Vadas; Melanie N. Stock; Gary W. Feyereisen; Francisco J. Arriaga; Laura W. Good; K. G. Karthikeyan
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 848-855
ISSN:
0047-2425
Subject:
ammonia; risk; ammonium; application rate; dairy manure; liquid manure; melting; nitrogen; nutrient management; phosphorus; runoff; snow; snowmelt; snowpack; temperature; volatilization; water quality; winter
Abstract:
... Agricultural nutrient management is an issue due to N and P losses from fields and water quality degradation. Better information is needed on the risk of nutrient loss in runoff from dairy manure applied in winter. We investigated the effect of temperature on nutrient release from liquid and semisolid manure to water, and of manure quantity and placement within a snowpack on nutrient release to me ...
Handle:
10113/6743204
DOI:
10.2134/jeq2017.12.0464

17. A Field-Scale Approach to Estimate Nitrate Loading to Groundwater

Author:
Farzin Malekani; M. Cathryn Ryan; Bernie J. Zebarth; Shawn E. Loo; Martin Suchy; Edwin E. Cey
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 795-804
ISSN:
0047-2425
Subject:
Rubus idaeus; agricultural land; autumn; groundwater; hydraulic conductivity; mass transfer; monitoring; nitrate nitrogen; nitrates; pollution load; raspberries; samplers; water pollution; water quality
Abstract:
... The quantification of groundwater NO₃ loading associated with a specific field or set of management practices so that groundwater quality improvements can be objectively assessed is a major challenge. The magnitude and timing of NO₃ export from a single agricultural field under raspberry (Rubus idaeus L.) production were investigated by combining high-resolution groundwater NO₃ concentration profi ...
DOI:
10.2134/jeq2017.09.0369

18. A Modeling Framework to Evaluate the Impacts of Future Climate on Soil Organic Carbon Dynamics

Author:
Maria Chu; Jorge Guzman; Maria Villamil
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 596-606
ISSN:
0047-2425
Subject:
Glycine max; Zea mays; agroecosystems; air temperature; climate models; climatic factors; corn; crop rotation; data collection; nitrogen; simulation models; soil; soil organic carbon; uncertainty; Illinois
Abstract:
... Soil organic C (SOC) is significantly affected by changes in climate that control the physical, chemical, and biological processes in the soil. Simulating the impacts of future climate on SOC is challenging due to the limited availability of soil and climate variables required to properly simulate future SOC dynamics. The main objective of this study was to develop a modeling framework to quantify ...
DOI:
10.2134/jeq2017.07.0295

19. Ammonia Emissions from Subalpine Forest and Mountain Grassland Soils in Rocky Mountain National Park

Author:
Joshua J. Stratton; Jay Ham; Thomas Borch
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 778-785
ISSN:
0047-2425
Subject:
air temperature; airshed; ammonia; ammonium; ammonium nitrogen; ecosystems; emissions; eutrophication; forest soils; forests; grassland soils; grasslands; isotopes; mechanistic models; national parks; wet deposition; Colorado
Abstract:
... Atmospheric deposition of NH₃ and NH₄⁺ contributes to eutrophication within sensitive subalpine ecosystems of Rocky Mountain National Park (RMNP) in the United States. However, little is known about the local contribution of NH₃ from soils within the park. Thus, the goal of this study was to quantify and compare NH₃ emissions from intact soil cores sampled from a subalpine grassland and forest wit ...
DOI:
10.2134/jeq2018.01.0023

20. Assessing the Impact of Non-Urea Ruminant Urine Nitrogen Compounds on Urine Patch Nitrous Oxide Emissions

Author:
Camilla A. Gardiner; Timothy J. Clough; Keith C. Cameron; Hong J. Di; Grant R. Edwards; Cecile A. M. de Klein
Source:
Journal of environmental quality 2018 v.47 no.4 pp. 812-819
ISSN:
0047-2425
Subject:
Lolium perenne; allantoin; autumn; biodegradation; creatine; creatinine; emissions factor; excretion; field experimentation; greenhouse gas emissions; hypoxanthine; isotope labeling; laboratory experimentation; nitrogen; nitrogen content; nitrous oxide; pastures; ruminants; soil; stable isotopes; urea; uric acid; urine; xanthine
Abstract:
... Urea, the dominant form of N in ruminant urine, degrades in soil to produce N₂O emissions. However, the fate of non-urea urine N compounds (NUNCs) in soil and their contribution to urine patch N₂O emissions remain unclear. This study evaluated five NUNCs: allantoin (10%), creatinine (3%), creatine (3%), uric acid (1%), and (hypo)xanthine (0.6%), where numbers in parentheses represent the average p ...
DOI:
10.2134/jeq2018.03.0112