RossBaileyBriggsEtAl2015

Référence

Ross, D.S., Bailey, S.W., Briggs, R.D., Curry, J., Fernandez, I.J., Fredriksen, G., Goodale, C.L., Hazlett, P.W., Heine, P.R., Johnson, C.E., Larson, J.T., Lawrence, G.B., Kolka, R.K., Ouimet, R., Pare, D., Richter, D.D., Schirmer, C.D., Warby, R.A. (2015) Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America. Ecosphere, 6(5). (Scopus )

Résumé

Long-term forest soil monitoring and research often requires a comparison of laboratory data generated at different times and in different laboratories. Quantifying the uncertainty associated with these analyses is necessary to assess temporal changes in soil properties. Forest soil chemical properties, and methods to measure these properties, often differ from agronomic and horticultural soils. Soil proficiency programs do not generally include forest soil samples that are highly acidic, high in extractable Al, low in extractable Ca and often high in carbon. To determine the uncertainty associated with specific analytical methods for forest soils, we collected and distributed samples from two soil horizons (Oa and Bs) to 15 laboratories in the eastern United States and Canada. Soil properties measured included total organic carbon and nitrogen, pH and exchangeable cations. Overall, results were consistent despite some differences in methodology. We calculated the median absolute deviation (MAD) for each measurement and considered the acceptable range to be the median ± 2.5 x MAD. Variability among laboratories was usually as low as the typical variability within a laboratory. A few areas of concern include a lack of consistency in the measurement and expression of results on a dry weight basis, relatively high variability in the C/N ratio in the Bs horizon, challenges associated with determining exchangeable cations at concentrations near the lower reporting range of some laboratories and the operationally defined nature of aluminum extractability. Recommendations include a continuation of reference forest soil exchange programs to quantify the uncertainty associated with these analyses in conjunction with ongoing efforts to review and standardize laboratory methods. © 2015 Ross et al.

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@ARTICLE { RossBaileyBriggsEtAl2015,
    AUTHOR = { Ross, D.S. and Bailey, S.W. and Briggs, R.D. and Curry, J. and Fernandez, I.J. and Fredriksen, G. and Goodale, C.L. and Hazlett, P.W. and Heine, P.R. and Johnson, C.E. and Larson, J.T. and Lawrence, G.B. and Kolka, R.K. and Ouimet, R. and Pare, D. and Richter, D.D. and Schirmer, C.D. and Warby, R.A. },
    TITLE = { Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America },
    JOURNAL = { Ecosphere },
    YEAR = { 2015 },
    VOLUME = { 6 },
    NUMBER = { 5 },
    NOTE = { cited By 6 },
    ABSTRACT = { Long-term forest soil monitoring and research often requires a comparison of laboratory data generated at different times and in different laboratories. Quantifying the uncertainty associated with these analyses is necessary to assess temporal changes in soil properties. Forest soil chemical properties, and methods to measure these properties, often differ from agronomic and horticultural soils. Soil proficiency programs do not generally include forest soil samples that are highly acidic, high in extractable Al, low in extractable Ca and often high in carbon. To determine the uncertainty associated with specific analytical methods for forest soils, we collected and distributed samples from two soil horizons (Oa and Bs) to 15 laboratories in the eastern United States and Canada. Soil properties measured included total organic carbon and nitrogen, pH and exchangeable cations. Overall, results were consistent despite some differences in methodology. We calculated the median absolute deviation (MAD) for each measurement and considered the acceptable range to be the median ± 2.5 x MAD. Variability among laboratories was usually as low as the typical variability within a laboratory. A few areas of concern include a lack of consistency in the measurement and expression of results on a dry weight basis, relatively high variability in the C/N ratio in the Bs horizon, challenges associated with determining exchangeable cations at concentrations near the lower reporting range of some laboratories and the operationally defined nature of aluminum extractability. Recommendations include a continuation of reference forest soil exchange programs to quantify the uncertainty associated with these analyses in conjunction with ongoing efforts to review and standardize laboratory methods. © 2015 Ross et al. },
    AFFILIATION = { University of Vermont, Department of Plant and Soil Science, Burlington, VT 05405, United States; USDA Forest Service, Northern Research Station, Hubbard Brook Experimental Forest, 234 Mirror Lake Road, North Woodstock, NH 03262, United States; Divisionof Environmental Science, 358 Illick Hall, State University of New York College of Environmental Science and Forestry, One Forestry Drive, Syracuse, NY 13210, United States; Natural Resources Canada-Canadian Forest Service, 1219 Queen St. E., Sault Ste. Marie, ON 6A 2E5, Canada; University of Maine, School of Forest Resources, Deering Hall, Orono, ME 04469-5722, United States; Ecology and Evolutionary Biology, E213 Corson Hall, Cornell University, Ithaca, NY 14853, United States; Duke University, Environmental Science and Policy Division, Nicholas School of the Environment, Durham, NC 27708, United States; Department of Civil and Environmental Engineering, Syracuse University, 151 Link Hall, Syracuse, NY 13244, United States; USDA Forest Service, Northern Research Station, 1831 Hwy. 169 E., Grand Rapids, MN 55744-3399, United States; U.S. Geological Survey New York Water Science Center, 425 Jordan Road, Troy, NY 12180, United States; Direction de la Recherche Forestière, Ministère des Forêt, de la Faune et des Parcs du Québec, Complexe Scientifique, 2700 Einstein Street, Quebec City, QC G1P 3W8, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, P.O. Box 10380, Stn. Sainte-Foy, Québec, QC G1V 4C7, Canada; Warby Group LLC, 110 Arnold Road, North Attleboro, MA 02760, United States },
    AUTHOR_KEYWORDS = { Aluminum; Calcium; Carbon; Forest soils; Inter-laboratory variability; Laboratory methods; pH; Reference soils; Soil analysis; Special feature: Uncertainty analysis; Uncertainty },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1890/ES14-00209.1 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929352984&doi=10.1890%2fES14-00209.1&partnerID=40&md5=3b0c327aae8e6b760563a3b0c73a0c54 },
}

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