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@ARTICLE{Squaris:11859,
      author       = {Séquaris, J.-M. and Guisado, G. and Magarinos, M. and
                      Moreno, C. and Burauel, P. and Narres, H.-D. and Vereecken,
                      H.},
      title        = {{O}rganic-carbon fractions in an agricultural topsoil
                      assessed by the determination of the soil mineral surface
                      area},
      journal      = {Journal of plant nutrition and soil science},
      volume       = {173},
      issn         = {1436-8730},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PreJuSER-11859},
      pages        = {699 - 705},
      year         = {2010},
      note         = {We thank three anonymous reviewers and the Associate Editor
                      for their numerous valuable comments which helped to improve
                      the manuscript. This work was performed as part of the HGF
                      strategy fund project "Soil Functions" We thank C Walraf for
                      her skilful laboratory assistance and J. Borchardt
                      (Troposphere, ICG 2) for his help with the N<INF>2</INF>
                      gas-adsorption technique We are grateful to Dr. M. Kehl
                      (INRES, Bonn University) for the particle-size-distribution
                      analysis The elemental chemical analyses performed at the
                      Central Division of Analytical Chemistry (ZCH) are
                      gratefully acknowledged G Guisado (gregorig@ucr.edu), M. R.
                      Magarinos (rosario.magarinos-bernabe@basf.com), and C Moreno
                      (clkcarlos2@mixmail.com) on leave from the University of
                      Burgos (Spain) were supported by the European Community
                      (Erasmus Grant)},
      abstract     = {According to recent conceptual models, the organic carbon
                      (OC) of soils can be divided into OC fractions of increasing
                      stability from labile free OC to resistant OC associated
                      with the soil mineral phase. In this study, we present a
                      method for quantifying two OC fractions based on soil
                      aggregate-size fractionation and the N-2 gas-adsorption
                      method. For this purpose, we analyzed soil material of the
                      plow layer of a Haplic Chernozem subjected to different
                      fertilizer treatments (no fertilizer, mineral fertilizer,
                      mineral and organic fertilizer). The total organic-C
                      concentration (TOO) and the clay content of the different
                      size fractions were determined as well as the specific
                      surface area (SSA(mineral)) and the sample pore volume after
                      thermal oxidation (OC-free). The TOC of the different
                      soil-aggregate fractions was linearly related to
                      SSA(mineral). Clay-associated OC and nonassociated OC
                      fractions of the different soil samples were quantified
                      using two methods based on the OC surface loading at the
                      clay fraction. The application of organic fertilizer
                      increased the amount of nonassociated OC but hardly affected
                      the concentration of clay-associated OC. This finding agrees
                      with previous studies on C dynamics in soils and indicates a
                      finite capacity of soil materials to sequester OC. Even
                      without any addition of organic fertilizer, the mineral
                      phase of the analyzed soil material appears to be
                      C-saturated.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4 / JARA-ENERGY},
      ddc          = {570},
      cid          = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Agronomy / Plant Sciences / Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000283628200008},
      doi          = {10.1002/jpln.200800224},
      url          = {https://juser.fz-juelich.de/record/11859},
}