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@ARTICLE{Squaris:367,
      author       = {Séquaris, J.-M. and Philipp, H. and Narres, H. D. and
                      Vereecken, H.},
      title        = {{E}ffects of mineral surface iron on the {CPMAS}
                      {C}-13-{NMR} spectroscopic detection of organic matter from
                      soil fractions in an agricultural topsoil with different
                      amendments},
      journal      = {European journal of soil science},
      volume       = {59},
      issn         = {1351-0754},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {PreJuSER-367},
      pages        = {592 - 599},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The decrease of NMR visibility of the C signal in soil
                      samples due to the association between organic carbon (OC)
                      and the topsoil mineral surface was investigated. CPMAS
                      13C-NMR spectra were obtained for soil particle-size
                      fractions (< 2 μm, 2–20 μm, > 20 μm) and bulk
                      soils from an agricultural topsoil (Chernozem) that had
                      received three different amendments (no fertilization,
                      mineral fertilization (NPK), mineral (NPK) and organic
                      (cattle manure) fertilizations) at Bad Lauchstädt, Germany.
                      The soil organic carbon content of the three soils depended
                      on the degree of soil fertilization. There was no constant
                      relationship between the total NMR signal intensity and the
                      total amount of organic carbon (TOC) for all size fractions.
                      Indeed, a key role played in the C signal intensity by the
                      paramagnetic ferric ion from the clay content in soil
                      fractions and bulk soils was confirmed. Thus, we describe
                      the variations of C signal intensity by taking into account
                      the distribution of clay-associated OC and non-associated OC
                      pools. Depending on the amendment, the C signal visibility
                      was weakened by a factor of 2–4 for the clay-associated
                      OC. This estimation was rendered possible by combining
                      mineral specific surface area (SSA) measurements with the N2
                      gas adsorption method (BET method) and determination of TOC
                      and iron concentrations. This approach contributes to the
                      quantitative evaluation of the CPMAS 13C-NMR detection.},
      cin          = {ICG-4 / JARA-ENERGY / JARA-SIM},
      ddc          = {630},
      cid          = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$ /
                      I:(DE-Juel1)VDB1045},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000255917300019},
      doi          = {10.1111/j.1365-2389.2008.01044.x},
      url          = {https://juser.fz-juelich.de/record/367},
}