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@ARTICLE{Siebers:844597,
      author       = {Siebers, Nina and Abdelrahman, Hamada and Krause, Lars and
                      Amelung, Wulf},
      title        = {{B}ias in aggregate geometry and properties after
                      disintegration and drying procedures},
      journal      = {Geoderma},
      volume       = {313},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2018-02001},
      pages        = {163 - 171},
      year         = {2018},
      abstract     = {Isolation and drying soil microaggregates and their
                      building units are of crucial importance when studying their
                      structure and function within different soil management
                      systems. Our aim was to evaluate how different drying
                      techniques preserve small aggregate building units after
                      different disintegration steps. After applying fast wetting,
                      slaking, or ultrasonic dispersion at 440 J mL− 1 to
                      Cambisol topsoils under either long-term forest, grassland,
                      or arable soil management, aggregate-size distributions were
                      assessed using fast image analyses after optical
                      particle-size assessment prior and after air- and
                      freeze-drying. Microaggregates isolated by dry-sieving
                      served as control. While ultrasonic dispersion significantly
                      disintegrated soil aggregates into smaller units, slaking in
                      water did not. Intriguingly, freeze-drying preserved the
                      aggregate size distribution fairly well, with a
                      reaggregation ranging between 1.2 and $10.1\%.$ In contrast,
                      air-drying led to substantial reaggregation of particles
                      ranging between 20.4 and $44.9\%.$ However, freeze-drying
                      also led to slight deformation of particles and also to a
                      redistribution of elements between size-fractions, the
                      extent of which being different for the samples under
                      different land-use. We conclude that ultrasonic treatment
                      followed by freeze-drying is suitable to preserve the
                      correct aggregate size of at least Cambisols, but the
                      properties of the secondary particles may still not reflect
                      true geometric forms and chemical properties.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000424179800016},
      doi          = {10.1016/j.geoderma.2017.10.028},
      url          = {https://juser.fz-juelich.de/record/844597},
}