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@INPROCEEDINGS{vonHebel:859498,
      author       = {von Hebel, Christian and Matveeva, Maria and Verweij,
                      Elizabeth and Rascher, Uwe and Rademske, Patrick and Brogi,
                      Cosimo and Kaufmann, Manuela and Mester, Achim and
                      Vereecken, Harry and van der Kruk, Jan},
      title        = {{U}nderstanding soil-plant interaction by analyzing
                      quantitative electromagnetic induction measurements and
                      inversions together with airborne hyperspectral data},
      reportid     = {FZJ-2019-00350},
      year         = {2018},
      abstract     = {Soil structural changes (layering and texture) influence
                      above surface processes such as plant performance and
                      growth, which is visible in airborne hyperspectral
                      measurements. However, the soil structural changes below the
                      ploughing layer are often ignored when studying spatial
                      plant patterns. Here, we investigate the origin of these
                      patterns due to soil structural changes by analyzing
                      airborne hyperspectral data in combination with non-invasive
                      geophysical fixed-boom multi-coil electromagnetic induction
                      (EMI) data. The HyPlant dual channel airborne imaging
                      spectrometer obtains sun-induced red- and far-red
                      fluorescence data as well as derived vegetation indices,
                      which indicate plant performance and growth. The EMI
                      instruments measure the soil apparent electrical
                      conductivity (ECa) that is a weighted average value over a
                      specific depth range depending on the transmitter-receiver
                      coil configuration i.e. coil separation and orientation.
                      After ECa calibration and quantitative EMI data inversion, a
                      layeredsubsurface electrical conductivity () model
                      reflecting soil structural changes is obtained. At our test
                      site, thefixed-boom multi-coil ECa maps of nine EMI coil
                      configurations spatially indicated soil patterns due to
                      buriedpaleo-river channels that interact with the plants as
                      observed in the airborne hyperspectral data. After EMI
                      datainversions, the layered quasi-3D model showed a
                      relatively homogeneous ploughing layer in the upper 30 cmand
                      the paleo-river channels appeared in the subsoil below
                      approximately 0.85 m depth. The correlation coefficient(r)
                      between the layer and hyperspectral data confirmed that not
                      the ploughing layer (r 0.35) but the subsoil(r 0.65) was
                      responsible for plant performance and growth due to
                      differences in soil structure and thus waterholding capacity
                      especially during dry periods. For the first time, we
                      combined depth specific 3D soil structuralinformation
                      obtained by quantitative fixed-boom multi-coil EMI data
                      inversions and airborne hyperspectral data toshow that the
                      above surface plant performance is strongly influenced by
                      the subsoil at the investigated site.
                      Conclusively,quantitative multi-coil EMI measurements and
                      inversions can deliver valuable information about the topand
                      subsoil structural organization that needs to be included in
                      plant modeling tools for an improved descriptionof above and
                      below surface processes.},
      month         = {Apr},
      date          = {2018-04-08},
      organization  = {European Geoscience Union General
                       Assembly, Vienna (Austria), 8 Apr 2018
                       - 13 Apr 2018},
      subtyp        = {After Call},
      cin          = {IBG-3 / ZEA-2},
      cid          = {I:(DE-Juel1)IBG-3-20101118 / I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/859498},
}