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@ARTICLE{Cai:819510,
      author       = {Cai, Gaochao and Vanderborght, Jan and Klotzsche, Anja and
                      van der Kruk, Jan and Neumann, Joschka and Hermes, Normen
                      and Vereecken, Harry},
      title        = {{C}onstruction of {M}inirhizotron {F}acilities for
                      {I}nvestigating {R}oot {Z}one {P}rocesses},
      journal      = {Vadose zone journal},
      volume       = {15},
      number       = {9},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {FZJ-2016-05153},
      pages        = {},
      year         = {2016},
      abstract     = {Minimally invasive monitoring of root development and soil
                      states (soil moisture, temperature) in undisturbed soils
                      during a crop growing cycle is a challenging task.
                      Minirhizotron (MR) tubes offer the possibility to view root
                      development in situ with time. Two MR facilities were
                      constructed in two different soils, stony vs. silty, to
                      monitor root growth, root zone processes, and their
                      dependence on soil water availability. To obtain a
                      representative image of the root distribution, 7-m-long
                      tubes were installed horizontally at 10-, 20-, 40-, 60-,
                      80-, and 120-cm depths. A homemade system was developed to
                      install MR tubes in the silty soil in horizontally drilled
                      straight holes. For the stony soil, the soil rhizotubes were
                      installed in an excavated and subsequently backfilled pit.
                      In both facilities, three subplots were established with
                      different water treatments: rain sheltered, rainfed, and
                      irrigated. To monitor soil moisture, water potential, and
                      soil temperature, time domain reflectometer probes,
                      tensiometers, and matrix water potential sensors were
                      installed. Soil water content profiles in space and time
                      were obtained between two MR tubes using cross-hole
                      ground-penetrating radar along the tubes at different
                      depths. Results from the first growing season of winter
                      wheat (Triticum aestivum L.) after installation demonstrate
                      that differences in root development, soil water, and
                      temperature dynamics can be observed among the different
                      soil types and water treatments. When combined with
                      additional measurements of crop development and
                      transpiration, these data provide key information that is
                      essential to validate and parameterize root development and
                      water uptake models in soil–vegetation–atmosphere
                      transfer models.},
      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:000389548200004},
      doi          = {10.2136/vzj2016.05.0043},
      url          = {https://juser.fz-juelich.de/record/819510},
}