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@ARTICLE{Polain:904462,
      author       = {Polain, Katherine and Knox, Oliver and Wilson, Brian and
                      Guppy, Christopher and Lisle, Leanne and Nachimuthu,
                      Gunasekhar and Osanai, Yui and Siebers, Nina},
      title        = {{D}istribution of subsoil microbial activity and biomass
                      under {A}ustralian rotational cotton as influenced by
                      system, crop status and season},
      journal      = {Soil research},
      volume       = {59},
      number       = {6},
      issn         = {0004-9573},
      address      = {Collingwood, Victoria},
      publisher    = {CSIRO},
      reportid     = {FZJ-2021-06032},
      pages        = {547 -},
      year         = {2021},
      abstract     = {Soils provide the substrate for important microbial
                      mechanisms that moderate a variety of processes in both
                      managed and natural terrestrial ecosystems. Australian soils
                      are particularly ‘stressed’ and are considered to be
                      highly weathered and nutrient deficient. This places
                      increased pressure on the Australian cotton industry to
                      sustainably increase productivity to support the fibre
                      demands of a growing global population. We explored Vertosol
                      subsoils (>30 cm) under rotational cotton crops, measuring
                      the distribution of soil microbial activity (SMA) and
                      biomass (SMB) to 100 cm depth, as influenced by crop system
                      and time, using respiration-based experiments. Seasonal SMA
                      fluctuations were considered by capturing the long-term SMA
                      between systems using stable oxygen isotope methodology. Our
                      results indicate that subsoils contributed $47\%$ of SMA,
                      regardless of system, but subsoil SMB $(26\%)$ was
                      constrained by resource availability. Long-term SMA was not
                      significantly influenced by depth and system, presumably as
                      a consequence of the shrink–swell nature of Vertosols
                      facilitating organic matter movement down the profile. The
                      impact of this organic matter on the activity of indigenous
                      microorganisms below the top 30 cm of the profile highlights
                      a need to consider deeper soil when unravelling the
                      potential microbial benefits to our cropping systems.},
      cin          = {IBG-3},
      ddc          = {640},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000555581500001},
      doi          = {10.1071/SR19335},
      url          = {https://juser.fz-juelich.de/record/904462},
}