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@ARTICLE{Sun:884306,
      author       = {Sun, Yajie and Wu, Bei and Amelung, W. and Christensen, B.
                      T. and Pätzold, S. and Bauke, S. L. and Schweitzer, K. and
                      Baumecker, M. and Bol, R.},
      title        = {{N}on-critical uranium accumulation in soils of {G}erman
                      and {D}anish long-term fertilizer experiments},
      journal      = {Geoderma},
      volume       = {370},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-03192},
      pages        = {114336 -},
      year         = {2020},
      abstract     = {Phosphorus (P) fertilizers vary considerably in contents of
                      uranium (U), thus raising concerns regarding U accumulation
                      in agricultural soils. We examined U concentrations in soil
                      from three long-term field experiments with different P
                      fertilizer applications: Rengen (P fertilizer from basic
                      slag, grassland, Germany), Thyrow (P fertilizer from igneous
                      phosphate rocks, arable land, Germany) and Askov (P
                      fertilizer from igneous phosphate rocks, arable land,
                      Denmark). Accumulation rates were low for Rengen (1.3 µg U
                      kg−1 yr−1) and Thyrow (0.6 µg U kg−1 yr−1) in
                      P-treated plots compared with plots without P fertilization.
                      These accumulation rates were ten times lower than those
                      previously reported (mean 17 µg U kg−1 yr−1).
                      Intriguingly, concentrations of acid-extractable U in the
                      Askov topsoil increased from 1923 to 2016, regardless of
                      whether P was added (5.1 µg kg−1 yr−1) or not (4.7 µg
                      kg−1 yr−1). This suggests that at least part of the
                      accumulated U originated from other sources than P
                      fertilizers. Total U concentrations were significantly
                      larger in the period 1985–2016 than in the period
                      1938–1976 in Askov soil treated with NPK but not in soils
                      without P fertilization. Hence, long-term P fertilizer
                      application did increase the soil U concentrations at Askov,
                      although at a low level.},
      cin          = {IBG-3},
      ddc          = {910},
      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:000528270900011},
      doi          = {10.1016/j.geoderma.2020.114336},
      url          = {https://juser.fz-juelich.de/record/884306},
}