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@ARTICLE{Graf:61731,
      author       = {Graf, A. and Kuttler, W. and Werner, J.},
      title        = {{M}ulching as a means of exploiting dew for arid
                      agriculture?},
      journal      = {Atmospheric research},
      volume       = {87},
      issn         = {0169-8095},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-61731},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A traditional mulching technique used in Lanzarote, Canary
                      Islands, allows dry fanning as well as pronounced water
                      savings in irrigation. It is known to reduce evaporational
                      losses, but is also supposed to enhance the nocturnal
                      condensation of water vapour from the atmosphere. The mulch
                      layer consists of porous volcanic rock fragments abundantly
                      available on the island. The mulched surface is believed to
                      cool rapidly and to be more hygroscopic than a bare soil
                      surface. This was investigated during a field experiment
                      conducted over 68 nights during different seasons in 2001
                      and 2002, as well as some simple laboratory measurements. It
                      was found that nocturnal condensation on the mulch surface
                      (max 0.33 mm) was lower than on the bare soil surface (max
                      0.57 mm) or any one of three alternative mulch substrates.
                      However, a slightly stronger nocturnal cooling of the
                      mulched as compared to the bare surface was present. It is
                      shown that these contrary findings can be explained by the
                      higher hygroscopicity of the dry loam soil, resulting in
                      condensation gains beyond the strict definition of dew.
                      Differences in plant-availability of non-hygroscopic dew
                      water and hygroscopic water uptakes are discussed, and
                      conditions under which mulching would show positive
                      condensation effects are defined. This includes a
                      theoretical section demonstrating that non-hygroscopic mulch
                      layers of a proper thickness can provide small amounts of
                      dew to plant roots at the mulch-soil interface. This
                      condensation could also happen during the day and would be
                      favoured by a high amplitude of the diurnal atmospheric
                      moisture cycle. (c) 2007 Elsevier B.V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000254477600018},
      doi          = {10.1016/j.atmosres.2007.11.016},
      url          = {https://juser.fz-juelich.de/record/61731},
}