[1] Norwegian Inst Water Res NIVA, Okernveien 94, N-0579 Oslo, Norway
[2] Aarhus Univ, Dept Agroecol, Blichers Alle 20, DK-8830 Tjele, Denmark
[3] Royal HaskoningDHV, POB 8064, NL-9702 KB Groningen, Netherlands
[4] Univ Groningen, Fac Spatial Sci, POB 800, NL-9700 AV Groningen, Netherlands
[5] Agrifood & Biosci Inst, Agrienvironm Branch, 18a Newforge Ln, Belfast BT9 5PX, Antrim, North Ireland
[6] Univ Ljubljana, Biotech Fac, Dept Agr, SI-1000 Ljubljana, Slovenia
[7] Geol Survey Denmark & Greenland GEUS, Dept Quaternary & Groundwater Mapping, CF Mollers Alle 8,Bldg 1110, DK-8000 Aarhus, Denmark
[8] Escola Super Agr Coimbra, Polytech Inst Coimbra, Res Ctr Nat Resources Environm & Soc CERNAS, P-3045601 Coimbra, Portugal
[9] Univ Lincoln, Lincoln Inst Agrifood Technol, Lincoln LN6 7TS, England
[10] Chamber Agr Fed State Lower Saxony, Dist Off Braunschweig, Helene Kunne Allee 5, D-38122 Braunschweig, Germany