Feto E. Berisso¹, Per Schjonning¹, Thomas Keller², Mathieu Lamandé¹, Lis de Jonge¹, Bo V. Iversen¹, Asko simojoki³, Johan Arvidsson⁴, Laura Alakukku⁵ and Johannes Forkman⁶, (1)Aarhus University, Tjele, Denmark, (2)Department of Natural Resources and Agriculture, Agroscope Research Station, Zurich, Switzerland, (3)Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland, (4)Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden, (5)Agricultural Sciences, Univerisity of Helsinki, Helsinki, Finland, (6)Field Research Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden