;6) CEEC: Tyburski & Zakowska-Biemans 2003; EE: Vetemaa & Milkk , EE: Vetemaa & Milkk EE: Vetemaa & Milkk 2012 LV: Zarina 2009 LT: Kaspersen et al. 2004 PL: Metera 2005 SE: Lampkin et al. 1999. * In Sweden, the regulation for organic farming is not detailed and is limited to the requirement of EU regulations, Kilcher et al. 2011.
7 All: The basic rules of organic farming are uniform in all European Union member states. From January 1st, 2009 the new EU Organic Farming Regulations (EC) No 834/2007 and (EC) No 889/2008 came into effect (Vetemaa & Milkk 2012).
; Moschitz et al. Estonian Plant Production Inspectorate; Moschitz et al. 2004; Moschitz et al. 2004 SE: Kilcher et al. 2011.
9) EE: personal communication Eve Ader, Estonian Plant Production Inspectorate, LV: personal communication, Leviana Sturite, State Stende Cereals Breeding Institute, Latvia; unpublished observation, Latvian Organic Agriculture Association, PL: personal communication, Josef Tyburski, Mazury University, Olsztyn, Poland; Moschitz et al. 2004, SE: Källander 2000/2010.