[1] Hungarian Res Inst Organ Agr OMKi, H-1033 Budapest, Hungary
[2] Res Inst Organ Agr FiBL, Dept Livestock Sci, CH-5070 Frick, Switzerland
[3] Mediterranean Agron Inst Bari CIHEAM Bari, I-70010 Valenzano, Italy
[4] Univ Copenhagen KU, Dept Plant & Environm Sci, DK-1871 Frederiksberg, Denmark
[5] Scotlands Rural Coll SRUC, Dept Anim & Vet Sci, Roslin Inst Bldg, Easter Bush EH25 9RG, Scotland
[6] Hungarian Univ Agr & Life Sci MATE, Inst Math & Basic Sci, H-1118 Budapest, Hungary
[7] Int Federat Organ Agr Movements IFOAM Organ Europ, B-1000 Brussels, Belgium