?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Darnhofer%2C+Ika&rft.aulast=Darnhofer&rft.aufirst=Ika&rft.date=2006&rft.title=Organic+farming+between+professionalisation+and+conventionalisation+-+The+need+for+a+more+discerning+view+of+farmer+practices&rft.genre=proceeding