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Snowball sampling. DP = dialogue partners; blue = DP from St. Gallen; green = DP from Thurgau; red = DP from Appenzell Innerrhoden and Appenzell Ausserrhoden; grey = supraregional working groups and informants; I = informants; (i) = integrated production (non-organic farms); (o) = organic farms; N = all farmers operating in this canton.
