The research was carried out in Central Mcedonia and specifically in the prefectures of Imathia, Thessaloniki, Kilkis, Pella, Pieria, Serres and Halkidiki, through questionnaires that the producers filled during personal interviews. Two different questionnaires were created for the two different groups of vine growers. In the case of organic vine producers, the whole population was studied, (40 producers), while the selection of 128 conventional vine growers was performed by the methodof Stratified Random Sampling and in particular with the neyman distribution which is considered more effective for the sample selection of agricultural holdings

Total universe/Complete enumeration

Probability: Stratified

Face-to-face interview