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Wine is one of the final products made from grapes. Vine reacts to numerous environmental factors and its behavior is directly modified by winegrower actions. Terroir expression in wines ensues from those interactions during both agronomical and enological process. To identify winegrowers’ agricultural, viticultural and enological practices and to classify their effects on wines in the French region of Anjou, UMT Vinitera suggested a method based on successive surveys. This paper aims at showing how the methodology submitted by UMT Vinitera team on Anjou Village Brissac (AVB) vineyard has been transferred to the Cognac area. Actually, the Charentes vineyard is a huge Cognac firewater production area : almost 80000 hectares of vine among which only few plots (about 2000 hectares) are set aside for growing wine, named “Vin de Pays Charentais” (VPC). Technical itineraries specifically practiced on VPC vineyard had never been studied before and were quite little-known in this region First part of the work consisted in sampling 50 of nearly 800 farmers who are producing VPC in the Cognac vineyard. This wine is making barely always up a smaller part of the income than the Cognac eau-de-vie. Then a questionnaire was built to register the various cultural methods used to grow vine and wine (both for Cognac firewater and VPC) and also farmer motivations to produce specifically VPC in the area. Results of this first stage of surveys show that farm structure and grape harvest treatment are criteria that distinguish 3 groups of VPC winegrowers, with different level of technical influence on their vineyards and terroir. In a second stage of surveys, each of these groups was addressed a specific questionnaire. The objective was to segregate agronomical practices used on one hand for the VPC and on the other hand for the Cognac firewater. Afterwards, by sensible series of closed questions (dichotomous process), farmers were lead to explain why their technical itineraries change from one product to the other and from one terroir to the other. This survey so allows us to understand how a winegrower builds the decision tree which defines his specific agronomical and enological actions for the VPC
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