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The French "Coteaux du Layon" Appellation of Origin has built its Jarne on the production of sweet white wines. A network of experimental plots, based on the "terroir" concept, was established in 1990; it allows for the follow-up of the overripening behaviour of the grapes in relation with the agroviticultural parameters.
In viticoltura, la comprensione dell'influenza della temperatura dell'aria sulla dinamica della maturazione assume importante rilievo in relazione all' ottimizzazione dell' epoca di raccolta da cui dipende in modo significativo la qualità del prodotto finale.
An integrated terroir characterization is currently realized in the French northern vineyard: "Anjou". The concept of Basic Terroir Unit (B.T.U.) and its associated ground model "Rock, Alteration, Alterite" are used in this characterization. This work is coupled to a viticultural survey, based on parcels.