Definition of Performance in wine
Quantity of grapes harvested per hectare. In AOC, the average yield is limited on the proposal of the appellation syndicate, validated by the Inao. The use of high-performance plant material (especially clones) and better control of vine diseases have increased yields. This is not without consequences on the quality of the wines (dilution) and on the state of the market (too much wine). We must not over-simplify: low yields are not synonymous with quality, and it is often in years with generous harvests that we find the greatest vintages (1982 and 1986 in Bordeaux, 1996 in Champagne, 1990 and 2005 in Burgundy...).