Sorry not to have answered this sooner (this is the busiest time in the vineyards - and it has been a heck of a season so far!)...
If planted under DOC/DOCG yield is controlled. If planted for yourself you could take more wine per vine (at the cost of quality), but here are the facts:
1 acre (2.5 acres to a Ha) of mid age vines (15-30) would give you between 2,000 and 4,000 botles depending upon the growing season and fruiting variables that we experience. Perhaps you can translate that as 1-3 bottles per vine. Younger vines (once aged 4 and over) are more vigerous (and as we know to our cost this year, take a lot more work to keep under control!) - so after the 3 year wait you would get more not less grapes in early years.
Our 1 Ha of very tightly controlled moscato d'asti DOCG produced 8,000 bottles last year.
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