Sparkling wine the production of still wine with some noted divergence. At the vineyard, grapes are harvested early when there is still high acid levels. In areas like Australia, winemakers aim to harvest the grapes at 17 to 20° brix. Unlike still wine production, high sugar levels are not ideal and grapes destined for sparkling wine production may be harvested at higher yields. Care is taken to avoid tannins and other phenolic compounds with many premium producers still choosing to harvest by hand rather than risk mechanical harvesting which may split the berries and encourage maceration between the skins and juice. The
Quinta classification of Port vineyards in the Douro Quinta classification of Port vineyards in the Douro The Quinta classification of Port vineyards in the Douro is a system that grades the "terroir" and quality potential of vineyards in the Douro wine region to produce grapes suitable for the production of Port wine. In Portuguese, a "quinta" is a wine producing estate, which can be a winery or a vineyard. While other wine classification systems may classify the winery (such as the 1855 Bordeaux classification), the Douro quinta classification is based upon the physical characteristics of the vineyard. The classification system is run by the "Instituto dos Vinhos do