In The Vineyard Flashcards
(45 cards)
What does the skin of the grape contribute to winemaking?
Color, tannins, flavor
What does the pulp of the grape contribute to winemaking?
Sugar, acid level, water and flavors
What does the stem and seeds of the grape contribute to winemaking?
Tannins
Which kind of grape has higher levels of color and tannins in the skin?
Black grapes
What does a vine require to grow?
Warmth Sunlight Water Nutrients CO2
What are the different stages of grape fermentation?
Flowering
Fruit Set
Veraison
Ripening
What is “extra” ripening”
The process of leaving grapes on the vine past the point when they might normally be harvested so the sugars and acids are concentrated in the grapes - often used to make sweet wine
What is botrytis/noble rot?
A fungus that can grown on grapes making tiny holes in the skin causing water to evaporate.
This has the effect of concentrating acids, sugars and flavors in grapes which are then used to make sweet wine
Why would a winemaker allow grapes to remain on the vine in the winter and freeze?
To freeze the water in the grapes, concentrating acids, sugars and flavors.
wine made from frozen grapes on the vine is called Icewine/Eiswein
What is the temperature range of cool grape growing climates?
62F or below (16.5C)
What is the temperature range of moderate grape growing climates?
62F - 65F (16.5-18.5C)
What is the temperature range of warm grape growing climates?
65F - 70F (18.5-21C)
What changes occur in grapes when they ripen?
Grapes swell with water
Acidity drops
Sugar increases
Flavors develop
How do the flavors of white grapes change as they ripen?
Flavors develop from green (unripe?) fruit to stone and/or tropical fruit
How to the flavors of black grapes change as the ripen?
Flavors develop from fresh to cooked fruit
What latitudes are most wine-growing regions located between?
30-50 degrees north or south of the equator
How does altitude influence growing conditions?
Temperature drops with altitude
How does proximity to seas influence growing conditions?
Ocean currents can cool warm regions or warm cool regions
How does proximity to rivers influence growing conditions?
Rivers reflect sunlight, helping grapes to ripen
They can also retain warmth in cooler seasons providing warmth to vineyards
How do clouds, fog and mist affect growing conditions?
Clouds, fog and mist can protect vineyards from sunlight and moderate warmer climates
How does proximity to mountains affect growing conditions?
Mountains can protect growing regions from clouds, rain and cold winds
How does slope and aspect affect growing conditions?
In moderate and cool climates vineyards sloped TOWARDS the equator receive more heat and light
How does soil affect growing conditions?
Soil needs to store enough water and nutrients to provide for the vine.
Stony soils can also absorb heat and warm a vineyard
What weather extremes can cause problems for grape growers?
Drought Temperature Sunlight Frost Hail Rain