Viticulture Flashcards
Viticulture definition
The art and science of vine growing
Factors of production
Location/geography
climate
topography/aspect
soil
grape varieties planted
viticultural practices
vinification practices
harvest
yearly weather/vintage variation
terroir
Regional wine laws
Historical background
between which parallels do most grape varieties thrive?
30-50 degree latitude is where most grapes thrive
these areas have long frost free periods that allow them to develop
Climate from large to small
Macroclimate- entire wine region
Mesoclimate- particular vineyard
Microclimate- specific row or vine
Describe Continental climate
Strong annual variation in temperature due to the lack of proximity to significant bodies of water
Hotter summers than in maritime, often with cold winter temperatures that can be extreme
Describe Maritime climate
climate influenced by large body of water such as sea or ocean
marked by mild temperatures but also involving fluctuations from year to year causing vintage variation
Describe Mediterranean climate
Summers are hot and dry, aside from the immediate coastal areas. Along the coasts summers are mild due to proximity to cold water currents.
Storms can also be a consequence
Describe High desert climate
Summers are generally hot and dry. Day time temperatures are high, but dramatic drops are often experienced overnight
4 different ways you can further describe or define the different climate definitions…
cool
moderate
warm
hot
Important factors that affect climate
diurnal shifts
sunshine hours
threats (Frost/freeze, hail, strong winds)
What are Diurnal Shifts, and why these are important?
Difference between daytime high and night time low
(this is important for the ripening of grapes and balancing sugar/acidity)
Example of Climate moderators and how they influence
Bodies of water (can cool or warm a region)
mountains (can protect from surrounding weather or climate influences)
Altitude/elevation (every meter you go up, temperature drops by about a degree. In hot wine growing regions, higher elevation can be better)
Wind (can cool or lend drier air helping prevent mold or rot)
What is the Rain shadow effect?
Dry area on one side of a mountain opposite the wind, rain and generally poor weather
steeper hillsides vs valley floor
Steep hillsides- better drainage of soil, less fertile due to erosion, lower chance of frost, harder to maintain and harvest
Valley floor- pooling of air, susceptible to frost, can be overly fertile
What is aspect?
Which way the vineyards face, if you face to the sun it is warmer, away is cooler. Both can be desirable depending of region
Important properties of various soil types
Drainage of water
water retention
sun reflection