The Growing Environment Flashcards
What degrees of latitude to grapes grow between generally?
30° and 50° either side of the equator
Why do large bodies of water impact nearby vineyards?
Water heats up and cools down more slowly than dry land
The warmth of the body of water keeps the local area warmer
Cooler summers, milder winters
What can affect vineyard temperatures in coastal regions?
Ocean currents
What causes El Niño?
When warm water in the pacific moves east along the equator towards the Carribean, the Eastern Pacific becomes warmer than average
What happens in El Niño?
High levels of rainfall & risk of hurricanes i California and South America
Warmer temps & drier conditions to Washington & Oregon
Brings warmer temps & drought conditions to western side of Pacific (Australia)
What causes La Niña?
When the eastern Pacific is cooler than average
What is the effect of La Niña?
Drier, warmer conditions in California & South America
Cooler, wetter conditions in Washington & Oregon
Cooler, wetter conditions in western side of Pacific (Australia)
What is the Zonda in Mendoza?
A warm air
What does a wind that has travelled over hot land masses bring?
Warm air
Why may you plant trees around a vineyard?
To protect from damaging winds
Why would sandy soils be adventageous in a cool climate area?
Sandy soils are free draining and therefore heat up quicker than damp soils
Rising soil temperatures stimulate budburst and growth
Why would light coloured soils be beneficial in cool & cloudy climates?
They reflect some energy from solar radiation, helping to increase photosynthesis & grale ripening in late ripening varieties
What is dense mist?
Fog
How might regular mist & fog be beneficial to a vineyard in a warm area
It can slow down sugar accumulation and acid degredation
What is a diurnal range?
The difference between daytime & nighttime temperatures
Why would a high diurnal range be favourable in a warm or hot climate area?
Cool nighttime temperatures can slow acid respiration
Can be beneficial for anthocyanin formation
Why would a low diurnal range be favourable in cool or moderate climates?
Nighttime temperatures still allow ripening
How much water does a vine need per year in a cool and warm region?
Cool - 500mm
Warm - 750mm
What is transpiration?
Transpiration is when water vapour diffuses out of the stomata on the underside of the leaves. This loss of water causes water to be pulled upwards from the soil, through the roots and the above ground parts of the vine.
Why are waterlogged soils harmful to the vine?
They reduce oxygen availability to the roots