The growing environment

Question 1

At what temperature does winter freeze occur?`

Answer 1

Below -20ºC

Question 2

Budburst is stimulate at what temperature?

Answer 2

10ºC or over

Question 3

What temperature is ideal for even flowering?

Answer 3

17ºC or over

Question 4

What is the realistic level of sunshine that a vine needs to photosynthesise?

Answer 4

At least 1/3rd full sunshine.

Question 5

What are some effects of direct sunlight on grapes? (4)

Answer 5

• Reduction of Methoxypyrazines
• Acid Levels fall
• Anthocyanin development increases in black grapes
• Promotes tannin polymerisation in black grapes

Question 6

What effect does the earths curvature have on sunlight?

Answer 6

Areas closer to the equator receive more solar radiation, which is also less diffused, as the light has to travel through less atmosphere to reach the ground.

Question 7

What effect does the earths curvature have on the growing season?

Answer 7

Regions at higher latitudes have longer days in the summer (ie the growing season) increasing the amount of sun exposure and therefore photosynthesis.