V. vinifera
This species of grape produces over 90% of all the grapes in the world, it produces many of the most common wines such as Chardonnay, Merlot, Pinot Noir, and Sauvignon Blanc. V. vinifera is also one of the few old world species of grape and is the grape noted most frequently in the Bible (Weaver, 1976). This grape can survive on heavier soils such as clays, but it extremely sensitive to extreme climate conditions. This vine is killed at temperatures below 0 °C and must have limited rainfall as it is particularly susceptible to root rot. This species also prefers a long growing season and hot, dry summers. These factors were used to consider specific constraints and factors of this species for the multi-criteria evaluation.
Constraints
The climatic zone for this species in the GVRD was considered to be Dry maritime because of its sensitivity to root rot and disease. The climate file was reclassed to give a value of 1 to this climate zone (value 1) and a 0 to every other zone.
The soil textural class for this species is considered to be silt and clay, sand and silt, and sedimentary silt and clay. This is because of its ability to survive on heavier soils but also because it needs good drainage to remain healthy. The texture file was reclassed to give a value of 1 to this area (values: 1, 2, and 5) with every other zone being reclassed as 0.
Factors
Due to the soil textural class as well as root sensitivity, the distance from water was the largest of the three. This file was run through the Decision Wizard for this species and was given the values of:
