Which vine training system is most commonly used in Greek vineyards?

The spur pruned and head trained system is most commonly used in Greek vineyards due to several climatic and practical reasons. Greece's traditional vineyard practices often involve this method because it is well-suited to the hot and dry growing conditions prevalent in many regions.

This training system allows for good airflow and sunlight penetration, which helps to reduce the risk of disease and allows the grapes to ripen effectively. The head training aspect involves keeping the vine at a lower height, making it easier to manage in terms of harvesting and maintenance. Additionally, this method is compatible with the indigenous grape varieties traditionally grown in Greece, which often have specific needs that are met well by this training approach.

In contrast, the other methods mentioned may not be as well adapted to the local conditions or the particular grape varieties used in Greek vineyards. For example, Guyot might be more commonly associated with other wine regions that have different growing conditions and vineyard management practices. Cordon training, while effective in certain applications, may not provide the same benefits as spur pruning and head training in the context of Greece. Sylvoz training is also less common in the region as it is typically more suited to regions with different climatic factors.