Certified Sommelier Practice Exam

What is characteristic of Nelson's soil in wine production?

1. Clay soil

2. Stony, well-drained soil

3. Sandy soil

4. Loamy soil

The correct answer is: Stony, well-drained soil

Nelson, a wine region located at the northern tip of New Zealand's South Island, is known for its distinctive stony, well-drained soil. This type of soil is particularly advantageous for viticulture as it allows for efficient drainage, which is essential for grapevines. Well-drained soils prevent waterlogging and promote healthy root development, allowing the vines to establish themselves deeply and respond well to dry conditions. Additionally, the stony composition of the soil aids in thermal regulation, as stones can absorb heat during the day and release it at night, thus providing a consistent temperature that is beneficial for fruit ripening. This encourages the development of concentrated flavors in the grapes. The unique combination of well-draining and temperature-regulating characteristics in Nelson's soil contributes significantly to the quality and expression of the wines produced in the region. In contrast, while clay soil retains moisture, it can lead to over-saturation, which is not ideal for grapevines. Sandy soils, although also well-drained, may not retain sufficient nutrients for the vines, leading to less flavorful grapes. Loamy soils, while beneficial in terms of nutrient retention and drainage, do not possess the same stony aspects that define the unique terroir of the Nelson region. Thus