Red Seal Landscape Horticulturist Practice Exam

What is the main purpose of soil drainage in gardening?

1. To improve the taste of vegetables

2. To facilitate the growth of weeds

3. To prevent waterlogging that can damage roots and promote soil health

4. To enhance soil acidity

The correct answer is: To prevent waterlogging that can damage roots and promote soil health

The main purpose of soil drainage in gardening is to prevent waterlogging that can damage roots and promote soil health. Adequate drainage allows excess water to flow away from the root zone, ensuring that the roots of plants have access to the oxygen they need for healthy growth. Waterlogged soil can lead to root rot and other issues that can significantly harm plant health. Effective drainage systems help maintain optimal moisture levels, thereby supporting the overall well-being and growth of plants. While improving the taste of vegetables, facilitating weed growth, and enhancing soil acidity might have their own implications in gardening, they are not primary objectives of soil drainage. The focus of soil drainage is predominantly on maintaining proper moisture levels and preventing conditions that are detrimental to plant health.