Red Seal Landscape Horticulturist Practice Exam

What is a primary benefit of compost in landscape horticulture?

1. It filters contaminants from the soil

2. It improves soil structure and nutrient availability

3. It alters the soil pH to neutral

4. It repels pests from the garden

The correct answer is: It improves soil structure and nutrient availability

The primary benefit of compost in landscape horticulture lies in its ability to improve soil structure and enhance nutrient availability. Compost acts as a natural amendment that enriches the soil by adding organic matter, which helps to create a looser and more aerated structure. This improved structure promotes better root penetration and increases the soil's capacity to hold moisture, which is crucial for plant health. Additionally, compost contains a wide range of nutrients that are essential for plant growth. As it breaks down, it releases these nutrients into the soil, making them more accessible to plants. This nutrient availability is critical for promoting vibrant plant growth, improving yield, and supporting overall ecosystem health. While compost does offer several other benefits, such as helping with moisture retention and potentially aiding in the reduction of some soil-borne pathogens, its primary role in enhancing soil structure and nutrient dynamics makes it a cornerstone of sustainable landscape horticulture practices.