Texas FFA Nursery Landscape Practice Exam

What role do soil amendments play in landscape gardening?

1. Enhancing color and fragrance of blossoms

2. Improving soil fertility and structure

3. Protecting plants from harsh weather

4. Providing additional shade for plants

The correct answer is: Improving soil fertility and structure

Soil amendments play a crucial role in landscape gardening primarily by improving soil fertility and structure. They enhance the nutrient content of the soil, which is vital for plant growth. When soil amendments such as compost, manure, or peat moss are added to the soil, they can increase the availability of essential nutrients, enhance microbial activity, and improve the soil's capacity to retain moisture. In addition to improving fertility, these amendments often improve soil structure by promoting better aeration and drainage. For instance, incorporating organic matter into the soil can help create aggregates, which leads to a looser, more crumbly soil texture. This is beneficial because it allows roots to grow more easily and access nutrients and water. The other options address aspects of landscape gardening, but they do not accurately reflect the primary function of soil amendments. Enhancing the color and fragrance of blossoms, protecting plants from harsh weather, or providing additional shade are important factors in plant care and landscaping but do not pertain directly to the specific function of soil amendments.