Landscaping License Practice Test

What is the benefit of mulching in landscaping?

1. It decreases soil moisture.

2. It controls weed growth.

3. It accelerates plant decay.

4. It increases soil acidity.

The correct answer is: It controls weed growth.

Mulching in landscaping provides several key benefits, and controlling weed growth is one of the most significant. By applying a layer of mulch on the soil surface, it effectively suppresses the germination and growth of weeds. This is achieved because the mulch blocks sunlight, which is essential for weeds to develop. Additionally, mulch helps maintain a more consistent soil temperature and retains moisture, which benefits the desirable plants growing in the area. While the other options identify potential influences in gardening and landscaping, they do not align with the primary benefits of mulch. For instance, mulch actually helps to preserve soil moisture rather than decrease it. It also does not accelerate plant decay; instead, organic mulches can gradually decompose and enrich the soil with nutrients over time. Regarding soil acidity, while some mulches can influence pH levels, they are primarily used for weed control and moisture retention. Thus, controlling weed growth is the most prominent and beneficial reason for utilizing mulch in landscaping practices.