Texas FFA Nursery Landscape Practice Exam

What is one advantage of using modern horticultural fabrics over black polyethylene film in landscaping?

1. Prevent moisture from penetrating too deeply

2. Make a better base for rock mulch

3. Completely control weeds

4. Allow exchange of gases between soil and air

The correct answer is: Allow exchange of gases between soil and air

Using modern horticultural fabrics provides the significant advantage of allowing for the exchange of gases between the soil and the air. This property is crucial for maintaining soil health and supporting plant growth, as it enables essential processes such as respiration and nutrient uptake. Unlike black polyethylene film, which is a solid barrier that can trap moisture and restrict air movement, horticultural fabrics are designed to be permeable. This means that while they inhibit weed growth effectively, they still permit water, air, and even some microbial activity to occur, fostering a healthier environment for plant roots. This exchange of gases is essential for preventing anaerobic conditions in the soil, which can lead to root rot and other issues detrimental to plant health. Horticultural fabrics strike a balance by providing weed control while also promoting the necessary conditions for thriving plants.