North Carolina Building Contractor License Practice Exam

What should be the maximum amount of grass blade cut in a single mowing?

1. One-third

2. One-half

3. Two-thirds

4. Three-fourths

The correct answer is: One-third

The maximum amount of grass blade that should be cut in a single mowing is ideally limited to one-third of the total height of the grass. This practice is crucial for maintaining healthy grass because cutting too much blade at once can stress the plant and hinder its ability to photosynthesize effectively. When more than one-third of the grass blade is removed, it can lead to a number of issues such as scalping, which exposes the soil and roots to excessive sunlight and can trigger weed growth. By adhering to the one-third rule, you promote a healthier lawn that can recover more efficiently after mowing, maintain better moisture levels, and reduce the risk of disease. This approach also encourages deeper root growth and overall resiliency in the grass. Following this guideline is especially beneficial during warmer times of the year, when grass may be more vulnerable to stress.