FFA Horticulture CDE General Practice Exam

Lawns should be mowed so that only ___________ of the grass blade is removed at any one mowing.

1. A quarter

2. One-half

3. One-third

4. One-half or one-third, depending on need

The correct answer is: One-third

The best practice for mowing lawns is to remove no more than one-third of the grass blade’s height in a single mowing. This guideline helps maintain the health and vigor of the grass. When only one-third of the blade is cut, it allows the grass to recover more quickly, encourages deeper root growth, and reduces stress on the plant. Additionally, this practice helps prevent scalping, which can damage the grass and lead to bare patches. When grass is cut too short, it can hinder its ability to photosynthesize effectively, leading to weakened plants and increased susceptibility to diseases and pests. Maintaining the one-third rule supports overall lawn health by ensuring that adequate leaf area remains for photosynthesis and growth.