Which statement about mowing and weed competition is supported by the material?

Which statement about mowing and weed competition is supported by the material?

• A. Weeds are unaffected by mowing
• B. Mowing increases weed vigor
• C. Proper mowing practices help turfgrasses compete for sunlight
• D. Water management is the only factor

Answer: (C)

The key idea is that mowing controls how much sunlight reaches both the turf and any weeds, so good mowing practices strengthen the turf’s ability to outcompete weeds. When mowing is done correctly, the turf canopy stays dense and uniform, which shades the soil and suppresses weed seeds and seedlings by cutting off the light they need to germinate and grow. Keeping the turf at an appropriate height also maintains strong leaf area for photosynthesis, supporting vigorous turf growth that fills gaps and leaves less room for weeds to establish. If mowing is too infrequent or the height is allowed to get too high or too low, the turf becomes less competitive, bare spots can form, and weeds can gain a foothold by capturing more light. Weed vigor isn’t typically increased by proper mowing; in fact, the opposite is true when mowing is done well, because a well-maintained turf is better at shading and crowding out weeds. Saying water management is the only factor ignores how light and canopy density, controlled by mowing, play a crucial role in weed suppression. So the statement that proper mowing practices help turfgrasses compete for sunlight best captures how mowing shapes the turf–weed dynamic.

The key idea is that mowing controls how much sunlight reaches both the turf and any weeds, so good mowing practices strengthen the turf’s ability to outcompete weeds. When mowing is done correctly, the turf canopy stays dense and uniform, which shades the soil and suppresses weed seeds and seedlings by cutting off the light they need to germinate and grow. Keeping the turf at an appropriate height also maintains strong leaf area for photosynthesis, supporting vigorous turf growth that fills gaps and leaves less room for weeds to establish. If mowing is too infrequent or the height is allowed to get too high or too low, the turf becomes less competitive, bare spots can form, and weeds can gain a foothold by capturing more light.

Weed vigor isn’t typically increased by proper mowing; in fact, the opposite is true when mowing is done well, because a well-maintained turf is better at shading and crowding out weeds. Saying water management is the only factor ignores how light and canopy density, controlled by mowing, play a crucial role in weed suppression. So the statement that proper mowing practices help turfgrasses compete for sunlight best captures how mowing shapes the turf–weed dynamic.