Researchers have found that clipping clippings do not contribute to thatch.

• A. Not enough evidence
• B. True
• C. False
• D. It depends on grass type

Answer: (B)

The main idea is that leaving grass clippings on the lawn does not add to thatch. Thatch is a dense layer of dead material that builds up when organic matter accumulates faster than it decomposes. Clippings, when returned to the lawn, typically decompose relatively quickly and release nutrients back into the soil, so they don’t contribute to thatch. In fact, they can help turf health by adding organic matter and reducing the need for additional fertilizers. Research findings indicating that clipping clippings do not contribute to thatch align with this understanding. The other options don’t fit as well: there is evidence to support the claim, and while there can be unusual situations, the general conclusion reported is that clipping residues do not build thatch.