What does the term "dethatch" refer to in turfgrass management?

The term "dethatch" in turfgrass management refers specifically to the process of removing accumulated organic matter, particularly thatch, which is a layer of dead grass, roots, and other organic debris that builds up between the soil surface and the grass blades. Thatch can hinder the movement of water, nutrients, and air to the grass roots, leading to poor turf health and increased susceptibility to diseases and pests.

Dethatching is typically necessary when the thatch layer becomes too thick, generally more than half an inch, as it can impede proper grass growth and turf quality. By dethatching, turf managers help promote a healthier environment for grass, allowing better access to essential resources. This process can be achieved through mechanical dethatchers or rakes that physically remove the excess material.

The other choices relate to different aspects of turf management. Creating new sod involves installing new grass, fertilizing the soil pertains to adding nutrients to enhance growth, and watering the grass is essential for maintaining moisture; however, none of these options address the specific issue of managing thatch accumulation.