What is the purpose of topdressing in turf management?

Topdressing is a common practice in turf management that involves spreading a thin layer of material, typically a mix of soil and organic matter, over the turf surface. The primary purpose of this practice is to improve the overall health and appearance of the grass. By applying a thin layer of soil, topdressing helps to level out uneven areas of the lawn, fill in low spots, and support the growth of grass by improving soil structure and aeration. This activity can also help retain moisture and encourage beneficial microbial activity in the soil, both of which contribute to a healthier turf.

While the other options mention beneficial aspects of turf management, they do not accurately reflect the direct purpose of topdressing. For instance, preventing weed growth and enhancing grass color are byproducts of maintaining healthy turf rather than the primary purpose of topdressing. Improving soil drainage is a goal of certain turf management practices, but it is not the specific function of topdressing itself.