What is one reason superintendents might retain some thatch on the golf course?

Retaining some thatch on a golf course can indeed help regulate summer heat effects. Thatch, which is a layer of dead and living plant material that accumulates on the soil surface, acts as a thermal insulator. By maintaining a certain level of thatch, superintendents can help protect the grass roots from extreme temperatures, both hot and cold. During the summer months, this insulating effect can mitigate the stress placed on the turf by intense heat, contributing to overall turf health and resilience.

In addition, while there are advantages to thatch in terms of moisture retention and potential nutrient storage, the primary focus on regulating heat underscores its role in mitigating the impact of summer temperatures on the grass, ensuring that the course maintains playability and aesthetics even in challenging weather conditions.