Decayed grass blades and stems—known as thatch ... Tow-Behind Dethatchers Tow-behind dethatchers latch on to tractors or riding lawn mowers and use metal tines to pull up thatch as you drive ...

tow-behind dethatcher or a lawn mower dethatcher blade that performs the same function as a thatch rake, only without manual labor. Once the thatch is loosened, you will need to rake away the debris.