>>>Good stuff on Fairy Rings here. "The good news is that fairy ring fungi don't actually infect turfgrass like brown patch, dollar spot, etc. The bad news is that they leave behind a coating on the soil particles that renders the soil hydrophobic (repels water) and may ultimately kill the turf. This is important to know when it comes to controlling the symptoms caused by fairy rings."
Pictures in our Canola, April 2013
What's wrong with our lawn - Annual White Grub Larva