I just bought the probe from U-Spray, after reading about the importance of proper Ph for a healthy lawn. I put in blue grass sod last spring. I live in the Chicago suburbs. In Aug and Sept, a large area of the sod began going brown. Not totally dead, but very weak looking. I aerated and increased watering but it didn't help. Now I am guessing it is a fungus problem. I checked the Ph using the new probe. The reading was just a bit under 8. Based on the article on your web site, I have alkaline soil, which requires treatment with sulfur. Before I go ahead, is alkaline soil consistent with the lawn problem I have described?