Quote Originally Posted by jason View Post
I think the primary reason that nitrates are unlikely to be the cause is the seasonality of the visibility decline.
The seasonality also corresponds with colder times of year when the golf course would be receiving more fertilizer to keep it healthy when it otherwise wouldn't be because of colder temperatures and less rain.

But this is your field of expertise. I'm just basing my theory on my observations over the past 10 years. I may be way off on this because I really don't have the knowledge that you do Jason.