I just thought you would like to see this uneven fert application, in a park. This could be TruGreen work--they did it last year--but I don't know. Photos taken on December 10, 2012. Application must have been about 2 weeks before that. Since there were pesticide warning flags, and the clover looked a bit brown, it probably included herbicide. I measured the stripes and the two on the right in the first photo are about 11 feet apart. That is a soccer goal, with baseball field and school in the background.
Before you do a happy dance, because your competition screwed up...this is a good lesson for all of us. Easy mistake to make--and the customer is usually unhappy--sometimes this results in a retreatment. That costs money. Understand how to adjust your equipment for a perfectly even spread.