BooBy Where as you are now posting question in the Pesticide forum, I have a question for you and you alone. Please no one help BooBy after all he has God Given Talent and Does not need an Education. Where as most Fertilizer companies give recommended calibration setting for application at 3 miles per hour, the average walking speed of a man pushing a spreader. Therefore "Theoretically" using the double overlap method of application (throwing the material to the previous wheel mark) and using granular Fertilizer which the spreader throws a total of eight feet, how many square feet of turf grass can the spreader fertilize in one hour traveling 3.0 mph at 100% efficiency? BTW the wheels are generally 3 feet apart on most spreaders. Hint: So use 3 feet when calculating this equation. Now this is not a trick question. In fact the answer can be used by any one, to calculate cost of application. After all we do sell our time. BooBy I am going to be out of town for Turkey day so take your time and have the answer by Friday. BTW most 5th grade math students should also be able to answer it. So when you get stumped ask your kids for help.