I'm going to get started with my "Winterizer" in Indiana on Sat. I bought 3 ton Bulk Urea (First time trying this) and I also bought 1 bag Anderson bag Urea to compare the particle size between the two. I will be using my Perma Green Magnum and add 50lbs. to see how many sg ft I can get. Is it fair to think setting "12'' should get me 1 pound of N per1000M Do I need 2lbs Urea per 1000M to = 1lb N If so then 50 lb should get me 25000 sg ft Thanks in advance!!!