Sprayer PTO Water Pump

[stickfarm]

I have a 500 gallon poly tank, a tractor, a trailer, and 100 acres of hay fields. I want to fertilize with liquid fertilizer. Anyone ever use the pto pumps available at TSC for something like this. Any ideas on over all setup. I'm thinking boomless. How about regulating pressure and mixing fert inside the tank? I appreciate your time!