I send my soil samples to Mossy Oak testing service. $7.50 per sample. Put it in one of those USPS blue boxes and off it goes.
This year, I mailed my samples on a Monday at 4:30 PM and had the emailed results on Thursday afternoon.
That $7.50 can make or break a food plot.
Like someone said, the expensive seed won't grow right without the proper lime and fertilizer.
Did a soil test for my buddy. His plot had a pH of 4.2! Nothing will grow there no matter how much fertilizer you put on it.