Nothing magic about it. It's just fertilizer with lime mixed in. Lime is cheap.
Anything with the word 'premium' in it isn't

For example:
a fourty pound bag is $28.00 (but they throw the shipping in for free)
they suggest 8-10 bags per acre


http://www.biggameproshop.com/mossyoak-biologic.htm

Tractor Supply Store has lime for $5 a 50 pound bag
and garden fertilizer was 8 bucks a 40 pound bag (if I remember correctly)