This whole 'exhaust in the airseeder' thing just makes me sit there and shake my head.  I mean, at least the snake oil guys ARE giving you a little something when you pay for their overpriced 'fertilizer.'  I can't believe anyone would have the nerve to even TRY to sell this crap. 

I'm a member of a couple organizations who I would love to see them try to 'sell' this too.  By the time they escaped, it wouldn't be pretty, but it sure would be entertaining to listen to.