They said annhydrous ammonia.
This stuff is all OVER my area!!
The locals drive down the roads with two - TWO!! - big white tanks of it behind their pickups.
Then they'll hook one to a tractor and drag it all over a field.
Should I worry that the ground is going to explode in the field across from my house?
While it CAN be dangerous; it doesn't appear to be flammable or explosive.
http://www.extension.umn.edu/distribution/cropsystems/dc2326.html