What do you make the fertilizer from?
I guy I used to work with told a funny story about growing up in China.  In his school one of the chores for students was to take the poop from the outhouses (in a bucket, on a pole, between the shoulders of two students) to fields.  Being teenagers, and not liking the chore, one of them said "let's ditch it here" and they dumped it into a public outhouse.  Except one of the teachers was in the next stall, and got splashed.  They got in trouble.

Picture a communist Chinese episode of "leave it to beaver" with an environmental message ;-)

Anyway, in China ... I think I know where fertilizer comes from.