they mix it with water and then spray it all over the fields
do you have fields near you?
( Giant bunny jumping out like a large happy tourettes rabbit, Wed 6 Jul 2005, 19:21, archived)

Not really.
Everyone house has a garden, though, so it might be from one of those.
Or they might have done the watery-spraying thing in the park across the road, but the smell's coming from the other direction...
( Comma, Wed 6 Jul 2005, 19:23, archived)