The wheels are mechanically attached to a mechanism that has tines upon an axel that throw clumps of manure into a barren field.
Thats it. Nothing more than poop being thrown out of the back of a wagon.
I went to my uncles farm in Eyota. He had an old honeywagon sitting in the side yard. Oh boy. Did that ever stink. No amount of varnish could ever disguise what that piece of machinery was made for... I hope some city slicker comes along and thinks its some sort of collectable... and puts it in the city center of Rochester.