Quote Originally Posted by swanee4597 View Post
Prior to the elevating scraper, the scraper had a knife edge and had to be pushed by a dozer. Man and machine eliminated.
They still had the cutting edge on the belly of the bowl and at times still required a dozer to push them. Many even have teeth on the cutting edge, these work especially well when scraping to break up heavy clays and hard pan like caliche. Scrapers also work better after a dozer had gone through with a multi shank scar fire ripper.