I removed the depth guide from my 20" 2 bottom plow so I could make it go deeper last winter. My reason was not to bring the sane up but to burry organics deep into the sandy soil I think this fall I'm going to try and turn a 10" layer of straw and manure into the garden plot. This summer I had fewer weeds and didn't have to water near as much, but the top still packed hard from watering Still the crops were an improvement over previous years.