Salem

I"m trying to get rid of this ridge. I have been unable to lower the point shown with an arrow nor can I get any more dirt in there.

Place dirt around the surrounding area

If you can dig down on the yellow spot, and then flatten the blue tile by pressing ctrl and digging in the center of it.
If you can't then drop dirt below that ledge

Can you also not try to flatten this piece by dumping dirt on it ?

Thanks for the advice.