I want to set my planter up for no-till. All I would really need to do is add some coulters and trash wheels. What has been stopping me is figuring out how to spray the fields before I plant to kill the weeds and volunteer stuff from last season. When the fields are un-prepped, it's sometimes hard to see my tracks where I sprayed on my last pass. I miss spots and double spray other spots.

The foaming row marker kits are stupid expensive. I tried adding dies to the spayer mix but it's pretty messy and not very visible on a rough field. I've looked into inexpensive, hobby-farmer GPS systems but there are a lot of reviews that suggest they are not very good or reliable. I've also considered building a tool bar with row marker discs but that would make me run over the field an extra time just to scribe lines.

What is the best way to spray an un-disced field and get good, one-pass coverage when you can't see your tracks?