You ask some very good questions.  In my opinion it is the COMBINATION of clearing the strip AND working it which really makes strip till work in most areas.

And again, the reason to and benefits from strip till will vary according to geographic location and other factors for each operation.

While we have made row cleaners to fit a standard 1 x 2 flat shank NH3 bar, we find that in most areas,unless your fields are as flat as a pool table, you need a parallel linkage to maintain consistent depth. We still have some of these row cleaners for 1 x 2 shanks in stock by the way. They float but the knife depth is often not consistent enough for strip till. Most of the strip till units on the market have a floating linkage on each row.

On slopes, unless you strip on the contour, ANY strip till machine will leave an attractive place for water to run down hill. Water takes the path of least resistance and any type  strip running up and down hill is it.

What I suggest for your scenario - corn on corn on slopes in S IA is to use our Dawn Pluribus unit just ahead of the planter by a couple hours or maybe a day or so, depending on your operation and how wet the soil is. Then follow with the planter which will firm the strip back down and reduce the danger of erosion should you get a heavy rain. I would also set both the strip till rig and the planter row cleaners to not make too wide a cleared path. In the fall especially we sometimes raise the Trashwheels up to let a bit of residue stay in the strip to reduce erosion potential.

But the best way to prevent various types of erosion is to not strip at all in the fall - just right ahead of the planter. You obviously do NOT want to do this with nh3 and a shank machine.  I think this will be the way you can run continuous corn on some slopes with minimal danger of erosion. Best to go on the contour, but I know..... 

Have you tried your Turbo till in the fall on corn stalks on slopes? If it doesn't wash why not do that and then just come in with the planter with our 1572 coulter combo with Ripple blade. It is good in heavy corn residue. There are a number of ways to handle fertilizer.

In Southern Iowa this may work without a spring full tillage pass. Question would be the erosion potential on the Turbo tilled slopes. You could try to go across the slope. The problem may be there is still a lot of corn residue mixed into the seed zone that we just can not get out with the row cleaners on the planter. Might be worth a try on a small area. Good questions. Good luck.

Jim at Dawn