Yeah, light land. Or maybe more accurately, calcium dominated. So using lots of sulphur to try and strip out calcium and restore the ca:mg balance a bit. I don't believe in magic much, but I think the kinsey approach has some things to recommend it, so long as you don't get lost in the micronutrients end of things. The closer I can push the ca:mg balance towards ideal(within economic reason), the better the soil structure. And in my view, that bit is important for the no-tilling.
All this being said, the crops seem to like it too. If fert prices and practicality weren't the object, I'd probs wind up using ASN as main niter source, bag of kieserite for mg and S, SOP for potash and DAP at drilling, winding up with almost as much sulphur as nitrogen going out.
Basically, I get away with a lot less N if I can pump up potash sulfur and mg on the light land, and anything I can do to get Om levels up without adding to ca:mg imbalance, yahoo. The cover cropping should slowly help with this and help bind and hold some of that sulphur mg and potash rather than having it wash out in winter.