Cultivating (Carrier)to only 2-3" max, and subsoiling to no more than eight (Shakerator with winged share). Having min-tilled 90% of everything for the last five years we are finding the soil works much better and it is much easier to incorporate crop residues. Land that has been min-tilled for 7 or 8 years and has had most of the straw incorporated has a peat like surface. I think we may well be able to do away with any cultivations just harrowing to even out the trash then direct drill.
Yields are higher but they probably would be anyway due to stobs etc, but in a dry year we do not suffer as muh as we did when ploughing. The soil structure is much firmer, but not compacted. (with the exception of some of our sandy/silts which set like concrete and require regular loosening). Crop establishment is far more even, so long as you get the residue evenly spread.