I always get grief when I bring this up but no-till has changed the whole "landscape" by reducing soil loss much more than reduced till or conservation tillage and even more than strip till. You need to remember, no-till has only been around since '98 but has a large penetration in the market - especially corn (no time to look that up).
Monsanto is an evil company and that sucks but the fact is soil loss on no-till is about 50%f of strip till - compare no-till soil loss at 1.14 tons/acre/year to conventional till at 12 tons/acre/year!
Cellulosic ethanol is a worry too, because with no-till especially the more residue you remove from a field the less protection it has. Compared to leaving 100% of corn residue, removing 100% increases erosion 236%
Iowa study
In case someone doesn't get it, "no-till" means no cultivation to prepare the seedbed or eliminate weed competition, instead it uses herbicide tolerant crops and Round-up.