for what it is worth, here some pictures of a long term direct drilling organic farmer in Austria:
Autumn seeding after Rye
http://humus-macht-leben.com/bilder/#nanogallery/my_nanogallery/5540427311517305441
Potatoes:
after Rye with cover, some tillage & after mulching
http://humus-macht-leben.com/bilder/#nanogallery/my_nanogallery/5632159356321034513
he also grows,, now 2nd year, organic rapel
York-Th.
Autumn seeding after Rye
http://humus-macht-leben.com/bilder/#nanogallery/my_nanogallery/5540427311517305441
Potatoes:
after Rye with cover, some tillage & after mulching
http://humus-macht-leben.com/bilder/#nanogallery/my_nanogallery/5632159356321034513
he also grows,, now 2nd year, organic rapel
York-Th.