Tim

It is not that notill will not work everywhere, I believe it is more like notill will not fit everyone's system. It is very difficult to notill a monoculture crop. After a couple years the lack of diversity will begin to present all kinds of problem for notill. Tillage can sometimes temporarily help these problems but it is not a long term fix.

I believe that if you have a diverse enough crop rotation, there is no where in the world that notill will not work.