In article ,
says...

http://dotearth.blogs.nytimes.com/20...o-roles-for-in
dustry-and-organics-in-agriculture/

Someone once said you can't have one without the other.

For awhile.

In the farther short term and the long run, barring some new and non-
oil/non-carbon/non-natural gas based technologies arising to drive farm
tools and produce fertilizer etc., conventional ag. is a dead end.

The potential yield by using permaculture methods outstrips anything so-
called conventional agriculture offers.