This:
http://www.homedepot.com/p/Honda-9-...ng-Gas-Mini-Tiller-Cultivator-FG110/207081009
plus this:
http://www.homedepot.com/p/Honda-Di...Tiller-and-Cultivator-06726-V25-010/203768178
Equals 760 holes dug in one season in rocky NE soil
Wouldn't an earth auger be more efficient?
If you've got a buddy you can remove 18 inch holes at a time.