Having a bit of a rethink about the task of digging up loads of old compacted lawns to turn them into veggie gardens. The ground is very hard and not suitable for a rotary-hoe. However, heavy duty rotary-hoe's are available with a lot more grunt and they are powered - i.e. the wheels have a forward and reverse gear box.
Apparently one of these beasties can do 1ha in a day and a small or older person can use them easily.
We are going to need a walking tractor!