On Thu, 08 Feb 2018 10:43:10 +0000, Chris Hogg wrote:

On Thu, 8 Feb 2018 02:20:28 -0800 (PST), wrote:

what is difference between rotary tiller and rotoavator

I've always thought of tillers as being fairly light-weight,
lower-powered machines, appropriate to turning over soil that's already
fairly loose and cultivated, whereas rotavators are heavier,
more powerful and better suited to opening up rough uncultivated ground.

But I think the terms are used fairly flexibly. Some are also called
'cultivators'. If you want a machine for a particular job, read the
specifications to see if it's suitable rather than just relying on what
it's called.

and remember that you need to be pretty strong to use any of them
effectively.