Pino,
If the soil is removed in early spring there may or may not be initial root formation (swelling). It should not be a problem because the low soil temperatures and lack of moisture would allow only minimal growth.

Andy,
You're welcome,
Here's another book by the same author...
http://www.rivendellvillage.org/Natural-Way-Of-Farming-Masanobu-Fukuoka-Green-Philosophy.pdf
With a little planning its Gardening without most of the work...

Pete, Thanks for sharing this nice books on natural farming!

I have been striving to do this in my own way for many years now but with limited success. 
It seems disease/pest pressures are increasing and making it harder.  Whether it is the weather in the North East (humid and wet for too many and long periods) or whether as stated in the book "That natural farming has yet to gain wide acceptance shows just how mortally nature has been afflicted by man’s tampering".

I assume (hope) that dry hot areas like parts of California/Arizona have much more success.   

Pete,
Thanks for the natural farming links.  I read through most of the One Straw Revolution pdf.  Interesting read.  It sounds a lot like a version of permaculture.

Pino,
I too have been attempting to do more "natural" gardening, but I also find that there is quite a bit of disease and pest pressure.  I don't spray anything (non-organic anyway), but I do seem to have to take some measures to ensure I get something from the garden.  From what I've heard, it takes a few years to establish a healthy ecosystem where the gardening can be more carefree.  At the moment, I'm not totally convinced I can get by with a pure natural or permaculture approach.  If I don't do something to protect by berries, they are picked off by either bugs or birds.  I'm pretty sure that the natural approach would be to not grow the varieties I'm growing or accept massive pilfering by the nature, but that would totally not fly in my household of voracious berry eaters.

Johny
IMO - Natural farming for personal needs is something everyone can and should do to enjoy fresh real organic products. 
Of course you need to factor in that pests will get x% so make sure to grow enough for all. 

Organic commercially in my area is very difficult some people claim success with some crops (mostly veggies, berries).  Attributing it to lots of hard work and willingness to compromise on the picture perfect quality consumers expect.