Posted: 16/06/2016 at 18:18
There was a raised bed trial mentioned on the radio, and each bed differed in the amount it was dug. One end of the spectrum: no dig, the other end turned. They have been monitoring and growing in the beds for years, and the no dig bed is the most prolific.
I have done much digging in our garden really to see where the chalk starts, and to pull out rubbish that has been dumped there over the years. I just pulled out a mattress, and loads of other detritus. All for the benefit of a hedge.
I realise in doing so, I've stripped out most of the top soil, and plant matter. So I've added loads of horse manure and a bit of left over sharp sand. On chalk the living matter quickly disappears. And I wish I'd planted some green manures in sections of the garden that I've already worked. Something like comfrey, there are other options.
Not that I know much about soil, but I do find it fascinating. Especially as mentioned above how the worms just arrive.
Not sure if this was the trial, but might be of interest: http://www.charlesdowding.co.uk/no-dig-growing/lower-farm/