Thanks

John, might I suggest that in this instance 'turf' does not mean 'grass' but peat and heather. This is the old method used by crofters in both Ireland and Scotland to make 'lazy beds' for growing food crops on. The reason for doing this is because the peaty soil was poor in nutrients and very wet; water would drain away along the trenches. Compost, animal manure or seaweed would be spread along the top of the beds as a fertiliser. You can still see the remenants of these lazy beds in the Western Isles and they would have been the origin of the current craze for raised beds.

Useful information, The poor soil and drainage reason makes lots of sénse. Although where I saw this method being used as a younglad it was in areas NotBog but very fertile and good grassland...I have often wondered if it were being used to save hard handwork skinning the turf hence being called Lazy Mans Gardening or if there are other reasons? Any comments or tips accepted as helpful
Thanks

Thanks David
It all makes séance ie the drainage and poor soil etc
Appreciate your useful comments.
Jk

It's the historic system called ridge and furrow (England) or run rig (Scotland)
Pre-dates the agricultural revolution and remains of the system can be seen dotted about the countryside- Leicestershire has some great examples that can still be seen in the landscape 500+ years later on.