Some were planted under leaves and some under wood chips.
Pro's of using leaves
Easy to mound up
Easy to harvest (also easy to furtle about for early tubers as they became large enough)
Tubers were quite clean
Cons of leaves
In windy conditions leaves needed holding down with chicken wire until the canopy had grown
More slug damage than normal
Pros of using wood chips
Easy to mound up
Relatively easy to furtle (compared to soil)
Easy to harvest
Cons of wood chips
More scab
Chips mixing with soil as tubers were lifted
(Starting with better decomposed chippings would probably reduce the downsides).
