turf
an accumulation of partially decayed vegetation or organic matter, unique to bogs and moors, and harvestable as fuel
lug
something (such as a handle) that projects like an ear
a ridge (as on the bottom of a shoe) to increase traction
The word "lug" here likely refers to the jutting blade of the shovel.
levered (to lever)
to pry, raise, or move with or as if with a lever
bog
wet muddy ground too soft to support a heavy body; a marshland
sods (sod)
a section of grass-covered surface soil held together by matted roots; turf
peat
also known as turf; an accumulation of partially decayed vegetation or organic matter, unique to bogs and moors, and harvestable as fuel
nicking (to nick)
to cut into or wound slightly
