Nicking and slicing neatly, heaving sodsOver his shoulder, going down and downFor the good turf. (22-24)
It's almost like the grandfather is digging himself deeper and deeper into the earth – getting close to the heart of it.
The cold smell of potato mould, the squelch and slapof soggy peat, (25-26)
Our speaker remembers the smells and sounds of nature very clearly and powerfully, which makes his love of it all the more understandable.