| Quote #1 When the spade sinks into gravelly ground: (4) |
Right away, Heaney dives in to talk about the difficult labor of digging.
| Quote #2 Till his straining rump among the flowerbeds (6) |
The word "straining" in this line shows us how hard his father was working in the garden. Perhaps things no longer come so easy to his dad.
| Quote #3 The coarse boot nestled on the lug, the shaft |
Here, our speaker's dad is working in the potato fields, and from the word "firmly" we can see that he has a skilled grasp on his tools.