There's a sentence in this book: Even now, the quick countryside, the odor of smoke in the bright air, the thin early moon, were beginning the change.

what would quick countryside mean here?

Same expression I see in this discussion: I just liked Knebworth for its quick countryside and loving Letchworths community

thanks in advance

upd: for the second example there's an answer form the author of that sentence:

Andrews-d 7 hours ago
I meant it ad a mix of quick access to countryside and quickly changing countryside- it's fields, then hills, then trees

nothing to do with the hedges. Now I don't think first example is related to the hedges either, but I'm still a bit confused by "live" explanation. This usage looks somewhat out of place in the text.