Not P but Moby-Dick (21)

[Mike Jing]

Also from Chapter 40:

LONG-ISLAND SAILOR.
Well, well, ye sulkies, there’s plenty more of us. Hoe corn when you may,
say I. All legs go to harvest soon. Ah! here comes the music; now for it!

The Norton Critical Edition says this is "A call to a hoedown, or a square
dance." Does "hoe corn" have anything to do with hoedown?

Also, what does "All legs go to harvest soon" mean here?