I haven't done any seedballs with corn but I like the idea of never tilling, and I think that can be done with corn. I think you can keep the ground covered with
mulch easily with corn too.
I planted truckers favorite white dent corn in
straw mulch this year. It grew through right the mulch easily (which was just enough straw to cover the soil completely). It was a large seeded dent corn, so something with smaller kernels like a early type of flour/flint corn might not work. haven't tried those other kinds yet.
Seed balls seem unnecessary because corn is usually planted deep enough so that birds can't eat them off the ground. Also spacing is an issue with corn, so the fun of throwing the seed balls probably won't apply here. Corn in northern areas, like where I am, might not germinate in the seedballs without rain, and that might delay emergence. Early emergence seems important in the north to get it to mature grain.
Stalk thickness correlates with ear size by the way, so regardless of variety chosen, you can tell the proper spacing from that. Off topic but cool anyway!
I planted a few thousand corn plants in late May to make sure they would hit their stride in the heat of July, but they all got eaten by crows! They probably wouldn't have been protected by seedballs because the crows ripped the small seedlings out of the ground and ate the still attached kernels. I used mulch the second time and lost only a few plants to the crows, so that's what I plan to do next year.
If corn is spaced apart in rows you can add many feet of mulch in between. Squash makes it hard to mulch in between the rows. Pole beans are ok though.
Good luck! Or, if you don't believe in luck; good whatever!