Corn is 90,000 seeds per bushel so 90,000/43560 is 2 per square foot evenly across feild

Beans is around here 2600 per lb X 60 lbs is 156,000/43560 is 3.58 per square foot evenly across feild.

I think my 1982 manual says 19 beans per sqaure on a 20 foot bean head.  Is that in the 10 foot section behind the combine?