Iowa square bales per acre?

It obviously depends on weather, soil, size of the bales, etc, but is it fair to expect 125 fifty pound bales per acre per year on average southern iowa ground on an average year? My past experience has been significantly more, but the ground i currently farm is above average, whereas some ground ive recently acquired is not. Im jusy trying to get an idea on exactly how many acres i need.

Iowa square bales per acre?