Ray Kinsella is a novice Iowa farmer who lives with his wife Annie and daughter Karin. In the opening narration, Ray explains how he had a troubled relationship with his father, John Kinsella, who had been a devoted baseball fan. While walking through his cornfield one evening, Ray hears a voice whispering, "If you build it, he will come." Ray continues hearing the voice before finally seeing a vision of a baseball diamond in his field. Annie is skeptical of his vision, but she allows Ray to plow the corn under in order to build a baseball field.
Ray's brother-in-law, Mark, cannot see the baseball players and warns Ray that he will go bankrupt unless he replants his crops. While in the field, Ray hears the voice again, this time urging him to "ease his pain."
Is it ever mentioned what kind of corn Ray grows?
The largest baseball field is less than 3 acres... while the average size of a farm closer to 400 acres and there a five different types of corn. Even if we consider rotation farming practices, re-purposing three acres would not be enough to cause the farm to go bankrupt.