Our family used to live in farmland in the center of 100 acres of cornfield. The fact that she was found about 30 rows in from the nearest road, tells me this was
a.) someone who had no knowledge of harvest (all farmers are out there this time of year so it's no surprise at all that she'd be found) or, someone who just didn't care and
b.) it was a convenience dump (apologies if that sounds insensitive) without any real forethought (oh look, there's a cornfield, I'll leave her there, no one will see her due to the thick corn stalks).
There was no real effort to conceal her, beyond leaving her in a cornfield. I suspect this person is young, kind of stupid, and likely has a criminal history for lesser junk. Likely a druggie.
moo.