I'd agree a tad with Drew. The last field I hunted produced 1 buckle for me and some odds. The plowed corn field was not the greatest as some of the old stalks were still there and the others that were pulled up made for really uneven terrain to swing the coil. Someone still managed a nice lock, there were a few ox knobs, sweet two center, and a few IH (1860 and 1868). Just didn't fair well enough for me. That field obvi had a lot of activity judging by what you dug up including the ceramics.