The Bone Harvest Horror

From the introduction:

For as long as anyone can remember, the village of Bone Harvest has pulled up their yearly crop of oats, barley, and wheat each fall, and each spring the fields would offer a second harvest of human bones to the farmers plows. It is believed by most that there was once a terrible battle fought between great armies in that very area, and that the splintered bits that float to the top each year are the remains of the fallen soldiers, slain in endless days of fighting.