In 1995, a liming study was initiated at the Armstrong Farm in what had been a continuous corn production system where acid soil had developed from nitrogen (N) fertilizer use. In 2003, the experimental area was divided into thirds. A corn-soybean rotation occupies two-thirds of the area and continuous corn continues to occupy the remaining third. The goals of this experiment are to determine corn crop and soil responses to liming and crop rotation effects on N management.