Fig. 1. Distribution of soil series: Cecil (fine, kaolinitic, thermic Typic Kanhapludults), Altavista (fine-loamy, mixed, semiactive, thermic Aquic Hapludults), Helena (fine, mixed, semiactive, thermic Aquic Hapludults), and Sedgefield (fine, mixed, active, thermic, Aquultic Hapludalfs) which are labeled on the map. Shades of gray represent drainage classes (well-drained, moderately, well-drained, and poorly drained) for each field (see legend on map). Aerated fields were Fields 2, 5, and 6.