Johnsburg soils, which are on slightly depressional slopes, have less than 10 percent coarse fragments in the control section. Nixa soils, which are on ridgetops, have more than 35 percent coarse fragments in the control section. Peridge soils, which are on adjacent upland slopes, have less than 10 percent coarse fragments in the control section and do not have a fragipan. Moderately well drained. Runoff is low to high.
Permeability is moderate above the fragipan and slow within the fragipan.
These soils have a seasonally high perched water table that is within 18 to 30 inches of the soil surface from December through April. Native vegetation was forest of oak, hickory, maple, elm, and in some places shortleaf pine. The series is of large extent. Characterization of the type location by University of Arkansas Soil Characterization Laboratory.