The potential for surface runoff is medium or high. Permeability is moderately slow in the solum and slow or very slow in the substratum. The depth to the top of an intermittent perched water table is at 2.5 to 3.5 feet from January through May in normal years. Miamian soils are cultivated. The principal crops are corn, soybeans, wheat, oats, meadow and legume-grass mixtures.
Some areas are in trees.
The native vegetation is deciduous forest. Central and western Ohio and eastern Indiana, in MLRA 111. The Miamian series is extensive, with an area of more than 650,000 acres. Montgomery County, Ohio, 1969. A bedrock substratum phase is recognized, although it occurs within the series control section.