Names end in ept . Names end in and . Mollisol - mollis means soft in Latin. Dark grassland soils. Midwestern prairie soils are good examples of mollisols.
Names end in oll .
These are medium-aged soils that usually form under deciduous forests. Names end in alf . Ultisol - ult from Latin ultimus. These soils are essentially acidic counterparts of alfisols. They have argillic horizons and low base saturation.