Mollisols Mineral soils with thick, dark colored, not highly leached surface horizon. Soils generally form under prairie vegetation. Histisols Organic soils, properties due primarily to organic matter, not mineral matter. Wet, boggy or swampy conditions. Relationships Among and Within Soil Orders Orders do not fall nicely into a sequence.
Orders occur in widely different climates and can show major profile differences.
Interpreting Soil Characteristics from Names Suborder, great group, and subgroup names can be used to supply useful information about specific soils. Humid climate, drainage better than somewhat poorly drained. A weakly developed Alfisol minimal subsoil development. The whole term implies a weakly developed Entisol-like soil due to resistance of the parent material, sand. An additional source o valuable information are county soil surveys.