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the low available water capacity and the resulting hazards of droughtiness and soil blowing. Rifle Series The Rifle series consists of nearly level, very poorly drained soils forming in organic soil material. These soils are in bogs in both sandy outwash plains and moraines. In a representative profile the surface layer is very dark brown mucky peat about eight inches thick. The subsurface and underlying material are dark yellowish-brown mucky peat. Permeability is moderately rapid and the available water capacity is very high. The organic matter content is very high. The available nitrogen is high and the phosphorus and potassium are low. The water table is at or near the surface unless the soils have been drained. Most areas of Rifle soils are under native vegetation. The major limitations are the hazards of wetness, ponding, and unseasonable frost. Seeleyville Series The Seeleyville series consists of level, very poorly drained soils formed in organic soil material. These soils are in bogs in the sandy outwash plains and the till plains. In a representative profile the surface layer is black muck to a depth of 57 inches. The underlying layers are black or very dark brown muck. Permeability is moderately rapid, and the available water capacity is very high. The supply of available nitrogen is high and phosphorus and potassium is low. These soils have a water table depth at or near the surface, unless drained. Some areas of the Seeleyville series are pastured or cropped, but most are relatively untouched. The major limitations are the hazards of wetness, flooding or ponding, and unseasonable frost. Zimmerman Series The Zimmerman soil series consists of nearly level to steep excessively drained soils formed in outwash sands. These soils are in broad outwash areas and on narrow escarpments adjacent to drainageways. They also occupy large depressions in the outwash plains. In a representative profile the surface layer is very dark gray fine sand about two inches thick. The subsurface layer is dark brown fine sand about eight inches thick. The upper 18 inches of the subsoil is yellowish-brown loose fine sand. The lower part is very pale brown fine sand that has yellowish-red, irregular, weakly cemented bands 1/4 to 1 1/2 inches thick. Permeability is rapid and the available water capacity is low. The organic matter content is low. The supply of nitrogen and potassium is low and phosphorus is medium. Most areas of Zimmerman soil are used for crops, woodland, or urban development. The major limitations are the low available water capacity and the resulting hazards of soil blowing and droughtiness. 38 I I I I I I I I I I I I I I I I I I I