Trail Development Volume II - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I coarse sand. The permeability is rapid. The supply of nitrogen and potassium is low and phosphorus is medium. There are many different uses for this soil. The chief limitations to this soil are the low water capacity and the resulting hazards of soil blowing and droughtiness. Isan Series The Isan series consists of nearly level, very poorly drained soils formed in outwash sands. These soils are found in depressions and drainageways and on low flats of outwash plains. A representative profile has a surface layer that is black sandy loam in the upper 11 inches and very dark gray loamy sand in the lower 13 inches. The subsoil is mottled, dark gray loose sand about six inches thick. The underlying material is gray coarse sand. Permeability is rapid and the available water capacity is low. The organic matter content is high. The available nitrogen and phosphorus are medium and potassium is low. The major limitation of these soils is the hazard of wetness. Some areas can be cropped or pastured if drained. Markey Muck The Markey series consists of nearly level very poorly drained soils formed in organic soil material overlying sands. These soils are in small bogs and along the edge of larger bogs in the sandy outwash plains. In a representative profile the surface layer is black muck about 10 inches thick. The subsurface layers are black or very dark brown muck. The upper five inches of the underlying material is very dark gray fine sandy loam and the rest is grayish-brown and gray sand and fine sand. Permeability is moderately rapid and the available water capacity is high. The organic matter content is very high. The available nitrogen is high and the phosphorus and potassium are low. Most areas of Markey soils are in native vegetation. The limitations are the hazards of wetness, ponding, and unseasonable frost. Nymore Series The Nymore series consists of nearly level to steep excessively drained soils formed in outwash sands. These soils are on broad smooth flats and narrow hillsides adjacent to drainageways and large depressions in sandy outwash plains. A representative profile has a surface layer that is very dark gray and very dark grayish- brown loamy sand about seven inches thick. The subsoil is dark brown loose loamy sand about 19 inches thick. The underlying material is yellowish-brown sand. The permeability is rapid and the available water capacity is low. The organic matter content is low. The supply of available nitrogen and potassium are low and phosphorus medium. The water table is generally at a depth of more than six feet. Most areas that have Nymore soils are developed. The major limitations of this series are 37