Elkhorn Slough Reserve, California

Soil Types

Predominant soils in the watershed include Arnold loamy sand, Elkhorn fine sandy loam, Santa Ynez fine sandy loam and Alviso silty clay loam.

Arnold soils consist of somewhat excessively drained soils that formed on hills and uplands in old marine sand dunes or in materials weathered from soft sandstone. Capability classes are IV and VII. They are generally found in the hills in the northeast part of the watershed. While they are primarily in native vegetation, they are also used for strawberry production in some locations.

Elkhorn soils are well drained soils on marine terraces and dune-like hills. Capability classes are II and III. Santa Ynez soils consist of moderately well drained soils that formed on terraces in alluvium derived from sandstone, and are in capability class IV. The Elkhorn and Santa Ynez soils are found in the western and southern parts of the watershed. Most of the cropland is on these soils. The Alviso soils are found in the wetlands adjacent to the sloughs.

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