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  2. San Joaquin (soil) - Wikipedia

    en.wikipedia.org/wiki/San_Joaquin_(soil)

    San Joaquin soil profile San Joaquin soil landscape. San Joaquin is an officially designated state insignia, the state soil of the U.S. state of California.. The California Central Valley has more than 500,000 acres (2,000 km 2) of San Joaquin soils, named for the south end of that valley.

  3. List of U.S. state soils - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._state_soils

    This is a list of U.S. state soils. A state soil is a soil that has special significance to a particular state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These official state soils share the same level of distinction as official state flowers and birds.

  4. Topsoil - Wikipedia

    en.wikipedia.org/wiki/Topsoil

    Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity.

  5. California coastal prairie - Wikipedia

    en.wikipedia.org/wiki/California_coastal_prairie

    California's coastal prairies are the most species-rich grassland types in North America, with up to 26 species present per square meter. [1] They have been described in literature as "previously unrecognized biodiversity hotspots," and are also known to provide an array of essential services—for instance, carbon storage, water filtration, agriculture, and livestock farming. [2]

  6. Annual grasslands - Wikipedia

    en.wikipedia.org/wiki/Annual_grasslands

    They are most commonly found in regions with Mediterranean climates, such as California, and provide important habitats for a variety of wildlife species. [ 1 ] [ 2 ] [ 3 ] Annual grasslands have a history of disturbance factors, including grazing , crop production, fire, and drought, which have contributed to the conversion of native perennial ...

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