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California State Soil

San Joaquin Valey in CA - click to see all geological symbols
San Joaquin Valley, California - photo of postcard by adam79 on Flickr - noncommercial use permitted with attribution / no derivative works.
See All Geological Symbols.

San Joaquin Soil

San Joaquin soil series was designated the official state soil of California in 1997 through the efforts of students and teachers at Martin Luther King, Jr. Middle School in Madera, natural resource professionals, the Professional Soil Scientists Association of California, legislators, and several state universities. A profile of San Joaquin soil is displayed at the World Soil Museum in the Netherlands.

California's central valley has more than half a million acres of San Joaquin soils (named for the south end of that great valley - one of the richest agricultural areas in the world). San Joaquin soils are used for irrigated crops (such as wheat, rice, figs, almonds, and grapes) and also for pasture and urban development. A cemented hardpan a few feet beneath the surface restricts roots and water percolation. The designation of a state soil in 1997 was to commemorate the completion of California's most comprehensive soil inventory and to acknowledge the importance of soil.

Source:
San Joaquin - California State Soil: USDA (pdf)
State Soils: USDA Natural Resources Conservation Service
Links:
State Soil: California State Library
State Soils: Natural Resources Conservation Service - USDA
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California Symbols & Icons:

bird - animal
tree- flower
fish - mammal
marine fish
insect - reptile
grass - soil
mineral - fossil
rock- gemstone
ghost town 1 - 2  
artifact

flag - seal
motto - colors
name - nickname
song - band
dance - poet
folk dance
theatre - museum
historical society
tartan - tall ship
quarter
 

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California Gifts - Gifts by State