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About: San Joaquin (soil)

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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 km²) of San Joaquin soils, named for the south end of that valley. This series is the oldest continuously recognized soil series within the state. It is one of California's Benchmark Soils, and a soil profile of it is displayed in the International Soil Reference and Information Centre's World Soil Museum.

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  • 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 km²) of San Joaquin soils, named for the south end of that valley. This series is the oldest continuously recognized soil series within the state. It is one of California's Benchmark Soils, and a soil profile of it is displayed in the International Soil Reference and Information Centre's World Soil Museum. The San Joaquin series became the official state soil on August 20, 1997, the result of efforts by students and teachers from Martin Luther King, Jr. Middle School in Madera, natural resource professionals, the Professional Soil Scientists Association of California, legislators, and various state universities. These soils are used for irrigated crops, such as wheat, rice, figs, almonds, oranges, and grapes, and for pasture and urban development. San Joaquin soils formed in old alluvium on hummocky topography. A cemented hardpan a few feet beneath the surface restricts roots and water percolation. San Joaquin soils are classified in USDA soil taxonomy as fine, mixed, active, thermic abruptic durixeralfs. (en)
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  • 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 km²) of San Joaquin soils, named for the south end of that valley. This series is the oldest continuously recognized soil series within the state. It is one of California's Benchmark Soils, and a soil profile of it is displayed in the International Soil Reference and Information Centre's World Soil Museum. (en)
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  • San Joaquin (soil) (en)
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