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Chilcott soil series

The Chilcott series consists of moderately deep to duripan, well drained soils with slow permeability that formed in a thin mantle of loess and silty alluvium from loess and weathered volcanic ash over loamy or sandy and gravelly alluvium from igneous materials. Slopes range from 0 to 30 percent on plains and valleys. The average annual precipitation is about 10 inches and the average annual temperature is about 51 degrees F.

 

TAXONOMIC CLASS: Fine, smectitic, mesic Abruptic Xeric Argidurids

 

Depth to calcium carbonates - 10 to 30 inches

Depth to duripan - 20 to 40 inches

Depth to bedrock - greater than 60 inches (see remarks)

Moisture control section - moist less than 90 consecutive days when the soil temperature is greater than 47 degrees F.

Average annual soil temperature - 47 to 56 degrees F.

 

USE AND VEGETATION: Chilcott soils are used mainly for irrigated cropland, hayland and pastureland at lower elevations and for rangeland and wildlife habitat at higher elevations. Crops grown include corn and small grains. The dominant natural vegetation is Wyoming big sagebrush, Thurber needlegrass, and bluebunch wheatgrass.

 

DISTRIBUTION AND EXTENT: Southwestern Idaho and eastern Oregon. MLRA 10, 11, and 25. Chilcott soils are extensive.

 

The original concept of this series is a soil with a duripan formed at a sand and gravel discontinuity. The expansion to include phases with duripans over basalt would not be allowed under new series criteria and should be considered outside the series concept.

 

For additional information about Idaho soils, please visit:

storymaps.arcgis.com/stories/97d01af9d4554b9097cb0a477e04...

 

For a detailed description, visit:

soilseries.sc.egov.usda.gov/OSD_Docs/C/CHILCOTT.html

 

For acreage and geographic distribution, visit:

casoilresource.lawr.ucdavis.edu/see/#chilcott

 

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Uploaded on January 29, 2011
Taken in January 2004