Gwin soil and landscape

Landscape--basalt plateaus, hills, canyonlands

Landform--structural benches, ridgetops, hillslopes, canyons

Slope--0 to 90 percent

Parent material--colluvium and residuum derived from basalt mixed with loess

Mean annual precipitation--about 510 mm

Mean annual air temperature--about 9 degrees C

Depth class--shallow

Drainage class--well drained

Soil moisture regime--xeric

Soil temperature regime--mesic

Soil moisture subclass--typic

 

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Argixerolls

 

Mean annual soil temperature--about 8 to 12 degrees C

Moisture control section--usually moist; typically dry 45 to 75 consecutive days following summer solstice

Depth to bedrock--25 to 50 cm

Particle-size control section--40 to 90 percent gravel, cobbles, and stones; 15 to 35 percent clay

Reaction--6.1 to 7.8

Hue--10YR or 7.5YR throughout

 

USE AND VEGETATION:

Use--livestock grazing, wildlife habitat

Native vegetation--mainly bluebunch wheatgrass, Idaho fescue, and Sandberg bluegrass

 

DISTRIBUTION AND EXTENT: Eastern and central Washington, eastern Oregon, and western Idaho; MLRAs 8, 9, and 10; large extent

 

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/G/GWIN.html

 

For acreage and geographic distribution, visit:

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

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