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Walong soil and landscape

Soil profile: A representative soil profile of the Walong series. The moderately deep to soft bedrock Walong soils have a mollic epipedon, weak structure, and a paralithic contact of gneiss at a depth of 50 to 100 centimeters. (Supplement to the Soil Survey of Los Angeles County, California, Southeastern Part; by Randy L. Riddle and Christopher “Kit” Paris, Natural Resources Conservation Service)

 

Landscape: An area of Walong soil on a steep side slope at the Claremont Hills Wilderness Park. Walong soils are on uplands and have gradients of 15 to 75 percent. They formed in material weathered from granite. Elevations are 800 to 5,800 feet. The climate has cold moist winters and hot dry summers. The mean annual precipitation is 10 to 30 inches. The mean annual temperature ranges from 57 to 62 degrees F.; the mean January temperature is about 47 degrees F.; and the mean July temperature is about 83 degrees F. The frost free season is 150 to 250 days.

 

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, thermic Typic Haploxerolls

 

Depth to a paralithic contact with weathered granitic rock ranges from 20 to 40 inches. The soil between depths of 8 to 24 inches is usually dry all the time from late May until mid November (or 1/2 the time), and is moist in some part for more than 90 consecutive days. The mean annual soil temperature is 59 to 64 degrees F. Organic matter is more than 1 percent to a depth of 14 to 18 inches and decreases regularly to less than 1 percent at this depth. An 01 horizon is present in some pedons where there has been some accumulation of organic matter or litter. Rock fragments 2 mm to 2 cm in diameter range from 0 to 15 percent by volume, and rock fragments 7 to 25 cm in diameter range from 0 to 10 percent.

 

USE AND VEGETATION: Used mainly for range, wildlife, watershed, and recreation. Vegetation is annual grasses, blue oaks, ad=nd live oaks.

 

DISTRIBUTION AND EXTENT: Foothills of the southern Sierra Neveda and the Tehachapi Mountains. The soils are moderately extensive.

 

For additional information about the survey area, visit:

www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/california/los...

 

For a detailed soil description, visit:

soilseries.sc.egov.usda.gov/OSD_Docs/W/WALONG.html

 

For acreage and geographic distribution, visit:

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

 

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Uploaded on June 3, 2021