Alumrock soil and landscape
Soil profile: A representative soil profile of the Alumrock series.
Landscape: An area of Alumrock soils in the Guadalupe Oak Grove Park in south San Jose near Guadalupe Creek. North slopes have oaks and annual grasses, and south slopes have fewer oaks. Slopes are moderately steep with rock outcrops in some areas. (Supplement to the Soil Survey of Santa Clara Area, California, Western Part; by William Reed, and Christopher “Kit” Paris, Natural Resources Conservation Service)
The Alumrock series consists of moderately deep, well drained soils that formed in residuum from sandstone. Alumrock soils are on hills. Slopes range from 9 to 50 percent. The mean annual precipitation is about 20 inches, and the mean annual temperature is about 60 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Pachic Argixerolls
Note: The soil had been moistened to a depth of 40cm at the time the photo was taken. The natural dark colored mollic epipedon, when moist, extended to a depth of 66cm.
Depth to slightly weathered sandstone is 50 to 100 cm. The mean annual soil temperature is 60 to 62 degrees F. The particle size control section averages 18 to 24 percent clay, and 1 to 35 percent rock fragments, mostly gravel. The soil is not calcareous. Organic matter ranges from 1 to 3 percent to a depth of 25 cm. Rock fragments on the surface range from 0 to 10 percent gravel.
USE AND VEGETATION: This soil is used for recreation and urban uses. Vegetation is oaks and annual grasses in recreation areas and urban areas have lawn grasses and ornamental plants.
DISTRIBUTION AND EXTENT: The soils are inextensive and are mapped in Santa Clara County Major Land Resource Area: 15 -- Central California Coast Range
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/A/ALUMROCK.html
For acreage and geographic distribution, visit:
Alumrock soil and landscape
Soil profile: A representative soil profile of the Alumrock series.
Landscape: An area of Alumrock soils in the Guadalupe Oak Grove Park in south San Jose near Guadalupe Creek. North slopes have oaks and annual grasses, and south slopes have fewer oaks. Slopes are moderately steep with rock outcrops in some areas. (Supplement to the Soil Survey of Santa Clara Area, California, Western Part; by William Reed, and Christopher “Kit” Paris, Natural Resources Conservation Service)
The Alumrock series consists of moderately deep, well drained soils that formed in residuum from sandstone. Alumrock soils are on hills. Slopes range from 9 to 50 percent. The mean annual precipitation is about 20 inches, and the mean annual temperature is about 60 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Pachic Argixerolls
Note: The soil had been moistened to a depth of 40cm at the time the photo was taken. The natural dark colored mollic epipedon, when moist, extended to a depth of 66cm.
Depth to slightly weathered sandstone is 50 to 100 cm. The mean annual soil temperature is 60 to 62 degrees F. The particle size control section averages 18 to 24 percent clay, and 1 to 35 percent rock fragments, mostly gravel. The soil is not calcareous. Organic matter ranges from 1 to 3 percent to a depth of 25 cm. Rock fragments on the surface range from 0 to 10 percent gravel.
USE AND VEGETATION: This soil is used for recreation and urban uses. Vegetation is oaks and annual grasses in recreation areas and urban areas have lawn grasses and ornamental plants.
DISTRIBUTION AND EXTENT: The soils are inextensive and are mapped in Santa Clara County Major Land Resource Area: 15 -- Central California Coast Range
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/A/ALUMROCK.html
For acreage and geographic distribution, visit: