Ustipsamment
A representative soil profile of Lithic Ustipsamments, which have a thin cemented surface crust. (Soil Survey of Hawaii Volcanoes National Park, Hawaii; by Chris Jasper, United States Department of Agriculture, Natural Resources Conservation Service)
Lithic Ustipsamments in this survey area consist of very shallow and shallow soils in areas of pahoehoe lava. These soils formed in volcanic base surge and volcanic ash reworked by wind and water. Slopes range from 2 to 10 percent. The mean annual rainfall is about 1,015 millimeters (40 inches), and the mean annual air temperature is about 18 degrees C (65 degrees F).
These sandy soils are shallow to pahoehoe. Climatic conditions result in seasonal dryness. The pattern of seasonal rainfall, sandy texture, and shallow soil depth limit the success of seedling germination to winter and spring. The nutrient-holding capacity is low. If soil amendments are applied, quantities should be reduced and timing spaced so that loss through leaching is minimized. The capacity to supply natural potassium is low. The shallow soil depth affects the susceptibility to erosion
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/hawaii/HI701/0...
Ustipsamment
A representative soil profile of Lithic Ustipsamments, which have a thin cemented surface crust. (Soil Survey of Hawaii Volcanoes National Park, Hawaii; by Chris Jasper, United States Department of Agriculture, Natural Resources Conservation Service)
Lithic Ustipsamments in this survey area consist of very shallow and shallow soils in areas of pahoehoe lava. These soils formed in volcanic base surge and volcanic ash reworked by wind and water. Slopes range from 2 to 10 percent. The mean annual rainfall is about 1,015 millimeters (40 inches), and the mean annual air temperature is about 18 degrees C (65 degrees F).
These sandy soils are shallow to pahoehoe. Climatic conditions result in seasonal dryness. The pattern of seasonal rainfall, sandy texture, and shallow soil depth limit the success of seedling germination to winter and spring. The nutrient-holding capacity is low. If soil amendments are applied, quantities should be reduced and timing spaced so that loss through leaching is minimized. The capacity to supply natural potassium is low. The shallow soil depth affects the susceptibility to erosion
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/hawaii/HI701/0...