56 43—Maklak paragravelly ashy loamy sand, high precipitation, 0 to 10 percent slopes

43—Maklak paragravelly ashy loamy sand, high precipitation, 0 to 10 percent slopes

 Map Unit Setting

 General location: Valleys in the southeastern part of the park

Major land resource area (MLRA): 6

Elevation: 4,500 to 6,000 feet

Average annual precipitation: 30 to 60 inches

Average annual air temperature: 38 to 42 degrees F

Frost-free period: 10 to 50 days

 Map Unit Composition

 Maklak and similar soils: 85 percent

Minor components: 15 percent

 Characteristics of the Maklak and Similar Soils

 Setting

 Landform: Ashflow

Geomorphic position: Pumice flows and ashflows in valleys and on lava plains

Parent material: Pumice and ash

 Properties and qualities

 Slope: 0 to 10 percent

Percentage of surface covered with stones and boulders: None

Restrictive features: None within a depth of 60 inches

Drainage class: Excessively drained

Permeability: Very rapid

Flooding: Not present

Water table: Not present

Ponding: Not present

Available water capacity: About 6.2 inches

 Interpretive groups

 Ecological site: Forestland—(006XY703OR) Pinus ponderosa/Symphoricarpos hesperius/Carex inops

 Typical profile

 Oi—0 to 1 inch; slightly decomposed plant material

A—1 inch to 4 inches; paragravelly ashy loamy sand

Bw—4 to 15 inches; very paragravelly ashy loamy sand

C1—15 to 25 inches; extremely paracobbly ashy loamy sand

C2—25 to 60 inches; extremely paragravelly ashy loamy sand

 Characteristics of the Minor Components

 Lapine soils

 Percentage of map unit: 10 percent

Landform: Ashfall

Geomorphic position: Pumice and ashfall material in valleys and on lava plains

 Collier soils

 Percentage of map unit: 5 percent

Landform: Ashflow

Geomorphic position: Ashflow material in valleys and on lava plains

 Major Soil Features and Properties Affecting Management

 Maklak soil

 • High pumice content

• Paracobbles throughout the profile

• Very rapid permeability

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