AmB—Armour silt loam, 2 to 5 percent slopes
Map Unit Setting
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National map unit symbol: 2td31
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Elevation: 500 to 850 feet
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Mean annual precipitation: 48 to 58 inches
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Mean annual air temperature: 57 to 61 degrees F
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Frost-free period: 190 to 230 days
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Farmland classification: All areas are prime farmland
Map Unit Composition
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Armour and similar soils: 90 percent
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Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Armour
Setting
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Landform: Stream terraces
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Landform position (two-dimensional): Footslope, toeslope
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Landform position (three-dimensional): Base slope, tread
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Down-slope shape: Concave, convex
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Across-slope shape: Linear, convex
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Parent material: Silty alluvium over clayey residuum weathered from phosphatic limestone
Typical profile
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A - 0 to 19 inches: silt loam
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Bt - 19 to 58 inches: silty clay loam
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BC - 58 to 79 inches: clay
Properties and qualities
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Slope: 2 to 5 percent
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Depth to restrictive feature: More than 80 inches
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Natural drainage class: Well drained
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Runoff class: Low
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Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr)
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Depth to water table: More than 80 inches
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Frequency of flooding: None
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Frequency of ponding: None
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Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
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Available water storage in profile: High (about 11.6 inches)
Interpretive groups
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Land capability classification (irrigated): 2e
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Land capability classification (nonirrigated): 2e
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Hydrologic Soil Group: B
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Hydric soil rating: No
AmC—Armour silt loam, 5 to 12 percent slopes
Map Unit Setting
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National map unit symbol: 2td32
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Elevation: 500 to 850 feet
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Mean annual precipitation: 48 to 58 inches
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Mean annual air temperature: 57 to 61 degrees F
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Frost-free period: 190 to 230 days
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Farmland classification: Not prime farmland
Map Unit Composition
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Armour and similar soils: 90 percent
-
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Armour
Setting
-
Landform: Stream terraces
-
Landform position (two-dimensional): Footslope, toeslope
-
Landform position (three-dimensional): Base slope, tread
-
Down-slope shape: Concave, convex
-
Across-slope shape: Linear, convex
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Parent material: Silty alluvium over clayey residuum weathered from phosphatic limestone
Typical profile
-
A - 0 to 19 inches: silt loam
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Bt - 19 to 58 inches: silty clay loam
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BC - 58 to 79 inches: clay
Properties and qualities
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Slope: 5 to 12 percent
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Depth to restrictive feature: More than 80 inches
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Natural drainage class: Well drained
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Runoff class: Medium
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Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr)
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Depth to water table: More than 80 inches
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Frequency of flooding: None
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Frequency of ponding: None
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Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
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Available water storage in profile: High (about 11.6 inches)
Interpretive groups
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Land capability classification (irrigated): 3e
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Land capability classification (nonirrigated): 3e
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Hydrologic Soil Group: B
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Hydric soil rating: No
AmC3—Armour silty clay loam, 5 to 12 percent slopes, severely eroded
Map Unit Setting
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National map unit symbol: 2v58r
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Elevation: 410 to 970 feet
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Mean annual precipitation: 48 to 58 inches
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Mean annual air temperature: 57 to 61 degrees F
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Frost-free period: 190 to 230 days
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Farmland classification: Not prime farmland
Map Unit Composition
-
Armour and similar soils: 90 percent
-
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Armour
Setting
-
Landform: Stream terraces
-
Landform position (two-dimensional): Footslope
-
Landform position (three-dimensional): Base slope, tread
-
Down-slope shape: Concave
-
Across-slope shape: Linear
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Parent material: Silty alluvium over clayey residuum weathered from phosphatic limestone
Typical profile
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A - 0 to 6 inches: silty clay loam
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Bt - 6 to 58 inches: silty clay loam
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BC - 58 to 79 inches: silty clay loam
Properties and qualities
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Slope: 5 to 12 percent
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Depth to restrictive feature: More than 80 inches
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Natural drainage class: Well drained
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Runoff class: Medium
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Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in/hr)
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Depth to water table: More than 80 inches
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Frequency of flooding: None
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Frequency of ponding: None
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Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
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Available water storage in profile: High (about 10.9 inches)
Interpretive groups
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Land capability classification (irrigated): None specified
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Land capability classification (nonirrigated): 4e
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Hydrologic Soil Group: B
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Hydric soil rating: No