Soil Survey of Sweet Grass County Area, Montana - Soil Data Mart
Soil Survey of Sweet Grass County Area, Montana - Soil Data Mart
Soil Survey of Sweet Grass County Area, Montana - Soil Data Mart
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Sweet</strong> <strong>Grass</strong> <strong>County</strong> <strong>Area</strong>, <strong>Montana</strong>—Part I 281<br />
Frost-free period: 95 to 125 days<br />
Surface layer texture: Fine sandy loam<br />
Drainage class: Well drained<br />
Parent material: Sandy residuum weathered from<br />
sandstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 8.1 inches<br />
Twilight and similar soils<br />
Composition: 40 percent<br />
Geomorphic description:<br />
• Base slope backslope on hill<br />
• Base slope footslope on hill<br />
• Side slope backslope on hill<br />
• Plain<br />
• Swale<br />
Slope: 8 to 25 percent<br />
Elevation: 3,750 to 5,200 feet<br />
Effective annual precipitation: 10 to 14 inches<br />
Frost-free period: 95 to 125 days<br />
Surface layer texture: Fine sandy loam<br />
Depth to bedrock (paralithic): 20 to 40 inches<br />
Drainage class: Well drained<br />
Parent material: Sandy residuum weathered from<br />
calcareous sandstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 3.8 inches<br />
Additional Components<br />
Rentsac and similar soils: 4 percent<br />
Blacksheep and similar soils: 3 percent<br />
Cabbart and similar soils: 3 percent<br />
Management<br />
For management information about this map unit,<br />
see appropriate sections in Part II <strong>of</strong> this publication.<br />
377F—Tongue River-Cabba, moist-Adel<br />
loams, 15 to 60 percent slopes<br />
Setting<br />
Field investigation intensity: Order 2<br />
Elevation: 5,500 to 7,500 feet<br />
Mean annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days<br />
Major Component Description<br />
Tongue River and similar soils<br />
Composition: 50 percent<br />
Geomorphic description:<br />
• Mountainflank backslope on mountain<br />
• Mountainflank footslope on mountain<br />
Slope: 15 to 60 percent<br />
Elevation: 5,500 to 7,500 feet<br />
Effective annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days<br />
Surface layer texture: Loam<br />
Depth to bedrock (paralithic): 20 to 40 inches<br />
Drainage class: Well drained<br />
Parent material: Loamy residuum weathered from<br />
sandstone and siltstone<br />
Native plant cover type: Forestland<br />
Available water capacity: Mainly 5.8 inches<br />
Fifer and similar soils<br />
Composition: 25 percent<br />
Geomorphic description: Mountaintop summit on<br />
mountain<br />
Slope: 15 to 60 percent<br />
Elevation: 5,500 to 7,500 feet<br />
Effective annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days<br />
Surface layer texture: Loam<br />
Depth to bedrock (paralithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Loamy residuum weathered from<br />
sandstone and siltstone<br />
Native plant cover type: Forestland<br />
Available water capacity: Mainly 2.7 inches<br />
Adel and similar soils<br />
Composition: 15 percent<br />
Geomorphic description: Mountain and swale<br />
Slope: 15 to 25 percent<br />
Elevation: 5,500 to 7,500 feet<br />
Effective annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days<br />
Surface layer texture: Loam<br />
Drainage class: Well drained<br />
Parent material: Loamy alluvium or colluvium<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 10.2 inches
Change language