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
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264 <strong>Soil</strong> <strong>Survey</strong><br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 1.1 inches<br />
Adel and similar soils<br />
Composition: 20 percent<br />
Geomorphic description: Mountain and swale<br />
Slope: 8 to 35 percent<br />
Elevation: 6,000 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<br />
Additional Components<br />
Bridger and similar soils: 4 percent<br />
Pintlar and similar soils: 4 percent<br />
Gilispie and similar soils: 2 percent<br />
Management<br />
For management information about this map unit,<br />
see appropriate sections in Part II <strong>of</strong> this publication.<br />
349D—Cheadle channery loam,<br />
2 to 15 percent slopes<br />
Setting<br />
Elevation: 6,000 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 />
Cheadle and similar soils<br />
Composition: 85 percent<br />
Geomorphic description:<br />
• Mountaintop summit on mountain<br />
• Mountaintop shoulder on mountain<br />
Slope: 2 to 15 percent<br />
Elevation: 6,000 to 7,500 feet<br />
Effective annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days<br />
Surface layer texture: Channery loam<br />
Depth to bedrock (lithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Residuum weathered from<br />
sandstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 1.4 inches<br />
Additional Components<br />
Gilispie and similar soils: 5 percent<br />
Lymanson and similar soils: 4 percent<br />
Merino and similar soils: 4 percent<br />
Tongue River and similar soils: 2 percent<br />
Management<br />
For management information about this map unit,<br />
see appropriate sections in Part II <strong>of</strong> this publication.<br />
350F—Castner-Mowbray-Rock outcrop<br />
complex, 25 to 60 percent slopes<br />
Setting<br />
Field investigation intensity: Order 2<br />
Elevation: 5,300 to 6,200 feet<br />
Mean annual precipitation: 17 to 20 inches<br />
Frost-free period: 70 to 90 days<br />
Major Component Description<br />
Castner and similar soils<br />
Composition: 40 percent<br />
Geomorphic description:<br />
• Nose slope summit on escarpment<br />
• Nose slope shoulder on escarpment<br />
Slope: 25 to 60 percent<br />
Elevation: 5,300 to 6,200 feet<br />
Effective annual precipitation: 17 to 20 inches<br />
Frost-free period: 70 to 90 days<br />
Surface layer texture: Channery loam<br />
Depth to bedrock (lithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Residuum weathered from<br />
sandstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 1.4 inches<br />
Mowbray and similar soils<br />
Composition: 32 percent<br />
Geomorphic description: Base slope on escarpment<br />
and fan<br />
Slope: 25 to 60 percent<br />
Elevation: 5,300 to 6,200 feet<br />
Effective annual precipitation: 17 to 20 inches<br />
Frost-free period: 70 to 90 days<br />
Surface layer texture: Channery loam<br />
Drainage class: Well drained<br />
Parent material: Gravelly colluvium weathered from<br />
calcareous sandstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 4.7 inches