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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<strong>Sweet</strong> <strong>Grass</strong> <strong>County</strong> <strong>Area</strong>, <strong>Montana</strong>—Part I 299<br />
411E—Pianohill-Whitlash-Adel complex,<br />
15 to 45 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 />
Pianohill and similar soils<br />
Composition: 40 percent<br />
Geomorphic description:<br />
• Base slope footslope on hill<br />
• Base slope backslope on hill<br />
• Side slope backslope on hill<br />
Slope: 15 to 35 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: Loam<br />
Depth to bedrock (lithic): 20 to 40 inches<br />
Drainage class: Well drained<br />
Parent material: Residuum weathered from tuff<br />
breccia<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 5.2 inches<br />
Whitlash and similar soils<br />
Composition: 30 percent<br />
Geomorphic description:<br />
• Nose slope summit on hill<br />
• Nose slope shoulder on hill<br />
Slope: 15 to 45 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: Gravelly loam<br />
Depth to bedrock (lithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Residuum weathered from gabbro<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 2.0 inches<br />
Bowery and similar soils<br />
Composition: 15 percent<br />
Geomorphic description: Hill and swale<br />
Slope: 2 to 15 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: Loam<br />
Drainage class: Well drained<br />
Parent material: Loamy alluvium or colluvium<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 10.6 inches<br />
Additional Components<br />
Beenom and similar soils: 5 percent<br />
Sawicki and similar soils: 5 percent<br />
Weedzunit and similar soils: 5 percent<br />
Management<br />
For management information about this map unit,<br />
see appropriate sections in Part II <strong>of</strong> this publication.<br />
412E—Lap-Winspect-Rock outcrop<br />
complex, 8 to 35 percent slopes<br />
Setting<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 />
Lap and similar soils<br />
Composition: 40 percent<br />
Geomorphic description:<br />
• Nose slope summit on hill<br />
• Nose slope shoulder on hill<br />
Slope: 8 to 35 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 limestone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 1.5 inches<br />
Winspect and similar soils<br />
Composition: 35 percent<br />
Geomorphic description:<br />
• Base slope backslope on hill<br />
• Base slope footslope on hill<br />
Slope: 8 to 35 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: Cobbly loam<br />
Drainage class: Well drained<br />
Parent material: Gravelly colluvium weathered from<br />
limestone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 6.5 inches