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 311<br />
Major Component Description<br />
Wayden and similar soils<br />
Composition: 35 percent<br />
Geomorphic description:<br />
• Side slope shoulder on hill<br />
• Nose slope shoulder on hill<br />
• Nose slope summit on hill<br />
Slope: 8 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: Clay<br />
Depth to bedrock (paralithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Clayey residuum weathered from<br />
shale and siltstone<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 2.7 inches<br />
Amherst and similar soils<br />
Composition: 30 percent<br />
Geomorphic description:<br />
• Nose slope shoulder on hill<br />
• Nose slope summit on hill<br />
Slope: 8 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 clay loam<br />
Depth to bedrock (lithic): 10 to 20 inches<br />
Drainage class: Well drained<br />
Parent material: Clayey residuum weathered from<br />
andesite<br />
Native plant cover type: Forestland<br />
Available water capacity: Mainly 2.5 inches<br />
Winifred and similar soils<br />
Composition: 25 percent<br />
Geomorphic description:<br />
• Side slope backslope on hill<br />
• Base slope footslope on hill<br />
• Base slope backslope on hill<br />
Slope: 8 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: Cobbly clay loam<br />
Depth to bedrock (paralithic): 20 to 40 inches<br />
Drainage class: Well drained<br />
Parent material: Clayey residuum weathered from<br />
sandstone and shale<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 5.3 inches<br />
Additional Components<br />
Bowery and similar soils: 4 percent<br />
Bacbuster and similar soils: 3 percent<br />
Work 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 />
433D—Monaberg loam, 4 to 15 percent<br />
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 />
Monaberg and similar soils<br />
Composition: 85 percent<br />
Geomorphic description: Fan<br />
Slope: 4 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: Loam<br />
Drainage class: Well drained<br />
Parent material: Loamy alluvium or colluvium<br />
Native plant cover type: Rangeland<br />
Available water capacity: Mainly 9.9 inches<br />
Additional Components<br />
Adel and similar soils: 5 percent<br />
Bridger and similar soils: 5 percent<br />
Millerlake 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 />
434F—Redchief-Arrowpeak, moist<br />
complex, 15 to 60 percent slopes<br />
Setting<br />
Elevation: 5,500 to 7,500 feet<br />
Mean annual precipitation: 20 to 25 inches<br />
Frost-free period: 50 to 70 days
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