Soil Survey of Sweet Grass County Area, Montana - Soil Data Mart

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316 Soil Survey Parent material: Clayey residuum weathered from calcareous shale Native plant cover type: Rangeland Available water capacity: Mainly 2.4 inches Delpoint and similar soils Composition: 40 percent Geomorphic description: • Side slope backslope on hill • Base slope footslope on hill • Base slope backslope on hill Slope: 2 to 15 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Loam Depth to bedrock (paralithic): 20 to 40 inches Drainage class: Well drained Parent material: Loamy residuum weathered from sandstone and siltstone Native plant cover type: Rangeland Available water capacity: Mainly 4.6 inches Additional Components Megonot and similar soils: 4 percent Cabbart and similar soils: 3 percent Yamacall and similar soils: 3 percent Management For management information about this map unit, see appropriate sections in Part II of this publication. 442C—Tanna-Yawdim complex, 2 to 8 percent slopes Setting Elevation: 3,750 to 5,200 feet Mean annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Major Component Description Tanna and similar soils Composition: 50 percent Geomorphic description: Plain and swale Slope: 2 to 8 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Clay loam Depth to bedrock (paralithic): 20 to 40 inches Drainage class: Well drained Parent material: Clayey residuum weathered from sandstone and shale Native plant cover type: Rangeland Available water capacity: Mainly 4.2 inches Yawdim and similar soils Composition: 40 percent Geomorphic description: Knoll and plain Slope: 2 to 8 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Clay Depth to bedrock (paralithic): 10 to 20 inches Drainage class: Well drained Parent material: Clayey residuum weathered from calcareous shale Native plant cover type: Rangeland Available water capacity: Mainly 2.4 inches Additional Components Marmarth and similar soils: 4 percent Cabbart and similar soils: 3 percent Megonot and similar soils: 3 percent Management For management information about this map unit, see appropriate sections in Part II of this publication. 443B—Sieben-Attewan gravelly loams, 0 to 4 percent slopes Setting Elevation: 3,750 to 5,200 feet Mean annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Major Component Description Sieben and similar soils Composition: 50 percent Geomorphic description: Tread on terrace Slope: 2 to 4 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Gravelly loam Drainage class: Well drained Parent material: Gravelly alluvium Native plant cover type: Rangeland Available water capacity: Mainly 3.9 inches Attewan and similar soils Composition: 40 percent Geomorphic description: Tread on terrace Slope: 0 to 4 percent
Sweet Grass County Area, Montana—Part I 317 Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Gravelly loam Drainage class: Well drained Parent material: Loamy over sandy and gravelly alluvium Native plant cover type: Rangeland Available water capacity: Mainly 4.3 inches Additional Components Verson and similar soils: 4 percent Evanston and similar soils: 3 percent Sixbeacon and similar soils: 3 percent Management For management information about this map unit, see appropriate sections in Part II of this publication. 444C—Boxwell-Ethridge complex, 2 to 8 percent slopes Setting Elevation: 3,750 to 5,200 feet Mean annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Major Component Description Boxwell and similar soils Composition: 50 percent Geomorphic description: Plain and swale Slope: 2 to 8 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Loam Depth to bedrock (paralithic): 20 to 40 inches Drainage class: Well drained Parent material: Loamy residuum weathered from sandstone and siltstone Native plant cover type: Rangeland Available water capacity: Mainly 5.0 inches Ethridge and similar soils Composition: 40 percent Geomorphic description: Plain and swale Slope: 2 to 8 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Clay loam Drainage class: Well drained Parent material: Clayey alluvium Native plant cover type: Rangeland Available water capacity: Mainly 9.7 inches Additional Components Evanston and similar soils: 3 percent Tanna and similar soils: 3 percent Cabbart and similar soils: 2 percent Rentsac and similar soils: 1 percent Yamacall and similar soils: 1 percent Management For management information about this map unit, see appropriate sections in Part II of this publication. 444D—Boxwell-Ethridge complex, 8 to 15 percent slopes Setting Elevation: 3,750 to 5,200 feet Mean annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Major Component Description Boxwell and similar soils Composition: 45 percent Geomorphic description: Plain and swale Slope: 8 to 15 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Loam Depth to bedrock (paralithic): 20 to 40 inches Drainage class: Well drained Parent material: Loamy residuum weathered from sandstone and siltstone Native plant cover type: Rangeland Available water capacity: Mainly 5.0 inches Ethridge and similar soils Composition: 40 percent Geomorphic description: Plain and swale Slope: 8 to 15 percent Elevation: 3,750 to 5,200 feet Effective annual precipitation: 10 to 14 inches Frost-free period: 95 to 125 days Surface layer texture: Clay loam Drainage class: Well drained Parent material: Clayey alluvium Native plant cover type: Rangeland Available water capacity: Mainly 9.7 inches
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How to Use This Soil Survey Detaile
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iii Contents Part I How To Use This
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v Winkler Series...................
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vii 184D—Absarokee-Shambo loams,
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ix 274C—Work clay loam, 4 to 8 pe
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xi 371E—Whitlash cobbly sandy loa
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xiii 448B—Attewan loam, 0 to 4 pe
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xv 424E—Bridger, very stony-Adel
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xvii 359F—Fifer-Cheadle-Monaberg
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xix 369E—Rentsac-Tanna complex, 1
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xxi M-W—Water, miscellaneous ....
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xxv Foreword This soil survey conta
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2 Soil Survey The Lewis and Clark E
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4 Soil Survey 10,000 and 11,500 fee
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6 Soil Survey subsurface folding in
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8 Soil Survey interbeds. It is over
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10 Soil Survey Creek, approximately
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12 Soil Survey disappears during mi
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14 Soil Survey Temperature and Prec
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16 Growing Season (Recorded in the
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18 Soil Survey these organisms die,
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20 Soil Survey great group is ident
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22 Soil Survey firm, very sticky, v
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24 Soil Survey few very fine and fi
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26 Soil Survey moderate fine granul
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28 Soil Survey very friable, slight
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30 Soil Survey Range in Characteris
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32 Soil Survey Depth to the Cr hori
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34 Soil Survey Chroma: 2 to 4 Textu
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36 Soil Survey Texture (less than 2
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38 Soil Survey Clay content: 40 to
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40 Soil Survey Taxonomic Class: Fin
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42 Soil Survey Chroma: 1 or 2 Redox
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44 Soil Survey Chroma: 2 or 3 Textu
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48 Soil Survey Typical Pedon Cambet
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50 Soil Survey flagstones; slightly
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52 Soil Survey Cg2—30 to 34 inche
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54 Soil Survey prismatic structure
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56 Soil Survey Bt horizons Hue: 2.5
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60 Soil Survey sec. 24, T. 4 N., R.
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62 Soil Survey Oi—0 to 1 inch; sl
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64 Soil Survey Reed Point topograph
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66 Soil Survey Bk3 horizon Hue: 7.5
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68 Soil Survey lining pores; 10 per
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70 Soil Survey slightly plastic; ma
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72 Soil Survey moderate coarse pris
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74 Soil Survey subangular blocky st
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76 Soil Survey moderate medium and
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80 Soil Survey Bk1—12 to 19 inche
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82 Soil Survey Bw—11 to 19 inches
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84 Soil Survey Parent material: Cla
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86 Soil Survey brown (10YR 5/4) moi
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88 Soil Survey Chroma: 2 or 3 Textu
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90 Soil Survey A horizon Hue: 10YR
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94 Soil Survey Range in Characteris
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96 Soil Survey peds and lining pore
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98 Soil Survey slightly alkaline (p
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100 Soil Survey Calcium carbonate e
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102 Soil Survey Range in Characteri
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104 Soil Survey Landform: Fan and m
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106 Soil Survey Chroma: 2 or 3 Text
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108 Soil Survey Content of rock fra
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110 Soil Survey Cgk3—49 to 60 inc
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112 Soil Survey A2—7 to 13 inches
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114 Soil Survey medium subangular b
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116 Soil Survey very hard, firm, ve
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118 Soil Survey Reedwest Series Dep
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120 Soil Survey A—0 to 7 inches;
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122 Soil Survey Elevation range: 4,
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124 Soil Survey C horizon Hue: 10YR
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126 Soil Survey Texture (less than
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130 Soil Survey Mean annual air tem
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132 Soil Survey Typical Pedon Soapc
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136 Soil Survey moderately sticky,
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138 Soil Survey Bt2 horizon Hue: 7.
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140 Soil Survey A horizon Hue: 10YR
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142 Soil Survey Tibson Series Depth
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144 Soil Survey Oi—0 to 1 inch; s
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146 Soil Survey Bt1—5 to 11 inche
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148 Soil Survey Elevation range: 5,
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150 Soil Survey 2Bk—21 to 60 inch
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152 Soil Survey A—2 to 5 inches;
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154 Soil Survey Typical Pedon Weedz
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156 Soil Survey common fine to coar
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158 Soil Survey E1—4 to 12 inches
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160 Soil Survey Permeability: Moder
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162 Soil Survey Texture (less than
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173 Detailed Soil Map Units The map
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Sweet Grass County Area, Montana—
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Page 281 and 282: Sweet Grass County Area, Montana—
Page 331: Sweet Grass County Area, Montana—
Page 343 and 344: 327 References Alexander, R.R., 196
Page 345 and 346: 329 Glossary Ablation till. Loose,
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Soil Survey of Sweet Grass County Area, Montana - Soil Data Mart

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