Transcription

1

2

3

4

5

6

7

8

9

10

11

12 72C 155F 350B 350C 542A SOILS IN AREA OF INTEREST Doughty Loam; 4 to 8 percent slopes Anceney Cobbly Loam; 15 to 60 percent slopes Blackmore Silt Loam; 0 to 4 percent slopes Blackmore Silt Loam; 4 to 8 percent slopes Blossberg Loam; 0 to 2 percent slopes Soil Survey Area: Gallatin County Area, Montana Survey Area Data: Version 22, Sep 5, C Doughty Loam, 4% - 8% slopes Map Unit Setting National map unit symbol: 5709 Elevation: 5,000 to 5,650 feet Mean annual precipitation: 18 to 22 inches Mean annual air temperature: 37 to 43 degrees F Frost-free period: 80 to 95 days Farmland classification: Farmland of statewide importance Map Unit Composition Doughty and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Doughty Setting Landform: Alluvial fans, stream terraces Parent material: Loamy alluvium Typical profile A - 0 to 8 inches: loam Bt - 8 to 15 inches: gravelly clay loam Bk - 15 to 21 inches: gravelly loam 2Ck - 21 to 60 inches: very gravelly loam Properties and qualities Slope: 4 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 40 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low (about 5.9 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT), Upland Shrubland (R044BP820MT) Map Unit Description: Doughty loam, 4 to 8 percent slopes Minor Components Doughty Percent of map unit: 5 percent Landform: Alluvial fans, stream terraces Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT) Anceney Percent of map unit: 3 percent Landform: Stream terraces Ecological site: Silty-Droughty (SiDr) 15-19" p.z. (R044XS690MT) Doughty Percent of map unit: 2 percent Landform: Stream terraces, alluvial fans Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT)

13 155F Anceney Cobbly Loam, 15% - 60% slopes Map Unit Setting National map unit symbol: 56lq Elevation: 4,500 to 5,900 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 37 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Not prime farmland Map Unit Composition Anceney and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Anceney Setting Landform: Escarpments Parent material: Loamy alluvium colluvium Typical profile A - 0 to 6 inches: cobbly loam AB - 6 to 10 inches: gravelly loam Bk - 10 to 60 inches: very cobbly loam Properties and qualities Slope: 15 to 60 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 30 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Low (about 5.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Ecological site: Silty-Droughty-Steep (SiDrStp) 15-19" p.z. (R044XS356MT), Upland Grassland (R044BP818MT), Upland Sagebrush Shrubland (R043BP819MT) Minor Components Meagher Percent of map unit: 5 percent Landform: Escarpments Ecological site: Thin Silty (TSi) 15-19" p.z. (R044XS363MT) Bowery Percent of map unit: 3 percent Landform: Escarpments Ecological site: Overflow (Ov) 15-19" p.z. (R044XS351MT) Cabba Percent of map unit: 2 percent Landform: Escarpments Ecological site: Shallow (Sw) 15-19" p.z. (R044XS353MT) 350B Blackmore Silt Loam, 0% - 4% slopes Map Unit Setting National map unit symbol: 56q7 Elevation: 4,850 to 5,550 feet Mean annual precipitation: 18 to 22 inches Mean annual air temperature: 37 to 43 degrees F Frost-free period: 80 to 95 days Farmland classification: All areas are prime farmland Map Unit Composition Blackmore and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Blackmore Setting Landform: Stream terraces Parent material: Calcareous loess Typical profile A - 0 to 10 inches: silt loam Bt - 10 to 27 inches: silty clay loam Bk1-27 to 42 inches: silt loam Bk2-42 to 60 inches: silt loam Properties and qualities Slope: 0 to 4 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 30 percent Available water storage in profile: High (about 11.4 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT), Upland Grassland (R044BP818MT) Minor Components Bowery Percent of map unit: 5 percent Landform: Stream terraces, alluvial fans Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Blackmore Percent of map unit: 3 percent Landform: Stream terraces Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT) Brodyk Percent of map unit: 2 percent Landform: Stream terraces Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT)

14 350C Blackmore Silt Loam, 4% - 8% slopes Map Unit Setting National map unit symbol: 56q8 Elevation: 4,750 to 5,600 feet Mean annual precipitation: 18 to 22 inches Mean annual air temperature: 37 to 43 degrees F Frost-free period: 80 to 95 days Farmland classification: Farmland of statewide importance Map Unit Composition Blackmore and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Blackmore Setting Landform: Stream terraces Parent material: Calcareous loess Typical profile A - 0 to 10 inches: silt loam Bt - 10 to 27 inches: silty clay loam Bk1-27 to 42 inches: silt loam Bk2-42 to 60 inches: silt loam Properties and qualities Slope: 4 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 30 percent Available water storage in profile: High (about 11.4 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT), Upland Grassland (R044BP818MT) Minor Components Bowery Percent of map unit: 4 percent Landform: Alluvial fans, stream terraces Ecological site: Silty (Si) 15-19" p.z. (R044XS355MT) Hydric soil rating: Unranked Brodyk Percent of map unit: 3 percent Landform: Stream terraces Ecological site: Limy (Ly) 15-19" p.z. (R044XS357MT) Hydric soil rating: Unranked Doughty Percent of map unit: 3 percent Landform: Stream terraces Ecological site: Silty (Si) 20"+ p.z. (R043BS323MT) Hydric soil rating: Unranked 542A Blossberg Loam, 0% - 2% slopes Map Unit Setting National map unit symbol: 56wx Elevation: 4,200 to 5,550 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 39 to 45 degrees F Frost-free period: 90 to 110 days Farmland classification: Farmland of local importance Map Unit Composition Blossberg and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Blossberg Setting Landform: Stream terraces Parent material: Alluvium Typical profile A - 0 to 15 inches: loam Bg - 15 to 24 inches: sandy clay loam 2C - 24 to 60 inches: extremely gravelly loamy coarse sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 1.98 in/hr) Depth to water table: About 12 to 24 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water storage in profile: Low (about 5.5 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 5w Hydrologic Soil Group: B/D Ecological site: Wet Meadow (WM) 15-19" p.z. (R044XS365MT), Subirrigated Grassland (R044BP815MT) Hydric soil rating: Yes Minor Components Bonebasin Percent of map unit: 10 percent Landform: Terraces Ecological site: Wet Meadow (WM) 15-19" p.z. (R044XS365MT) Hydric soil rating: Yes Meadowcreek Percent of map unit: 5 percent Landform: Stream terraces Ecological site: Subirrigated (Sb) 15-19" p.z. (R044XS359MT)

15

16

17

18