Major Land Resource Area 049X

Southern Rocky Mountain Foothills

Accessed: 12/21/2024

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Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin

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Ecological site group list

Provisional

049XESG01

Breaks
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope >35% & >40% surface rock
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Provisional

049XESG02

Clay Uplands
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth >55cm
9. Rock <30% surface and <30% subsurface
10. clay >30% surface or >35% subsurface
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Provisional

049XESG03

Deep Rocky
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth >55cm
9. Rock >30% surface or >30% subsurface
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Provisional

049XESG04

Finer Uplands
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth >55cm
9. Rock <30% surface and <30% subsurface
10. Clay <30% surface and <35% subsurface
11. Sand <75% and texture is sandy loam or finer in surface & subsurface
12. Clay >20% and texture is finer than sandy loam in surface
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Provisional

049XESG05

Gypsum
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum >5% surface or >10% subsurface
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Provisional

049XESG06

Loamy Uplands
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth >55cm
9. Rock <30% surface and <30% subsurface
10. Clay <30% surface and <35% subsurface
11. Sand <75% and texture is sandy loam or finer in surface & subsurface
12. Clay <20% or texture is sandy loam or sandier in surface
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Provisional

049XESG07

Outcrops
i
Key Characteristics
1. Uplands
2. >75% bedrock outcrop
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Provisional

049XESG08

Riparian
i
Key Characteristics
1. Additional water
2. Perennial water
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Provisional

049XESG09

Saline Bottoms
i
Key Characteristics
1. Additional water
2. Ephemeral water
3. Subsurface EC >4
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Provisional

049XESG10

Saline Hills
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR >8
4. Uplands
5. <75% bedrock outcrop
6. Surface SAR <8
7. Gypsum <5% surface and <10% subsurface
8. Subsurface EC >8 or surface EC >4
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Provisional

049XESG11

Saline Uplands
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC >1.5 surface or >2 subsurface
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Provisional

049XESG12

Sandy Bottoms
i
Key Characteristics
1. Additional water
2. Ephemeral water
3. Subsurface EC <4
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Provisional

049XESG13

Sandy Uplands
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth >55cm
9. Rock <30% surface and <30% subsurface
10. Clay <30% surface and <35% subsurface
11. Sand >75% or texture is loamy sand or sandier in surface & subsurface
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Provisional

049XESG14

Shallow
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth: 30-55cm
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Provisional

049XESG15

Very Shallow
i
Key Characteristics
1. Uplands
2. <75% bedrock outcrop
3. Surface SAR <8
4. Gypsum <5% surface and <10% subsurface
5. Subsurface EC <8 and surface EC <4
6. EC <1.5 surface and <2 subsurface
7. Slope <35% or <40% surface rock
8. Depth <30cm
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Ecological site group keys

MLRA 49

I. Additional water

A. Perennial water ... 049XESG08 – Riparian

B. Ephemeral water

1 Subsurface EC >4 ... 049XESG09 – Saline Bottoms

2 Subsurface EC <4 ... 049XESG12 – Sandy Bottoms

II. Uplands

A. >75% bedrock outcrop ... 049XESG07 – Outcrops

B. <75% bedrock outcrop

1 Surface SAR >8 ... 049XESG10 – Saline Hills

2 Surface SAR <8

i. Gypsum >5% surface or >10% subsurface ... 049XESG05 – Gypsum

ii. Gypsum <5% surface and <10% subsurface

a. Subsurface EC >8 or surface EC >4 ... 049XESG10 – Saline Hills

b. Subsurface EC <8 and surface EC <4

1) EC >1.5 surface or >2 subsurface ... 049XESG11 – Saline Uplands

2) EC <1.5 surface and <2 subsurface

a) Slope >35% & >40% surface rock ... 049XESG01 – Breaks

b) Slope <35% or <40% surface rock

(1) Depth <30cm ... 049XESG15 – Very Shallow

(2) Depth: 30-55cm ... 049XESG14 – Shallow

(3) Depth >55cm

(a) Rock >30% surface or >30% subsurface ... 049XESG03 – Deep Rocky

(b) Rock <30% surface and <30% subsurface

(1) clay >30% surface or >35% subsurface ... 049XESG02 – Clay Uplands

(2) Clay <30% surface and <35% subsurface

(a) Sand >75% or texture is loamy sand or sandier in surface & subsurface ... 049XESG13 – Sandy Uplands

(b) Sand <75% and texture is sandy loam or finer in surface & subsurface

(1) Clay <20% or texture is sandy loam or sandier in surface ... 049XESG06 – Loamy Uplands

(2) Clay >20% and texture is finer than sandy loam in surface ... 049XESG04 – Finer Uplands

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