Major Land Resource Area 034B

Warm Central Desertic Basins and Plateaus

Accessed: 12/30/2024

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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

034BESG07

Outcrops
i
Key Characteristics
1. >75% bedrock ourcrop
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Provisional

034BESG08

Riparian
i
Key Characteristics
1. <75% bedrock outcrop
2. Perennial water
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Provisional

034BESG16

Arid Cool Breaks
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC <8 and surface EC <4
8. EC <1.5 surface and <2 subsurface
9. Slope >35% & >40% surface rock
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Provisional

034BESG17

Arid Cool Clay Uplands
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC <8 and surface EC <4
8. EC <1.5 surface and <2 subsurface
9. Slope <35% or <40% surface rock
10. Depth >55cm
11. Rock <30% surface and <30% subsurface
12. Clay >30% surface or >35% subsurface
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Provisional

034BESG18

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

034BESG19

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

034BESG20

Arid Cool Gypsum
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum >5% surface or >10% subsurface
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Provisional

034BESG21

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

034BESG22

Arid Cool Saline Bottoms
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Ephemeral water
5. Subsurface EC >4
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Provisional

034BESG23

Arid Cool Saline Hills
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR >8
6. <75% bedrock outcrop
7. Ephemeral water or uplands
8. Aridic moisture regime
9. Uplands
10. Surface SAR <8
11. Gypsum <5% surface and <10% subsurface
12. Subsurface EC >8 or subsurface EC >4
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Provisional

034BESG24

Arid Cool Saline Uplands
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC <8 and surface EC <4
8. EC >1.5 surface or >2 subsurface
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Provisional

034BESG25

Arid Cool Sandy Bottoms
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Ephemeral water
5. Subsurface EC <4
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Provisional

034BESG26

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

034BESG27

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

034BESG28

Arid Cool Very Shallow
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Aridic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC <8 and surface EC <4
8. EC <1.5 surface and <2 subsurface
9. Slope <35% or <40% surface rock
10. Depth <30cm
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Provisional

034BESG29

Semiarid Cool Breaks
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC<8 and surface EC<4
8. EC <1.5 surface and <2 subsurface
9. Slope >35% & >40% surface rock
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Provisional

034BESG30

Semiarid Cool Clay Uplands
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC<8 and surface EC<4
8. EC <1.5 surface and <2 subsurface
9. Slope <35% or <40% surface rock
10. Depth >55cm
11. Rock <30% surface and <30% subsurface
12. Clay >30% surface or >35% subsurface
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Provisional

034BESG31

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

034BESG32

Semiarid Cool Gypsum
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum >5% surface or >10% subsurface
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Provisional

034BESG33

Semiarid Cool Saline Hills
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Uplands
5. Surface SAR >8
6. <75% bedrock outcrop
7. Ephemeral water or uplands
8. Ustic moisture regime
9. Uplands
10. Surface SAR <8
11. Gypsum <5% surface and <10% subsurface
12. Subsurface EC>8 or surface EC>4
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Provisional

034BESG34

Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Uplands
5. Surface SAR <8
6. Gypsum <5% surface and <10% subsurface
7. Subsurface EC<8 and surface EC<4
8. EC >1.5 surface or >2 subsurface
9. <75% bedrock outcrop
10. Ephemeral water or uplands
11. Ustic moisture regime
12. Uplands
13. Surface SAR <8
14. Gypsum <5% surface and <10% subsurface
15. Subsurface EC<8 and surface EC<4
16. EC <1.5 surface and <2 subsurface
17. Slope <35% or <40% surface rock
18. Depth >55cm
19. Rock <30% surface and <30% subsurface
20. Clay <30% surface and <35% subsurface
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Provisional

034BESG35

Semiarid Cool Sandy Bottoms
i
Key Characteristics
1. <75% bedrock outcrop
2. Ephemeral water or uplands
3. Ustic moisture regime
4. Ephemeral water
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Provisional

034BESG36

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

034BESG37

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

MLRA 34B

I. >75% bedrock ourcrop ... 034BESG07 – Outcrops

II. <75% bedrock outcrop

A. Perennial water ... 034BESG08 – Riparian

B. Ephemeral water or uplands

1 Aridic moisture regime

i. Ephemeral water

a. Subsurface EC >4 ... 034BESG22 – Arid Cool Saline Bottoms

b. Subsurface EC <4 ... 034BESG25 – Arid Cool Sandy Bottoms

ii. Uplands

a. Surface SAR >8 ... 034BESG23 – Arid Cool Saline Hills

b. Surface SAR <8

1) Gypsum >5% surface or >10% subsurface ... 034BESG20 – Arid Cool Gypsum

2) Gypsum <5% surface and <10% subsurface

a) Subsurface EC >8 or subsurface EC >4 ... 034BESG23 – Arid Cool Saline Hills

b) Subsurface EC <8 and surface EC <4

(1) EC >1.5 surface or >2 subsurface ... 034BESG24 – Arid Cool Saline Uplands

(2) EC <1.5 surface and <2 subsurface

(a) Slope >35% & >40% surface rock ... 034BESG16 – Arid Cool Breaks

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

(1) Depth <30cm ... 034BESG28 – Arid Cool Very Shallow

(2) Depth: 30-55cm ... 034BESG27 – Arid Cool Shallow

(3) Depth >55cm

(a) Rock >30% surface or >30% subsurface ... 034BESG18 – Arid Cool Deep Rocky

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

(1) Clay >30% surface or >35% subsurface ... 034BESG17 – Arid Cool Clay Uplands

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

(a) Sand >75% or texture is loamy sand or sandier in surface & subsurface ... 034BESG26 – Arid Cool Sandy Uplands

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

(1) Clay <20% or texture is sandy loam or sandier in surface ... 034BESG21 – Arid Cool Loamy Uplands

(2) Clay >20% or texture is finer than sandy loam in surface ... 034BESG19 – Arid Cool Finer Uplands

2 Ustic moisture regime

i. Ephemeral water ... 034BESG35 – Semiarid Cool Sandy Bottoms

ii. Uplands

a. Surface SAR >8 ... 034BESG33 – Semiarid Cool Saline Hills

b. Surface SAR <8

1) Gypsum >5% surface or >10% subsurface ... 034BESG32 – Semiarid Cool Gypsum

2) Gypsum <5% surface and <10% subsurface

a) Subsurface EC>8 or surface EC>4 ... 034BESG33 – Semiarid Cool Saline Hills

b) Subsurface EC<8 and surface EC<4

(1) EC >1.5 surface or >2 subsurface ... 034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands

(2) EC <1.5 surface and <2 subsurface

(a) Slope >35% & >40% surface rock ... 034BESG29 – Semiarid Cool Breaks

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

(1) Depth <30cm ... 034BESG37 – Semiarid Cool Very Shallow

(2) Depth: 30-55cm ... 034BESG36 – Semiarid Cool Shallow

(3) Depth >55cm

(a) Rock >30% surface or >30% subsurface ... 034BESG31 – Semiarid Cool Deep Rocky

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

(1) Clay >30% surface or >35% subsurface ... 034BESG30 – Semiarid Cool Clay Uplands

(2) Clay <30% surface and <35% subsurface ... 034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands

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