Ecological site group DX035X04AESG03
San Juan River Corridor LRU Subset - Saline/Sodic Subgroup
Last updated: 11/01/2022
Accessed: 05/02/2024
Ecological site group description
Key Characteristics
- San Juan River Corridor. This LRU subset consists of landforms which drain directly into the San Juan River. Elevations are mostly under 1900 meters. Stratigraphy is varied, ranging from the Mancos to the Nacimiento formations. This LRU subset is distinct from the rest of 35.4 in that it provides irrigation water. Thus, upland landforms which contribute significant water are included.
- Sites that occur on "upland", water-shedding landforms. Elevated terraces are included in this group.
- Soils are > 50 cm to lithic or paralithic contact (root-restrictive bedrock).
- Sites that have saline and/or sodic soils. In these cases soils regularly have an EC > 4.0 and/or SAR > 10 or ESP > 15.
Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
Physiography
This site occurs on various water-shedding landforms, including elevated terraces and alluvial fans. Water-collecting landforms such as drainageways and floodplains are excluded, regardless of salinity/sodicity.
Soil features
Soils regularly have an EC > 4.0 and/or SAR > 10 or ESP > 15.
DX035XY402CO Sandy Saltdesert
R035XB016NM-Clay Loam Terrace (Sodic) 7-10"
R035XB022NM-Loamy Upland 6-10"p.z. sodic (Provisional)
R035XB034NM-Sandy Terrace 6-10" sodic
R035XB271AZ-Loamy Upland 6-10" p.z. Saline-Sodic
R035XB274AZ-Sandy Loam Upland 6-10" p.z. Saline
R035XB276AZ-Siltstone Upland 6-10" p.z. Saline
R035XB277AZ-Siltstone Upland 6-10" p.z. Limy
R035XB278AZ-Loamy Upland 6-10" p.z. Saline, Gypsic
R035XB279AZ-Clay Loam Upland 6-10" p.z. Sodic, Gypsic
R035XC326AZ-Sandy Loam Upland 10-14" p.z. Saline
DX035X04A403-Clayey Salt Desert
Major Land Resource Area
MLRA 035X
Colorado Plateau
Subclasses
- R035XB008NM–Sodic Slopes
- R035XB016NM–Clay Loam Terrace (Sodic) 7-10"
- R035XB022NM–Loamy Upland 6-10"p.z. sodic
- R035XB034NM–Sandy Terrace 6-10" sodic
- R035XB271AZ–Loamy Upland 6-10" p.z. Saline-Sodic
- R035XB274AZ–Sandy Loam Upland 6-10" p.z. Saline
- R035XB276AZ–Siltstone Upland 6-10" p.z. Saline
- R035XB277AZ–Siltstone Upland 6-10" p.z. Limy
- R035XB278AZ–Loamy Upland 6-10" p.z. Saline, Gypsic
- R035XB279AZ–Clay Loam Upland 6-10" p.z. Sodic, Gypsic
- R035XC326AZ–Sandy Loam Upland 10-14" p.z. Saline
- R035XY402CO–Sandy Saltdesert
- R035XY403CO–Clayey Salt Desert
Correlated Map Unit Components
22960373, 22960078, 22960027, 22960024, 22959953, 22959952, 22960106, 22960268, 22960259, 22960039, 22960033, 22960029, 22960042, 22960018, 22960011, 22960007, 22960200, 22960222, 22960220, 22960223, 22960066, 22856794, 22856795, 22856796, 22933850, 23435853
Stage
Provisional
Contributors
Curtis Talbot
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