Major Land Resource Area 036X
Southwestern Plateaus, Mesas, and Foothills
Accessed: 11/21/2024
Previous
Sections
Next
Next steps
-
1
Select an ecological site
Select an ecological site using the list, keys, photos, briefcase, or quick search option located on this page. -
2
Explore the ecological site description
Next, learn more about the selected ecological site and its characteristic dynamics by browsing the ecological site description and exploring alternative state and transition model formats.
Ecological site list
Tools
Search
Filter by
interactive key
precipitation
frost free days
more..
clear all
Sort by
id
name
stage
Viewing 20 of 54
View all
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Stony, cobbly or channery modifier on surface texture
- Slope 1-35%; Soils are very shallow to shallow and non-skeletal; soil surface is loam, channery loam or clay loam. Landforms are broad mesas, cuestas, and hills interspersed with numerous deep canyons and dry washes
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is greater than 12" in depth
- Water table between 12-72" in depth
- Sites not influenced by salts and/or sodium
- Coarse-loamy, sandy skeletal, ashy or fine-loamy over sandy or sandy-skeletal in soils control section; if fine-loamy over sandy or sandy-skeletal there is strongly contrasting textural stratification as a restriction kind and water table is above 12" when fine-loamy over sandy or sandy-skeletal in the control section
- Site has a water table at 12-48” ; slopes 0-3%; soils are deep; Surface textures are a very fine sandy loam, fine sandy loam, very gravelly coarse sand, and ashy loam; subsoils textures are coarse-loamy. Landforms are flood plains, stream terraces, flood-plain steps on valley floors, natural levees flood plains on valley floors and swales
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes ≥ 25%
- Surface texture modifier of gravelly, very gravelly extremely gravelly, or para-gravelly, very cobbly, extremely cobbly or ashy
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section)). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes ≥ 25%
- Surface texture modifier of gravelly, very gravelly extremely gravelly, or para-gravelly, very cobbly, extremely cobbly or ashy
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
- Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface.
- Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes are 3-25%; Soils are skeletal and deep. Soil surface textures are gravelly to very gravelly loam or cobbly loam with subsoil that are loams to clay loam. Landforms are rolling hills, divides, and ridges
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Skeletal (≥35% rock fragments in soil profile-may or may not have gravels, cobbles, stones and channers on the surface)
- Slopes 10-55%; soils are very shallow to moderately deep and skeletal; Surface soil textures are loams to clay with loamy subsoil. Landforms are scarp slope (along canyon edges, side-slopes, ridges, and benches)
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes 10-55%; soils are very shallow to moderately deep and skeletal; Surface soil textures are loams to clay with loamy subsoil. Landforms are scarp slope (along canyon edges, side-slopes, ridges, and benches)
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Clayey subsoils (Fine, clayey. Fine silty in particle control section; >35% clay)
- Slopes are 0-15%; Soils are moderately deep to deep; soil surface loam, clay loam, silty clay loam, and silty clay over clayey subsoil with textures of clay loam, clay to silty clay loam or silty clay. Landforms are stream terraces, valley floors, fan remnants, alluvial fans, dipslopes on cuestas, mesas, hills, and valley floors
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section)). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes 3-20%; soils are moderately deep and fine-loamy. Surface soil textures are loam. The subsoil is loamy. Landforms are hills
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Calcareous (very calcareous throughout the profile);
- Slopes are 3-8%; soils are deep; surface is generally a silt loam and subsoil textures range from loam to silt loam. Landforms are gently alluvial fans and valley sides
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section)). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes are 1-15%; surface textures range from loam, gravelly loam, loamy fine sand, fine sandy loam, sandy loam, silt loam, and clay loam; Subsoil ranges from loam to clay loam (loamy); Found on mesas, plateaus, fan remnants, terraces, dipslopes on cuestas, and valley sides
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Stony, cobbly or channery modifier on surface texture
- Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- No surface texture modifier or not as above in 18a or 18b
- Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Skeletal (≥35% rock fragments in soil profile-may or may not have gravels, cobbles, stones and channers on the surface)
- Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is less than 12" in depth
- Soil is fine-loamy in control section
- Water table 6-48” in depth; slopes 0-5%; soils are deep, Surface textures are silty clay loam, clay loam, loam, and gravelly loam with a subsoil of stratified loam, silt loam, silty clay loam, clay loam, very gravelly sand, and gravelly sand. Landform is in a stream terrace, valley floors and alluvial flats positions. This site is subirrigated. It may occur adjacent to streams, springs, and seeps
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is greater than 12" in depth
- Water table between 12-72" in depth
- Sites not influenced by salts and/or sodium
- Soils are fine-loamy, fine or fine-loamy over sandy or sandy-skeletal in the soils control section
- Water table 6-48” in depth, slopes 0-5%, soils are deep. Surface textures are silty clay loam, clay loam, loam, and gravelly loam with a subsoil of stratified loam, silt loam, silty clay loam, clay loam, very gravelly sand, and gravelly sand. Landform is in a stream terrace, valley floors and alluvial flats positions. This site is subirrigated. It may occur adjacent to streams, springs, and seeps
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is greater than 12" in depth
- Water table between 12-72" in depth
- Sites influences by salts and/or sodium
- Water table 4-50” in depth; slopes are 0-5%; soils are deep, Surface textures are loam, clay loam, or silty clay with a subsoil of clay or clay loam. Landform is nearly level to gently sloping playas, alluvial fans, floodplains, lake plains, stream terraces, and lake terraces. It commonly forms a narrow band adjacent to a flowing stream
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is greater than 12" in depth
- Water table is greater than 6 ft. (72") in depth
- Sites influences by salts and/or sodium
- Water table 72”+ in depth; slopes 0-5%; soils are deep, high in sodium. Surface textures are loam, clay loam, or silty clay with a subsoil of clay or clay loam. Landform is nearly level to gently sloping playas, alluvial fans, floodplains, lake plains, stream terraces, and lake terraces. It commonly forms a narrow band adjacent to a flowing or intermittent stream
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
- Slopes are 1-15%; soils are deep to very deep; Surface textures are loamy sand, gravelly loamy sand, loamy fine sand, fine sandy loam and sandy loam with sandy subsoil. Landforms are nearly level to gently sloping landscapes on dunes, fan remnant and alluvial fans
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
- Slopes are 1-25%; soils are deep; Surface textures are loamy sand, loamy fine sand, and sandy loam with sandy subsoil. Landforms are plateaus, mesas, upland plains
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Surface texture modifier used (ie. gravelly, cobby)
- Slopes 3-20%; soils are very shallow to shallow and non-skeletal; soil surface gravelly loam or gravelly fine sandy loam; gravelly sandy loam; subsoil is sandy loams to loams. Landforms located adjacent to narrow ridges, hills, breaks structural benches and mesas of bedrock controlled landscapes
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- No surface texture modifier or not as above in 18a or 18b
- Slopes 1-25%; soils are non-skeletal; soil surface is sandy loam to loam with a loamy subsoil from basalt and eolian materials. Landform is ridges, hills, interfluves on undulating plateaus, escarpments on cuestas, and escarpments on mesas
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Shallow soils (≤ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Stony, cobbly or channery modifier on surface texture
- Slopes 1-55%; very shallow to shallow soils and non-skeletal; very cobbly loam, very cobbly sandy loam, loam, cobbly clay loam, and channery clay loam over a clayey subsoil. Bedrock can be sandstone, shale or basalt. Landforms narrow ridges, hills, breaks and mesas of bedrock controlled landscapes
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Clayey subsoils (Fine, clayey. Fine silty in particle control section; >35% clay)
- Slopes are 1-15%; Soils are moderately deep to deep; soil surface range from very fine sandy loam to clay loam. Subsoil is fine-textured. Landforms are nearly level to undulating plains, hills, ridges, and mesa tops, although it may occur on more rolling landscapes
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is greater than 12" in depth
- Water table is greater than 6 ft. (72") in depth
- Sites not influenced by salts and/or sodium
- Soils are deep to very deep soils that have surface textures of silty clay loam, clay loam, silt loam, and fine sandy loam with loamy subsoil. Landforms are flood plains, alluvial fans, valley floors, valley flats, stream terraces, broad valley bottoms, depressions (swales) and other low-lying areas which receive runoff moisture from adjacent sites. This site is enhanced by runoff during periods of high runoff (intermittent)
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Soils with ≥ 18% clay in the particle control section
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section)). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes 0-15%; soils are deep to very deep and skeletal and non-skeletal; Surface soil textures are cobbly loam, or loam. Subsoils are loamy. Landforms are nearly level alluvial fans, stream terraces, plateaus, mesas and volcanic cones
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
- Slopes 0-15%; soils are deep to very deep and skeletal and non-skeletal; Surface soil textures are cobbly loam, or loam. Subsoils are loamy. Landforms are nearly level alluvial fans, stream terraces, plateaus, mesas and volcanic cones
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes ≥ 25%
- No surface texture modifier
- Slopes are 15-40%. Soils are moderately deep to deep; Surface textures are loamy fine sand, loamy very fine sand, sandy loam and loamy sand with sandy subsoil. Landforms are hills, ridges, escarpments on cuestas, and escarpments on plateaus
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
- Slopes are 15-40% Soils are moderately deep to deep; Surface textures are loamy fine sand, loamy very fine sand, sandy loam and loamy sand with sandy subsoil. Landforms are hills, ridges, escarpments on cuestas, and escarpments on plateaus
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes ≥ 25%
- Surface texture modifier of gravelly, very gravelly extremely gravelly, or para-gravelly, very cobbly, extremely cobbly or ashy
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, or fine sandy loam)
- Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal (<35% rock fragments in soil profile)
- Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
- Slopes are 25% or less; non-skeletal
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
- Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils without a water table an not in a run-position
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
- Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface.
- Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
-
i
Key Characteristics
- Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
- Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
- Water table is less than 12" in depth
- Soil is coarse-loamy in control section
- Soils are ≥ 40" in depth; surface textures range from fine sandy loam and silt loam; Landforms are abandoned channels on flood plains of valley floors with intermittent streams
-
i
Key Characteristics
- Receive extra water beyond normal precipitation and are high in salinity and alkaline, mesic
- Site with water table above 60”
- Precipitation 11-16”; Site has water table 30-60” and without run-in. Soils are deep. Soil surface textures are extremely cobbly sand and loamy fine sand. Landforms are flood plain, flood plain step and terrace
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
- Precipitation is 12-14”; soils are moderately deep to deep. Soil surface textures are fine sandy loams, sandy loam and sandy clay loam with loamy subsoil; non-saline and neutral to slightly alkaline. Occurs on structural benches, mesas edges and cuestas, but may also occur on plateaus, hills and ridges. Example soil – Plumasano & Plumasano Family
-
i
Key Characteristics
- Receive extra water beyond normal precipitation and are high in salinity and alkaline, mesic
- Site with water table above 60”
- Precipitation is 12-16”; High water table with deep gleyed soils; soil textures from loam or clay loam and subsoils are loamy textured, poorly drained. Landforms are gently sloping to flat in lowland position (draws, drainageways, swales, flood plains, flood-plain steps, and terraces)
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Shallow soils (≤20" in depth)
- Slopes are less than 25%
- Soil Surface is sandy clay loam, silty clay loam, clay loam
- Soils surface sandy clay loams, clay loams, and silty clay loams. Subsoil is clay textured (sandy clay loam, clay loam, silty clay loam). Parent materials are shale or interbedded sandstone and shale. Landforms are canyon walls, sideslopes and edges of mesas, pediments and dipslopes
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Shallow soils (≤20" in depth)
- Slopes are steeper than 25%
- Surface textures very boulder/very stony sandy clay loams, clay loams, and very stony loam. Subsoil textures can be sandy clay loam, clay loam, and silty clay loam and can have gravels, stones and boulders in it. Landforms are steep and very steep side-slopes of canyons and hills
-
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Shallow soils (≤20" in depth)
- Slopes are less than 25%
- Soil Surface is fine sandy loam, sandy loam and loams
- Soil Surface is fine sandy loam, sandy loam and loams. Landforms are dipslopes, dipslopes on cuestas, cuestas, and eroded dipslopes on cuestas
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Very shallow to Shallow soils (≤ 20" in depth)
- Slopes are less than 25%
- Precipitation is 12-16”; slopes 3 to 25%; soils are very shallow to shallow; Surface textures are fine sandy loam to loam, some gravels may be present on the surface. Subsoils are sandy clay loam, clay loam or loam that can have gravels up to 45%. Landforms are dipslopes, mountain slopes and structural benches
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 15/16-18" ------ Upper Foothills/lower Mountain Zones – Southern Colorado and Northern Mexico (Utah Juniper representative species, Mesa Verde NP area)
- Shallow soils (≤ 20" in depth)
- Precipitation is 15-18”; slopes are 3-25%; soils are shallow; Soil surfaces are loamy sand, fine sandy loam, loam, cobbly fine sandy loam, gravelly sandy loam or channery fine sandy loam. Subsoil can be sandy clay loam, fine sandy loam, loam, and/or clay loam. Landforms are mesa, dissected dipslopes, dissected dipslopes on cuestas, and structural benches. Mesa Verde NP Area
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 15/16-18" ------ Upper Foothills/lower Mountain Zones – Southern Colorado and Northern Mexico (Utah Juniper representative species, Mesa Verde NP area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Precipitation is 15-18”; slopes 1-15%; Surface soils are loam or gravelly sandy loam; subsoil is sandy clay loam or clay loam from calcareous eolian material. Shallow carbonatic calcic layer is common. Landform dissected dipslopes on cuestas, and mesas
-
i
Key Characteristics
- Receive extra water beyond normal precipitation and are high in salinity and alkaline, mesic
- Site with water table above 60”
- Precipitation is 9-15”; High water table with deep gleyed soils; soil textures from clay loam and silty clay loam, poorly drained; strongly saline-alkaline. Landforms are gently sloping to flat in lowland position (drainageways, alluvial fans, and flood plain)
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
- 1-15% slopes; Soils are moderately deep to deep. Surface textures are loam; subsoil can be loam, silt loam, sandy clay loam or clay loam. Landforms are hills, mesas, structural benches, alluvial fans and old terraces
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal soils (≥35% rock fragments in the profile)
- Not steep slopes (≤30% slopes)
- Soil surface very cobbly loams, very gravelly loam, gravelly loam, loam, and fine sandy loam with sandy clay loam or clay loam subsurface with rock fragments. Landforms are escarpments, moraines, fan remnants, dipslopes, outwash fans, structural benches, and colluvial aprons
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils textures are heavy clay loams (≥35%+ clay), silty clay loam and clays (Fine, clayey. Fine silty in particle control section; ≥35% clay)
- Precipitation is 12-16”; slopes are 1-30%; soils are moderately deep to very deep; Soils surface textures are silty clay loam or clay loam. Subsoils are clay loam, silty clay loam, silty clay and clay from marine shale. Landforms hills, alluvial fans, pediments, complex landslides, terraces, fan remnants, fans, and valleys
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
- Precipitation is 12-14”; Soils are moderately deep to very deep; Soils are fine sandy loams, sandy loam and sandy clay loam with a loamy subsoil; non-saline and neutral to slightly alkaline. Landforms are structural benches, plateaus, hills and mesas. Example soil – Plumasano & Nomrah
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
- Precipitation is 12-14”; Soils are moderately deep to deep; soil surface textures are fine sandy loams and sandy loam with loamy subsoil. Landforms are structural benches and mesas edges, but may occur on cuestas, plateaus, hills and ridges. Example soil – Plumasano
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are sandy loam, fine sandy loam, light loam (≤18% clay), very fine sandy loam, loamy fine sand, sand(≤18% clay in soil profile)
- Slopes 0-12%; Soils are deep; Soils are fine sandy loams, very fine sandy loams, and loamy fine sands; subsoil is loamy sand, sandy loam, sand or light loam textures. Landforms fan remnants, dunes, terraces, structural benches
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Very shallow to Shallow soils (≤ 20" in depth)
- Slopes are less than 25%
- Precipitation is 12-14”; slopes 3 to 10%; Soils surface textures are fine sandy loams, flaggy fine sandy loam and channery fine sand with a loamy subsoil and may have up to 15-20% flagstones and/or channers on the surface and in the profile. Landforms are plateaus, structural benches, mesa tops, ledges, escarpments and cuestas slopes
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Very shallow to Shallow soils (≤ 20" in depth)
- Slopes are less than 25%
- Precipitation is 12-14”; slopes 2 to 20%; Soils surface textures are fine sandy loams to very fine sandy loams with loamy subsoil; non-saline, and moderately alkaline. Landforms are structural benches and cuestas
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Moderately deep to very deep soils (≥20" in depth)
- Soil Surface is fine sandy loam, very fine sandy loam
- Subsoil is sandy clay loam, clay loam; Parent materials are mainly from sandstone or sandstone and shale. Landforms are structural benches, dipslopes, dipslopes on cuestas, alluvial fans, mesas, hills, valley floor and terraces
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Moderately deep to very deep soils (≥20" in depth)
- Soil Surface is fine sandy loam, very fine sandy loam
- Subsoil is sandy loam. Parent materials are mainly from sandstone. Landforms are alluvial fans, fan terraces, mesas, and valley floors
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Moderately deep to very deep soils (≥20" in depth)
- Soil Surface is silty clay loam, silty clay or clay loam
- Soils are deep; Soil surface silty clay loam, silty clay or clay loam; Subsoil are silty clay loam, clay loam or silty clay. Parent materials are mainly from cretaceous age shale (Manco Shale). Landforms are alluvial fans, terraces and fan terraces
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Skeletal soils (≥35% rock fragments in the profile)
- Steep slopes ≥30%
- Precipitation is 12-14”; skeletal soils (35%+ rock fragments); soils are very shallow to deep. Slopes between 50-75%; soils surface textures are very gravelly loamy sand, extremely channery fine sandy loam, stony fine sandy loam and from calcareous sandstone with loamy subsoil. Landforms are mesa escarpments, hill, and ridges
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 15/16-18" ------ Upper Foothills/lower Mountain Zones – Southern Colorado and Northern Mexico (Utah Juniper representative species, Mesa Verde NP area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Precipitation is 15-18”; slope is 0-20%; soil surface is cobbly loam, or gravelly loam; subsoil is loam, sandy clay loam or clay loam and commonly very cobbly or very gravelly. Soils have argillic and calcic horizons. Landforms are generally nearly level to undulating mesas, ridge tops, old terraces, and slope breaks
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Moderately deep to very deep soils (≥ 20" in depth)
- Non-skeletal soils (≤35% rock fragments in the profile)
- Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
- Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
- Slopes 0-15%; Soils are deep to very deep. Soil surface ranges from sandy loam to a loam. Subsoil textures are clay loam, sandy clay loam, or loam. Landforms are concave upland valley bottoms and floors, stream terraces, toe-slopes, and alluvial fans. It is dissected in many places by gullies and draws running down the valleys
-
i
Key Characteristics
- Receive extra water beyond normal precipitation and are high in salinity and alkaline, mesic
- Site has a water table below 60”
- Precipitation is 12-16”; Soils are deep; Site has a water table below 60”; Soils have loam and clay loam. Subsoils may have stratified layers. Soils can contain some alkali. Landforms are drainageways, draws, floodplains, and alluvial fans in narrow canyon bottoms with intermittent drainages flowing through them
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Shallow soils (≤20" in depth)
- Slopes are less than 25%
- Soil Surface is sandy clay loam, silty clay loam, clay loam
- Soils are shallow to moderately deep. Surface textures are silty clay loam over subsoils that are silty clay or clay loam. Parent material is alluvium and residuum from Mancos and Morrison shale. Landforms are low alluvial terraces, ridges, hills, structural benches, and alluvial fans
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
- Moderately deep to very deep soils (≥20" in depth)
- Soil Surface is silty clay loam, silty clay or clay loam
- Soils are shallow to moderately deep. Surface textures are silty clay loam over subsoils that are silty clay or clay loam. Parent material is alluvium and residuum from Mancos and Morrison shale. Landforms are low alluvial terraces, ridges, hills, structural benches and alluvial fans
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
- Very shallow to Shallow soils (≤ 20" in depth)
- Slopes are steeper than 25%
- Soil surface is cobbly fine sandy loam, very gravelly clay loam, very stony sandy clay loam, very channery clay loam, and extremely gravelly loam. Landforms are very steep side slopes, canyon walls, dissected dipslopes, dissected dipslopes on cuestas, and mountain slopes and ridges
-
i
Key Characteristics
- Sites with no water table or not run in sites
- Temperature regime is mesic and annual precipitation is 15/16-18" ------ Upper Foothills/lower Mountain Zones – Southern Colorado and Northern Mexico (Utah Juniper representative species, Mesa Verde NP area)
- Shallow soils (≤ 20" in depth)
- Precipitation is 15-18”; slopes are 3-25%; soils are shallow. Surface soil textures are very fine sandy loam, sandy clay loam to clay loam and subsoil is gravelly fine sandy loam, very gravelly clay loam, or clay loam. Landforms are hills, mesas, dissected dipslopes, and dissected dipslopes on cuestas.
Ecological site map
Basemap
Topo
Road
Aerial
Hybrid
Find me
Find point
Full screen
Zoom in to display soil survey map units for an area of interest, and zoom out to display MLRAs. Select a map unit polygon to view ecological sites correlated to that map unit. View a brief description of an ecological site by clicking on its name in the map popup. Soil survey correlations may not be accurate, and ecological site classification of a location should always be verified in the field. Each selection may require the transfer of several hundred KB of data.
Ecological site keys
MLRA 36 Key to Keys
I.
Site located in New Mexico portion of MLRA 36.
... Key 2 – New Mexico MLRA 36 Ecological Site Key
II.
Site located in Colorado or Utah portion of MLRA 36.
... Key 3 – Colorado & Utah MLRA 36 Ecological Site Key
New Mexico MLRA 36 Ecological Site Key
1a.
Temperature regime is mesic and annual precipitation is 10-16” and mesic - (36.2 NM)
2a.
Soils receive extra beyond normal precipitation water either by having a water table or being in a run-in position
3a.
Water table is less than 12" in depth
4a.
Soil is coarse-loamy in control section
5a.
Soils are ≥ 40" in depth; surface textures range from fine sandy loam and silt loam; Landforms are abandoned channels on flood plains of valley floors with intermittent streams
... R036XB138NM – Marshy
5b.
Site not as above. Unclassified
4b.
Soil is fine-loamy in control section
6a.
Water table 6-48” in depth; slopes 0-5%; soils are deep, Surface textures are silty clay loam, clay loam, loam, and gravelly loam with a subsoil of stratified loam, silt loam, silty clay loam, clay loam, very gravelly sand, and gravelly sand. Landform is in a stream terrace, valley floors and alluvial flats positions. This site is subirrigated. It may occur adjacent to streams, springs, and seeps
... R036XB008NM – Meadow
6b.
Site not as above. Unclassified
4c.
Site not as above. Unclassified.
3b.
Water table is greater than 12" in depth
7a.
Water table is greater than 6 ft. (72") in depth
8a.
Sites not influenced by salts and/or sodium
9a.
Soils are deep to very deep soils that have surface textures of silty clay loam, clay loam, silt loam, and fine sandy loam with loamy subsoil. Landforms are flood plains, alluvial fans, valley floors, valley flats, stream terraces, broad valley bottoms, depressions (swales) and other low-lying areas which receive runoff moisture from adjacent sites. This site is enhanced by runoff during periods of high runoff (intermittent)
... R036XB017NM – Swale
9b.
Site not as above. Unclassified.
8b.
Sites influences by salts and/or sodium
10a.
Water table 72”+ in depth; slopes 0-5%; soils are deep, high in sodium. Surface textures are loam, clay loam, or silty clay with a subsoil of clay or clay loam. Landform is nearly level to gently sloping playas, alluvial fans, floodplains, lake plains, stream terraces, and lake terraces. It commonly forms a narrow band adjacent to a flowing or intermittent stream
... R036XB010NM – Salty Bottomland
10b.
Site not as above. Unclassified
7b.
Water table between 12-72" in depth
11a.
Sites influences by salts and/or sodium
12a.
Water table 4-50” in depth; slopes are 0-5%; soils are deep, Surface textures are loam, clay loam, or silty clay with a subsoil of clay or clay loam. Landform is nearly level to gently sloping playas, alluvial fans, floodplains, lake plains, stream terraces, and lake terraces. It commonly forms a narrow band adjacent to a flowing stream
... R036XB009NM – Salt Meadow
12b.
Site not as above. Unclassified
11b.
Sites not influenced by salts and/or sodium
13a.
Soils are fine-loamy, fine or fine-loamy over sandy or sandy-skeletal in the soils control section
14a.
Water table 6-48” in depth, slopes 0-5%, soils are deep. Surface textures are silty clay loam, clay loam, loam, and gravelly loam with a subsoil of stratified loam, silt loam, silty clay loam, clay loam, very gravelly sand, and gravelly sand. Landform is in a stream terrace, valley floors and alluvial flats positions. This site is subirrigated. It may occur adjacent to streams, springs, and seeps
... R036XB008NM – Meadow
14b.
Site not as above. Unclassified
13b.
Coarse-loamy, sandy skeletal, ashy or fine-loamy over sandy or sandy-skeletal in soils control section; if fine-loamy over sandy or sandy-skeletal there is strongly contrasting textural stratification as a restriction kind and water table is above 12" when fine-loamy over sandy or sandy-skeletal in the control section
15a.
Site has a water table at 12-48” ; slopes 0-3%; soils are deep; Surface textures are a very fine sandy loam, fine sandy loam, very gravelly coarse sand, and ashy loam; subsoils textures are coarse-loamy. Landforms are flood plains, stream terraces, flood-plain steps on valley floors, natural levees flood plains on valley floors and swales
... F036XA005NM – Riverine Riparian
15b.
Site not as above. Unclassified.
13c.
Site not as above. Unclassified.
2b.
Soils without a water table an not in a run-position
16a.
Shallow soils (≤ 20" in depth)
17a.
Non-skeletal (<35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
18a.
Surface texture modifier used (ie. gravelly, cobby)
19a.
Slopes 3-20%; soils are very shallow to shallow and non-skeletal; soil surface gravelly loam or gravelly fine sandy loam; gravelly sandy loam; subsoil is sandy loams to loams. Landforms located adjacent to narrow ridges, hills, breaks structural benches and mesas of bedrock controlled landscapes
... R036XB013NM – Shallow Gravelly
19b.
Site not as above. Unclassified
18b.
Stony, cobbly or channery modifier on surface texture
1)
Slopes 1-55%; very shallow to shallow soils and non-skeletal; very cobbly loam, very cobbly sandy loam, loam, cobbly clay loam, and channery clay loam over a clayey subsoil. Bedrock can be sandstone, shale or basalt. Landforms narrow ridges, hills, breaks and mesas of bedrock controlled landscapes
... R036XB015NM – Shallow Savanna
2)
Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
... R036XB007NM – Malpais
3)
Slope 1-35%; Soils are very shallow to shallow and non-skeletal; soil surface is loam, channery loam or clay loam. Landforms are broad mesas, cuestas, and hills interspersed with numerous deep canyons and dry washes
... F036XA001NM – Pinyon Upland
4)
Site not as above. Unclassified
18c.
No surface texture modifier or not as above in 18a or 18b
1)
Slopes 1-25%; soils are non-skeletal; soil surface is sandy loam to loam with a loamy subsoil from basalt and eolian materials. Landform is ridges, hills, interfluves on undulating plateaus, escarpments on cuestas, and escarpments on mesas
... R036XB014NM – Shallow Loam
2)
Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
... R036XB007NM – Malpais
3)
Site not as above. Unclassified
17b.
Skeletal (≥35% rock fragments in soil profile-may or may not have gravels, cobbles, stones and channers on the surface)
1)
Slopes 1-15%; soils are skeletal and not skeletal; soil surface are loam, stony to very stony loam, very cobbly loam, fine sandy loam, very cobbly fine sandy loam, stony silt loam, stony silty clay loam, and cobbly silty clay loam; Parent materials are basalt influences but can have sometimes influence from sandstone and/or shale. Landforms are mesas, lava plateaus, lava flows, lava flows on valley floors, and ridges
... R036XB007NM – Malpais
2)
Slopes 10-55%; soils are very shallow to moderately deep and skeletal; Surface soil textures are loams to clay with loamy subsoil. Landforms are scarp slope (along canyon edges, side-slopes, ridges, and benches)
... R036XB001NM – Breaks
3).
Site not as above. Unclassified
16b.
Moderately deep to very deep soils (≥ 20" in depth)
19a.
Non-skeletal (<35% rock fragments in soil profile)
20a.
Calcareous (very calcareous throughout the profile);
21a.
Slopes are 3-8%; soils are deep; surface is generally a silt loam and subsoil textures range from loam to silt loam. Landforms are gently alluvial fans and valley sides
... R036XB005NM – Limy
21b.
Site not as above. Unclassified.
20b.
Non- calcareous (Calcium carbonate equivalent is <10% within 40” in depth)
22a.
Slopes ≥ 25%
23a.
No surface texture modifier
24a.
Slopes are 15-40%. Soils are moderately deep to deep; Surface textures are loamy fine sand, loamy very fine sand, sandy loam and loamy sand with sandy subsoil. Landforms are hills, ridges, escarpments on cuestas, and escarpments on plateaus
... R036XB111NM – Sandy Slopes
24b.
Site not as above. Unclassified
23b.
Surface texture modifier of gravelly, very gravelly extremely gravelly, or para-gravelly, very cobbly, extremely cobbly or ashy
24a.
Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
1)
Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
... F036XB133NM – Pinyon-Utah juniper/skunkbush sumac
2)
Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
... F036XA136NM – Pinyon-Utah juniper/Apache plume
3)
Site not as above. Unclassified
24b.
Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, or fine sandy loam)
25a.
Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
... R036XB132NM – Gravelly Hills
25b.
Site not as above. Unclassified
24c.
Site not as above. Unclassified
23c.
Site not as above. Unclassified
22b.
Slopes are 25% or less; non-skeletal
26a.
Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface
(1)
Slopes are 1-25%; soils are deep; Surface textures are loamy sand, loamy fine sand, and sandy loam with sandy subsoil. Landforms are plateaus, mesas, upland plains
... R036XB012NM – Sandy Savanna
(2)
Slopes are 15-40% Soils are moderately deep to deep; Surface textures are loamy fine sand, loamy very fine sand, sandy loam and loamy sand with sandy subsoil. Landforms are hills, ridges, escarpments on cuestas, and escarpments on plateaus
... R036XB111NM – Sandy Slopes
(3)
Slopes are 1-15%; soils are deep to very deep; Surface textures are loamy sand, gravelly loamy sand, loamy fine sand, fine sandy loam and sandy loam with sandy subsoil. Landforms are nearly level to gently sloping landscapes on dunes, fan remnant and alluvial fans
... R036XB011NM – Sandy
(4)
Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
... R036XB132NM – Gravelly Hills
(5)
Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
... F036XB133NM – Pinyon-Utah juniper/skunkbush sumac
(6)
Site not as above. Unclassified
26b.
Soils with ≥ 18% clay in the particle control section
27a.
Clayey subsoils (Fine, clayey. Fine silty in particle control section; >35% clay)
(1)
Slopes are 0-15%; Soils are moderately deep to deep; soil surface loam, clay loam, silty clay loam, and silty clay over clayey subsoil with textures of clay loam, clay to silty clay loam or silty clay. Landforms are stream terraces, valley floors, fan remnants, alluvial fans, dipslopes on cuestas, mesas, hills, and valley floors
... R036XB002NM – Clayey
(2)
Slopes are 1-15%; Soils are moderately deep to deep; soil surface range from very fine sandy loam to clay loam. Subsoil is fine-textured. Landforms are nearly level to undulating plains, hills, ridges, and mesa tops, although it may occur on more rolling landscapes
... R036XB016NM – Loamy Savanna
(3)
Site not as above. Unclassified
27b.
Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section)). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
(1)
Slopes are 1-15%; surface textures range from loam, gravelly loam, loamy fine sand, fine sandy loam, sandy loam, silt loam, and clay loam; Subsoil ranges from loam to clay loam (loamy); Found on mesas, plateaus, fan remnants, terraces, dipslopes on cuestas, and valley sides
... R036XB006NM – Loamy
(2)
Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
... F036XA136NM – Pinyon-Utah juniper/Apache plume
(3)
Slopes 3-20%; soils are moderately deep and fine-loamy. Surface soil textures are loam. The subsoil is loamy. Landforms are hills
... R036XB003NM – Gravelly Fan
(4)
Slopes 0-15%; soils are deep to very deep and skeletal and non-skeletal; Surface soil textures are cobbly loam, or loam. Subsoils are loamy. Landforms are nearly level alluvial fans, stream terraces, plateaus, mesas and volcanic cones
... R036XB018NM – Stony Loam
(5)
Site not as above. Unclassified
27c.
Site not as above. Unclassified
19b.
Skeletal (>35% rock fragments in soil profile-can have gravels, cobbles, stones and channers on the surface)
28a.
Sandy subsoils (Coarse loamy or Sandy in the particle control section; <18% clay) (Loamy sand, loamy fine sand, loamy very fine sandy, sandy loam, fine sandy loam. Some may have a loam soil surface.
1)
Slopes are 1-65%; Soils are moderately deep to deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly sandy loam, very gravelly loam, loam, para-gravelly-ashy loamy coarse sand, and extremely cobbly coarse sandy loam with a sandy subsoil. Landform is mesas, hills, fan piedmonts, valley sides, plateaus, mountain slopes, structural benches, breaks and ridges
... F036XB133NM – Pinyon-Utah juniper/skunkbush sumac
2)
Slopes are (10-65%); Soils are very deep and skeletal and non-skeletal. Surface texture of gravelly to very gravelly fine sandy loam, very gravelly sandy loam, very cobbly loam, or gravelly loam with a sandy subsoil. Landforms are escarpments, fan piedmonts, mesas, hills, ridges and knolls
... R036XB132NM – Gravelly Hills
3)
Site not as above. Unclassified
28b.
Loamy subsoils (loam, clay loam (loamy or fine loamy in particle control section (18-35% clay))). Can have surface textures of sandy loam, fine sandy loam, sandy clay loam, loam, silt loam, clay loam, and loamy fine sand.
1)
Slopes 10-55%; soils are very shallow to moderately deep and skeletal; Surface soil textures are loams to clay with loamy subsoil. Landforms are scarp slope (along canyon edges, side-slopes, ridges, and benches)
... R036XB001NM – Breaks
2)
Slopes are 3-25%; Soils are skeletal and deep. Soil surface textures are gravelly to very gravelly loam or cobbly loam with subsoil that are loams to clay loam. Landforms are rolling hills, divides, and ridges
... R036XA004NM – Gravelly Slopes
3)
Soils can be skeletal or non-skeletal; Surface textures can be gravelly to extremely gravelly loam, loam, very gravelly to extremely gravelly coarse sandy loam, extremely cobbly fine sandy loam, extremely gravelly sandy clay loam, fine sandy loam, very gravelly fine sandy loam, sandy loam, or gravelly sandy loam with a subsoil that is loamy
... F036XA136NM – Pinyon-Utah juniper/Apache plume
4)
Slopes 0-15%; soils are deep to very deep and skeletal and non-skeletal; Surface soil textures are cobbly loam, or loam. Subsoils are loamy. Landforms are nearly level alluvial fans, stream terraces, plateaus, mesas and volcanic cones
... R036XB018NM – Stony Loam
5)
Site not as above. Unclassified
28c.
Site not as above. Unclassified
1b.
Temperature regime is mesic and annual precipitation is 16-20" and mesic/frigid (36.1 NM) - Site not as above. Unclassified
Colorado & Utah MLRA 36 Ecological Site Key
1a.
Receive extra water beyond normal precipitation and are high in salinity and alkaline, mesic
2a.
Site with water table above 60”
A1.
Precipitation is 9-15”; High water table with deep gleyed soils; soil textures from clay loam and silty clay loam, poorly drained; strongly saline-alkaline. Landforms are gently sloping to flat in lowland position (drainageways, alluvial fans, and flood plain)
... R036XY266CO – Salt Meadow
A2.
Precipitation is 12-16”; High water table with deep gleyed soils; soil textures from loam or clay loam and subsoils are loamy textured, poorly drained. Landforms are gently sloping to flat in lowland position (draws, drainageways, swales, flood plains, flood-plain steps, and terraces)
... R036XY038CO – Wet Meadow
A3.
Precipitation 11-16”; Site has water table 30-60” and without run-in. Soils are deep. Soil surface textures are extremely cobbly sand and loamy fine sand. Landforms are flood plain, flood plain step and terrace
... R036XC013UT – Southwestern Plateau Riparian Complex Intermittent (Valley Type IV - F4/B4C Stream Type)
A4.
Site not as above. Unclassified
2b.
Site has a water table below 60”
B1.
Precipitation is 12-16”; Soils are deep; Site has a water table below 60”; Soils have loam and clay loam. Subsoils may have stratified layers. Soils can contain some alkali. Landforms are drainageways, draws, floodplains, and alluvial fans in narrow canyon bottoms with intermittent drainages flowing through them
... R036XY405CO – Loamy Bottom
B2.
Site not as above. Unclassified
1b.
Sites with no water table or not run in sites
3a
Temperature regime is mesic and annual precipitation is 8/9-12" ------ Semidesert
4a.
Shallow soils (≤20" in depth)
5a.
Slopes are steeper than 25%
6a.
Surface textures very boulder/very stony sandy clay loams, clay loams, and very stony loam. Subsoil textures can be sandy clay loam, clay loam, and silty clay loam and can have gravels, stones and boulders in it. Landforms are steep and very steep side-slopes of canyons and hills
... R036XY111CO – Steep Shallow Clay Loam (pinyon-Utah juniper)
6b.
Site not as above. Unclassified
5b.
Slopes are less than 25%
7a.
Soil Surface is sandy clay loam, silty clay loam, clay loam
C1.
Soils surface sandy clay loams, clay loams, and silty clay loams. Subsoil is clay textured (sandy clay loam, clay loam, silty clay loam). Parent materials are shale or interbedded sandstone and shale. Landforms are canyon walls, sideslopes and edges of mesas, pediments and dipslopes
... R036XY110CO – Shallow Clay Loam (pinyon-Utah juniper)
C2.
Soils are shallow to moderately deep. Surface textures are silty clay loam over subsoils that are silty clay or clay loam. Parent material is alluvium and residuum from Mancos and Morrison shale. Landforms are low alluvial terraces, ridges, hills, structural benches, and alluvial fans
... R036XY408CO – Basin Shale
C3.
Site not as above. Unclassified
7b.
Soil Surface is fine sandy loam, sandy loam and loams
8a.
Soil Surface is fine sandy loam, sandy loam and loams. Landforms are dipslopes, dipslopes on cuestas, cuestas, and eroded dipslopes on cuestas
... R036XY113CO – Semidesert Juniper Loam
8b.
Site not as above. Unclassified
7c.
Site not as above. Unclassified
4b.
Moderately deep to very deep soils (≥20" in depth)
9a.
Soil Surface is silty clay loam, silty clay or clay loam
D1.
Soils are deep; Soil surface silty clay loam, silty clay or clay loam; Subsoil are silty clay loam, clay loam or silty clay. Parent materials are mainly from cretaceous age shale (Manco Shale). Landforms are alluvial fans, terraces and fan terraces
... R036XY328CO – Semidesert Clay Loam
D2.
Soils are shallow to moderately deep. Surface textures are silty clay loam over subsoils that are silty clay or clay loam. Parent material is alluvium and residuum from Mancos and Morrison shale. Landforms are low alluvial terraces, ridges, hills, structural benches and alluvial fans
... R036XY408CO – Basin Shale
D3.
Site not as above. Unclassified
9b.
Soil Surface is fine sandy loam, very fine sandy loam
10a.
Subsoil is sandy clay loam, clay loam; Parent materials are mainly from sandstone or sandstone and shale. Landforms are structural benches, dipslopes, dipslopes on cuestas, alluvial fans, mesas, hills, valley floor and terraces
... R036XY325CO – Semidesert Loam
10b.
Subsoil is sandy loam. Parent materials are mainly from sandstone. Landforms are alluvial fans, fan terraces, mesas, and valley floors
... R036XY326CO – Semidesert Sandy Loam
10c.
Site not as above. Unclassified
9C.
Site not as above. Unclassified
3b.
Temperature regime is mesic and annual precipitation is 12-16" ------ Upland/Foothills zone – Central Colorado on the Western Slope (Uncompaghre Plateau Area and Grand Valley area)
11a.
Very shallow to Shallow soils (≤ 20" in depth)
12a.
Slopes are steeper than 25%
13a.
Soil surface is cobbly fine sandy loam, very gravelly clay loam, very stony sandy clay loam, very channery clay loam, and extremely gravelly loam. Landforms are very steep side slopes, canyon walls, dissected dipslopes, dissected dipslopes on cuestas, and mountain slopes and ridges
... R036XY445CO – Steep Colluvial Slopes
13b.
Site not as above. Unclassified
12b.
Slopes are less than 25%
E1.
Precipitation is 12-14”; slopes 3 to 10%; Soils surface textures are fine sandy loams, flaggy fine sandy loam and channery fine sand with a loamy subsoil and may have up to 15-20% flagstones and/or channers on the surface and in the profile. Landforms are plateaus, structural benches, mesa tops, ledges, escarpments and cuestas slopes
... R036XY315UT – Upland Shallow Loam (pinyon-Utah juniper)
E2.
Precipitation is 12-14”; slopes 2 to 20%; Soils surface textures are fine sandy loams to very fine sandy loams with loamy subsoil; non-saline, and moderately alkaline. Landforms are structural benches and cuestas
... R036XY316UT – Upland Shallow Loam (littleleaf mountain mahogany)
E3.
Precipitation is 12-16”; slopes 3 to 25%; soils are very shallow to shallow; Surface textures are fine sandy loam to loam, some gravels may be present on the surface. Subsoils are sandy clay loam, clay loam or loam that can have gravels up to 45%. Landforms are dipslopes, mountain slopes and structural benches
... R036XY114CO – Mountain Pinyon
E4.
Site not as above. Unclassified
11b.
Moderately deep to very deep soils (≥ 20" in depth)
13a.
Skeletal soils (≥35% rock fragments in the profile)
14a.
Not steep slopes (≤30% slopes)
15a.
Soil surface very cobbly loams, very gravelly loam, gravelly loam, loam, and fine sandy loam with sandy clay loam or clay loam subsurface with rock fragments. Landforms are escarpments, moraines, fan remnants, dipslopes, outwash fans, structural benches, and colluvial aprons
... R036XY287CO – Stony Foothills
15b.
Site not as above. Unclassified
14b.
Steep slopes ≥30%
F1.
Precipitation is 12-14”; skeletal soils (35%+ rock fragments); soils are very shallow to deep. Slopes between 50-75%; soils surface textures are very gravelly loamy sand, extremely channery fine sandy loam, stony fine sandy loam and from calcareous sandstone with loamy subsoil. Landforms are mesa escarpments, hill, and ridges
... R036XY328UT – Upland Very Steep Stony Loam (pinyon-Utah juniper)
F2.
Site not as above. Unclassified
13b.
Non-skeletal soils (≤35% rock fragments in the profile)
14a.
Soils textures are heavy clay loams (≥35%+ clay), silty clay loam and clays (Fine, clayey. Fine silty in particle control section; ≥35% clay)
15a.
Precipitation is 12-16”; slopes are 1-30%; soils are moderately deep to very deep; Soils surface textures are silty clay loam or clay loam. Subsoils are clay loam, silty clay loam, silty clay and clay from marine shale. Landforms hills, alluvial fans, pediments, complex landslides, terraces, fan remnants, fans, and valleys
... R036XY289CO – Clayey Foothills
15b.
Site not as above. Unclassified
14b.
Soils are sandy loam, fine sandy loam, loam, sandy clay loam or light clay loams (<35% clay)
16a.
Soils are sandy loam, fine sandy loam, light loam (≤18% clay), very fine sandy loam, loamy fine sand, sand(≤18% clay in soil profile)
17a.
Slopes 0-12%; Soils are deep; Soils are fine sandy loams, very fine sandy loams, and loamy fine sands; subsoil is loamy sand, sandy loam, sand or light loam textures. Landforms fan remnants, dunes, terraces, structural benches
... R036XY310CO – Sandy Foothills
17b.
Site not as above. Unclassified
16b.
Soils are loam (>18% clay), silt loam, sandy clay loam, clay loam (18-35% clay in soil profile)
G1.
1-15% slopes; Soils are moderately deep to deep. Surface textures are loam; subsoil can be loam, silt loam, sandy clay loam or clay loam. Landforms are hills, mesas, structural benches, alluvial fans and old terraces
... R036XY284CO – Loamy Foothills
G2.
Slopes 0-15%; Soils are deep to very deep. Soil surface ranges from sandy loam to a loam. Subsoil textures are clay loam, sandy clay loam, or loam. Landforms are concave upland valley bottoms and floors, stream terraces, toe-slopes, and alluvial fans. It is dissected in many places by gullies and draws running down the valleys
... R036XY347CO – Foothill Valley
G3.
Precipitation is 12-14”; Soils are moderately deep to very deep; Soils are fine sandy loams, sandy loam and sandy clay loam with a loamy subsoil; non-saline and neutral to slightly alkaline. Landforms are structural benches, plateaus, hills and mesas. Example soil – Plumasano & Nomrah
... R036XY306UT – Upland Loam (big sagebrush)
G4.
Precipitation is 12-14”; Soils are moderately deep to deep; soil surface textures are fine sandy loams and sandy loam with loamy subsoil. Landforms are structural benches and mesas edges, but may occur on cuestas, plateaus, hills and ridges. Example soil – Plumasano
... R036XY307UT – Upland Loam (pinyon-Utah juniper)
G5.
Precipitation is 12-14”; soils are moderately deep to deep. Soil surface textures are fine sandy loams, sandy loam and sandy clay loam with loamy subsoil; non-saline and neutral to slightly alkaline. Occurs on structural benches, mesas edges and cuestas, but may also occur on plateaus, hills and ridges. Example soil – Plumasano & Plumasano Family
... R036XC302UT – Upland Dissected Slope (pinyon-Utah juniper)
G6.
Site not as above. Unclassified
3c.
Temperature regime is mesic and annual precipitation is 15/16-18" ------ Upper Foothills/lower Mountain Zones – Southern Colorado and Northern Mexico (Utah Juniper representative species, Mesa Verde NP area)
18a.
Shallow soils (≤ 20" in depth)
H1.
Precipitation is 15-18”; slopes are 3-25%; soils are shallow; Soil surfaces are loamy sand, fine sandy loam, loam, cobbly fine sandy loam, gravelly sandy loam or channery fine sandy loam. Subsoil can be sandy clay loam, fine sandy loam, loam, and/or clay loam. Landforms are mesa, dissected dipslopes, dissected dipslopes on cuestas, and structural benches. Mesa Verde NP Area
... R036XY141CO – Shallow Loamy Mesa Top (pinyon-Utah juniper)
H2.
Precipitation is 15-18”; slopes are 3-25%; soils are shallow. Surface soil textures are very fine sandy loam, sandy clay loam to clay loam and subsoil is gravelly fine sandy loam, very gravelly clay loam, or clay loam. Landforms are hills, mesas, dissected dipslopes, and dissected dipslopes on cuestas.
... R036XY446CO – Southwestern Mountain (pinyon-Utah juniper)
H3.
Site not as above. Unclassified
18b.
Moderately deep to very deep soils (≥ 20" in depth)
I1.
Precipitation is 15-18”; slopes 1-15%; Surface soils are loam or gravelly sandy loam; subsoil is sandy clay loam or clay loam from calcareous eolian material. Shallow carbonatic calcic layer is common. Landform dissected dipslopes on cuestas, and mesas
... R036XY142CO – Loamy Mesa Top (pinyon-Utah juniper)
I2.
Precipitation is 15-18”; slope is 0-20%; soil surface is cobbly loam, or gravelly loam; subsoil is loam, sandy clay loam or clay loam and commonly very cobbly or very gravelly. Soils have argillic and calcic horizons. Landforms are generally nearly level to undulating mesas, ridge tops, old terraces, and slope breaks
... R036XY346CO – Cobbly Foothills
I3.
Site not as above. Unclassified
Ecological site photos
Tools
Filter by
interactive key
precipitation
frost free days
more..
clear all
Type
Image size
Print Options
Sections
Font
A
A
A
A
Other
Print
Briefcase
Add ecological sites and Major Land Resource Areas to your briefcase by clicking on the briefcase (
) icon wherever it occurs. Drag and drop items to reorder. Cookies are used to store briefcase items between browsing sessions. Because of this, the number of items that can be added to your briefcase is limited, and briefcase items added on one device and browser cannot be accessed from another device or browser. Users who do not wish to place cookies on their devices should not use the briefcase tool. Briefcase cookies serve no other purpose than described here and are deleted whenever browsing history is cleared.
Ecological sites
Major Land Resource Areas
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
