Natural Resources
Conservation Service
Major Land Resource Area 134X
Major Land Resource Area
Accessed: 04/20/2026
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Ecological sites
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precipitation
frost free days
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Parent material origin
Parent material kind
Soil texture
Physiographic Subsection/LRU, Parent Material, Loess Depth, Position, Slope, Drainage, Flood Duration, Texture, and Natric with consideration for future splits to: Fragipan, Reaction, Base Saturation
Physiographic Subsection/LRU, Parent Material, Position with consideration for future splits to: Fragipan, Reaction, Loess Depth, Slope, Drainage, Base Saturation, Flood Duration
North of Big Black River
South of Big Black River
Southern Main Belt - 74d - Baton Rouge Terrace
Parent material loess
Parent material alluvium
Loess Hills physiographic subsection
Loess Plains physiographic subsection
Backslopes (greater than 12 percent slopes)
F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
Summits (less than 12 percent slopes)
F134XY002TN – Northern Deep Loess Summit
F134XY002TN – Northern Deep Loess Summit
No restrictive layers or episaturation
Restrictive layers (fragipan) or episaturation
Slopes less than 8 percent
Slopes greater than 8 percent
F134XY006AL – Northern Loess Sideslope
F134XY006AL – Northern Loess Sideslope
Interfluves/divides
F134XY003AL – Northern Loess Interfluve
F134XY003AL – Northern Loess Interfluve
Terraces
F134XY007AL – Northern Loess Terrace
F134XY007AL – Northern Loess Terrace
Interfluves/divides (uplands)
Terraces
Moderately well drained (fragipan)
F134XY012AL – Northern Loess Fragipan Upland
F134XY012AL – Northern Loess Fragipan Upland
Drainage poor (SWPD/PD)
Somewhat poorly drained
F134XY004AL – Northern Moderately Wet Loess Interfluve
F134XY004AL – Northern Moderately Wet Loess Interfluve
Poorly drained
F134XY005AL – Northern Wet Loess Interfluve
F134XY005AL – Northern Wet Loess Interfluve
Moderately well drained (fragipan)
F134XY013AL – Northern Loess Fragipan Terrace
F134XY013AL – Northern Loess Fragipan Terrace
Drainage poor (SWPD/PD)
Somewhat poorly drained
F134XY008AL – Northern Moderately Wet Loess Terrace
F134XY008AL – Northern Moderately Wet Loess Terrace
Poorly drained
Ponded depressions
F134XY011AL – Northern Ponded Loess Terrace
F134XY011AL – Northern Ponded Loess Terrace
No ponding
Natric soils
F134XY009AL – Northern Natric Loess Terrace
F134XY009AL – Northern Natric Loess Terrace
Absence of natric horizons
F134XY010AL – Northern Wet Loess Terrace
F134XY010AL – Northern Wet Loess Terrace
Soils non-acid reaction class (typically associated with floodplains in deep loess landscapes – e.g., Loess Hills)
Soils acid reaction class
Well to moderately well drained
F134XY014AL – Northern Non-Acid Floodplain
F134XY014AL – Northern Non-Acid Floodplain
Drainage poor (SWPD/PD)
Somewhat poorly drained
F134XY015AL – Northern Non-Acid Moderately Wet Floodplain
F134XY015AL – Northern Non-Acid Moderately Wet Floodplain
Poorly drained
F134XY016AL – Northern Non-Acid Wet Floodplain
F134XY016AL – Northern Non-Acid Wet Floodplain
Soil drainage well to excessive (natural levees)
Soil drainage poor (level to depressional floodplains)
Excessively drained
F134XY017AL – Northern Sandy Drainageway
F134XY017AL – Northern Sandy Drainageway
Well to moderately well drained
F134XY018AL – Northern Alluvial Flat
F134XY018AL – Northern Alluvial Flat
Somewhat poorly drained
F134XY019AL – Northern Moderately Wet Alluvial Flat
F134XY019AL – Northern Moderately Wet Alluvial Flat
Poorly drained
Level floodplain (not ponded)
F134XY020AL – Northern Wet Alluvial Flat
F134XY020AL – Northern Wet Alluvial Flat
Ponded depressions
F134XY021AL – Northern Backswamp
F134XY021AL – Northern Backswamp
Loess
Loess over Marine Sediments
Alluvium
74a Southern Bluff Hills
74c Southern Rolling Plains
Loess greater than 4 feet thick
Summits
Backslope
Less than 12% Slope
Well Drained
F134XY107MS – Southern Deep Loess Summit
F134XY107MS – Southern Deep Loess Summit
Greater than 12% Slope
Well Drained
F134XY108MS – Southern Deep Loess Backslope
F134XY108MS – Southern Deep Loess Backslope
No Fragipan
Fragipan
Loess greater than 4 feet thick
Terrace
Less than 8% Slope
Poorly Drained
No Ponding
Natric
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
Not Natric
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
Loess greater than 4 feet thick
Interfluve
Sideslope
Terrace
Less than 8% Slope
Somewhat Poorly Drained
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
Moderately Well Drained
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
Greater than 8% Slope
Moderately Well Drained
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
Less than 8% Slope
Moderately Well Drained
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
Southern Rolling Plains
No Fragipan
Fragipan
Loess 2 - 4 feet thick
Summit
Backslope
Less than 8% Slope
Well drained
F134XY106MS – Southern Rolling Plains Thin Loess Upland
F134XY106MS – Southern Rolling Plains Thin Loess Upland
Greater than 8% Slope
Well drained
F134XY106MS – Southern Rolling Plains Thin Loess Upland
F134XY106MS – Southern Rolling Plains Thin Loess Upland
Loess 2 - 4 feet thick
Summit
Terrace
Less than 8% Slope
Well Drained, Moderately Well Drained
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
Greater than 8% Slope
Moderately Well Drained, Somewhat Poorly Drained
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
F134XY103MS – Southern Rolling Plains Loess Wet Terrace
Non-Acid
Acid
Drainageways
Well Drained, Moderately Well Drained
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
Natural Levee
Drainageways
Excessively Drained, Well Drained, Moderately Well Drained
Loamy
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
Well Drained, Moderately Well Drained
Somewhat Poorly Drained
Poorly Drained
Silty
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
F134XY102MS – Southern Rolling Plains Loess Stream Terrace
Silty
F134XY101MS – Southern Rolling Plains Loess Drainways
F134XY101MS – Southern Rolling Plains Loess Drainways
Entic/Inceptic soil Orders
Silty
F134XY101MS – Southern Rolling Plains Loess Drainways
F134XY101MS – Southern Rolling Plains Loess Drainways
Loess
Fragipan
No Fragipan
Fragipan
No Fragipan
2nd Terrace
Somewhat Poorly Drained
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
2nd Terrace
Moderately Well Drained
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
Somewhat Poorly Drained
High Sodium
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
1st Terrace
Somewhat Poorly Drained
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
1st Terrace
Lower Landscape
Stream Terrace
F134XY122LA – Baton Rouge Terrace Southern Loess Stream Terrace
F134XY122LA – Baton Rouge Terrace Southern Loess Stream Terrace
Ridge in Alluvial Swamp
F134XY122LA – Baton Rouge Terrace Southern Loess Stream Terrace
F134XY122LA – Baton Rouge Terrace Southern Loess Stream Terrace
Stream Bottom (Natural Levee)
F134XY121LA – Baton Rouge Terrace Southern Loess Drainageway
F134XY121LA – Baton Rouge Terrace Southern Loess Drainageway
Somewhat Poorly Drained
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
Poorly Drained
F134XY123LA – Baton Rouge Terrace Southern Loess Low Terrace
F134XY123LA – Baton Rouge Terrace Southern Loess Low Terrace
Somewhat Poorly Drained
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
F134XY124LA – Baton Rouge Terrace Southern Loess Terrace
Poorly Drained
High Sodium
F134XY123LA – Baton Rouge Terrace Southern Loess Low Terrace
F134XY123LA – Baton Rouge Terrace Southern Loess Low Terrace
Crowley’s Ridge uplands
Loess-capped terraces (Pleistocene Valley Trains)
Floodplains
Loess greater than 4 feet thick
Loess-fluviomarine sediment complex
Fragipan
F134XY207AL – Western Fragipan Uplands
F134XY207AL – Western Fragipan Uplands
No fragipan
Backslopes greater than 12 percent slopes
F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
Summits less than 12 percent slopes
F134XY002TN – Northern Deep Loess Summit
F134XY002TN – Northern Deep Loess Summit
Backslopes greater than 12 percent slopes
F134XY208AL – Western Dry Loess Backslope
F134XY208AL – Western Dry Loess Backslope
Summits less than 12 percent slopes
F134XY210AL – Western Dry Loess Summit
F134XY210AL – Western Dry Loess Summit
No restrictive horizons; well drained
F134XY201AL – Western Loess Terrace
F134XY201AL – Western Loess Terrace
Restrictive horizons present or poorly drained soils with a glossic horizon
Moderately well drained fragipan
F134XY206AL – Western Fragipan Terrace
F134XY206AL – Western Fragipan Terrace
Somewhat poorly drained fragipan
F134XY209AL – Western Moderately Wet Terrace
F134XY209AL – Western Moderately Wet Terrace
Poorly drained fragipan/glossic horizon
F134XY202AL – Western Wet Loess Terrace
F134XY202AL – Western Wet Loess Terrace
Natric horizon
F134XY203AL – Western Alkali Flatwoods
F134XY203AL – Western Alkali Flatwoods
Well to moderately well drained
F134XY204AL – Western Alluvial Flat
F134XY204AL – Western Alluvial Flat
Somewhat poorly drained
F134XY205AL – Western Moderately Wet Alluvial Flat
F134XY205AL – Western Moderately Wet Alluvial Flat
Loamy Alluvial - Minimal Loess
Loess
Loess less than 1 foot thick
Ridge on Terraces
Well Drained
Somewhat Poorly Drained
F134XY304LA – West Central Somewhat Poorly Drained Flats
F134XY304LA – West Central Somewhat Poorly Drained Flats
Loamy
F134XY306LA – West Central Well Drained Loamy Ridge
F134XY306LA – West Central Well Drained Loamy Ridge
Loess greater than 4 feet thick
Loess 2 - 4 feet thick
Scarps & Covex ridges
Summits
Slopes 1 - 20 % (RV)
Well Drained - Moderately Well Drained
F134XY308LA – West Central Scarp And Steep Loess Ridge - 5% & Greater Slope
F134XY308LA – West Central Scarp And Steep Loess Ridge - 5% & Greater Slope
Slopes 1 - 5 % (RV)
Well Drained - Moderately Well Drained
F134XY307LA – West Central Loess Ridge
F134XY307LA – West Central Loess Ridge
Terrace
Flats
Broad Flats, Drains & Depressions
Somewhat Poorly Drained
Natric
F134XY303LA – West Central Natric Loess Terrace
F134XY303LA – West Central Natric Loess Terrace
Poorly Drained
Natric
F134XY303LA – West Central Natric Loess Terrace
F134XY303LA – West Central Natric Loess Terrace
Poorly Drained
Brief Flood Duration
F134XY302LA – West Central Swales/Depressions Wet Flats
F134XY302LA – West Central Swales/Depressions Wet Flats
Long Flood Duration
F134XY301LA – West Central Flooded Swales And Depressions And Flood Plains
F134XY301LA – West Central Flooded Swales And Depressions And Flood Plains
Loess - 34j
Pre-Peorian age Loess - 35f
Summit
R134XY404LA – Southwestern Loess Ridge Prairie
R134XY404LA – Southwestern Loess Ridge Prairie
Sideslope Summit
R134XY404LA – Southwestern Loess Ridge Prairie
R134XY404LA – Southwestern Loess Ridge Prairie
2nd Terrace
R134XY404LA – Southwestern Loess Ridge Prairie
R134XY404LA – Southwestern Loess Ridge Prairie
1st Terrace
R134XY402LA – Southwestern Loess Terrace Prairie
R134XY402LA – Southwestern Loess Terrace Prairie
Lower Landscape
R134XY402LA – Southwestern Loess Terrace Prairie
R134XY402LA – Southwestern Loess Terrace Prairie
Stream Bottom
F134XY121LA – Baton Rouge Terrace Southern Loess Drainageway
F134XY121LA – Baton Rouge Terrace Southern Loess Drainageway
Terrace
R134XY421LA – Southwestern Pre-Peoria Loess Prairie
R134XY421LA – Southwestern Pre-Peoria Loess Prairie
Long term average mean annual precipitation
- No filter
- 100 – 120cm (39 – 47in)
- 120 – 140cm (47 – 55in)
- 140 – 500cm (55 – 197in)
—
cm
Long term average frost free days
- No filter
- 150 – 170days
- 170 – 190days
- 190 – 210days
- 210 – 230days
- 230 – 250days
- 250 – 270days
—
days
- No filter
- 0 – 200m (0 – 700ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
- 40 – 45%
- 45 – 50%
- 50 – 60%
- 60 – 70%
- 70 – 80%
- 80 – 90%
—
%
- No filter
- Alluvial fan
- Alluvial flat
- Backswamp
- Bluff
- Depression
- Divide
- Drainageway
- Escarpment
- Flat
- Flood plain
- Flood-plain splay
- Hill
- Interfluve
- Knoll
- Loess bluff
- Loess hill
- Natural levee
- Oxbow
- Plain
- Point bar
- Ravine
- Ridge
- Rise
- Slough
- Stream terrace
- Terrace
- Valley train
- No filter
- Limestone, unspecified
- No filter
- Residuum
Soil surface texture
- No filter
- Fine sand
- Fine sandy loam
- Loam
- Loamy sand
- Sand
- Silt
- Silty clay loam
- Silt loam
- Sandy loam
- Very fine sandy loam
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Ecological site keys
MLRA 134 Main Belt (east of Mississippi River)
I.
North of Big Black River
A.
Parent material loess
1
Loess Hills physiographic subsection
i.
Backslopes (greater than 12 percent slopes)
... F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
2
Loess Plains physiographic subsection
i.
No restrictive layers or episaturation
a.
Slopes less than 8 percent
ii.
Restrictive layers (fragipan) or episaturation
a.
Interfluves/divides (uplands)
2
Drainage poor (SWPD/PD)
b.
Terraces
2
Drainage poor (SWPD/PD)
ii.
Poorly drained
b.
No ponding
B.
Parent material alluvium
1
Soils non-acid reaction class (typically associated with floodplains in deep loess landscapes – e.g., Loess Hills)
ii.
Drainage poor (SWPD/PD)
2
Soils acid reaction class
i.
Soil drainage well to excessive (natural levees)
ii.
Soil drainage poor (level to depressional floodplains)
b.
Poorly drained
II.
South of Big Black River
A.
Loess
1
74a Southern Bluff Hills
i.
Loess greater than 4 feet thick
a.
Summits
1
Less than 12% Slope
b.
Backslope
1
Greater than 12% Slope
2
74c Southern Rolling Plains
i.
No Fragipan
a.
Loess greater than 4 feet thick
1
Terrace
i.
Less than 8% Slope
a.
Poorly Drained
1
No Ponding
ii.
Fragipan
a.
Loess greater than 4 feet thick
1
Interfluve
i.
Less than 8% Slope
2
Sideslope
i.
Greater than 8% Slope
3
Terrace
i.
Less than 8% Slope
B.
Loess over Marine Sediments
1
Southern Rolling Plains
i.
No Fragipan
a.
Loess 2 - 4 feet thick
1
Summit
i.
Less than 8% Slope
2
Backslope
ii.
Greater than 8% Slope
ii.
Fragipan
a.
Loess 2 - 4 feet thick
1
Summit
i.
Less than 8% Slope
a.
Well Drained, Moderately Well Drained
... F134XY105MS – Southern Rolling Plains Loess Fragipan Upland
2
Terrace
i.
Greater than 8% Slope
a.
Moderately Well Drained, Somewhat Poorly Drained
... F134XY103MS – Southern Rolling Plains Loess Wet Terrace
C.
Alluvium
1
Non-Acid
i.
Drainageways
a.
Well Drained, Moderately Well Drained
... F134XY102MS – Southern Rolling Plains Loess Stream Terrace
2
Acid
i.
Natural Levee
a.
Excessively Drained, Well Drained, Moderately Well Drained
ii.
Drainageways
a.
Well Drained, Moderately Well Drained
b.
Somewhat Poorly Drained
c.
Poorly Drained
1
Entic/Inceptic soil Orders
III.
Southern Main Belt - 74d - Baton Rouge Terrace
A.
Loess
1
Fragipan
i.
2nd Terrace
2
No Fragipan
i.
2nd Terrace
b.
Somewhat Poorly Drained
3
Fragipan
i.
1st Terrace
4
No Fragipan
i.
1st Terrace
ii.
Lower Landscape
b.
Poorly Drained
MLRA 134 Northwest - Crowleys Ridge (west of Mississippi River)
I.
Crowley’s Ridge uplands
A.
Loess greater than 4 feet thick
2
No fragipan
i.
Backslopes greater than 12 percent slopes
... F134XY001TN – Northern Deep Loess Backslope Mesophytic Forest
B.
Loess-fluviomarine sediment complex
II.
Loess-capped terraces (Pleistocene Valley Trains)
B.
Restrictive horizons present or poorly drained soils with a glossic horizon
III.
Floodplains
MLRA 134 Central-west - Macon Ridge (west of Mississippi River)
I.
Loamy Alluvial - Minimal Loess
A.
Loess less than 1 foot thick
1
Ridge on Terraces
i.
Well Drained
II.
Loess
A.
Loess greater than 4 feet thick
1
Scarps & Covex ridges
i.
Slopes 1 - 20 % (RV)
a.
Well Drained - Moderately Well Drained
... F134XY308LA – West Central Scarp And Steep Loess Ridge - 5% & Greater Slope
2
Summits
ii.
Slopes 1 - 5 % (RV)
B.
Loess 2 - 4 feet thick
1
Terrace
i.
Somewhat Poorly Drained
2
Flats
i.
Poorly Drained
3
Broad Flats, Drains & Depressions
i.
Poorly Drained
b.
Long Flood Duration
... F134XY301LA – West Central Flooded Swales And Depressions And Flood Plains
MLRA 134 Southwest - Lafayette Loess (west of Mississippi River)
I.
Loess - 34j
II.
Pre-Peorian age Loess - 35f
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.
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