Bibb soil series
Coarse-loamy, siliceous, active, acid, thermic Typic Fluvaquents
Entisols — young soils with little or no horizon development
With 2.30 million acres mapped, Bibb is the 25th-largest of 24,791 U.S. soil series. It is mapped in 12 states, more than any other series in this atlas. In Alabama only four series cover more ground. It is the only series in the atlas that belongs to the great group Fluvaquents.
- Depth
- Very deep
- Drainage
- Poorly drained
- Water movement
- Moderate
Where Bibb is mapped
2,303,319 acres in 216 soil survey areas, from current SSURGO data.
Share of all Bibb acres
- Rank in the state · share of its mapped soil
- Alabama 5th of 439 · 2.15%
- Georgia 20th of 327 · 1.26%
- Mississippi 15th of 264 · 1.47%
- North Carolina 18th of 488 · 1.11%
In the field
Drainage
Poorly drained
Of the 6 atlas series that are poorly drained, this is the largest.
Soil depth
Very deep
Permeability
Moderate
- Parent material
- Alluvium
- Landform
- Flood plains, coastal plains
- Type location
- Alabama
How it is classified
- OrderEntisols
- SuborderAquents
- Great groupFluvaquents
- SubgroupTypic Fluvaquents
- FamilyCoarse-loamy, siliceous, active, acid, thermic Typic Fluvaquentscoarse-loamy particle-size classsiliceous mineralogy classactive cation-exchange activity classacid reaction classthermic soil temperature regime
Against other Entisols
Bibb makes up 1.17% of all mapped Entisols — the 4th largest of 3,003 series in the order. Its solum, subsoil depth and described depth all lie within 5 cm of the order’s medians.
Its relatives
Horizon by horizon
| Horizon | Layer | Depth | Thickness |
|---|---|---|---|
| A | Topsoil | 0–10 cm0–4 in | 10 cm |
| Ag | Topsoil: gleyed: gray from wetness | 10–30 cm4–12 in | 20 cm |
| Cg1 | Parent material: gleyed: gray from wetness | 30–94 cm12–37 in | 64 cm |
| Cg2 | Parent material: gleyed: gray from wetness | 94–152 cm37–60 in | 58 cm |
Sources: USDA–NRCS Official Series Description (revised 2014-03), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides