Holdrege soil series
Fine-silty, mixed, superactive, mesic Typic Argiustolls
Mollisols — soils with a thick, dark, organic-rich topsoil
With 2.79 million acres mapped, Holdrege is the 18th-largest of 24,791 U.S. soil series. In Nebraska only one series covers more ground. It is the largest of the 9 established series in its family. It is the state soil of Nebraska.
- Depth
- Very deep
- Drainage
- Well drained
- Water movement
- Moderate
Where Holdrege is mapped
2,786,821 acres in 62 soil survey areas, from current SSURGO data.
In the field
Drainage
Well drained
Soil depth
Very deep
Permeability
Moderate
- Parent material
- Loess
- Landform
- Uplands
- Type location
- Nebraska
How it is classified
- OrderMollisols
- SuborderUstolls
- Great groupArgiustolls
- SubgroupTypic Argiustolls
- FamilyFine-silty, mixed, superactive, mesic Typic Argiustollsfine-silty particle-size classmixed mineralogy classsuperactive cation-exchange activity classmesic soil temperature regime
Against other Mollisols
Holdrege makes up 0.64% of all mapped Mollisols — the 8th largest of 7,593 series in the order.
Solum thickness (topsoil + subsoil)
76 cm under a median of 104 cm
Depth to the subsoil
30 cm over a median of 25 cm
Depth described
203 cm over a median of 152 cm
Its relatives
Horizon by horizon
| Horizon | Layer | Depth | Thickness |
|---|---|---|---|
| Ap | Topsoil: plowed | 0–15 cm0–6 in | 15 cm |
| A | Topsoil | 15–30 cm6–12 in | 15 cm |
| Bt1 | Subsoil: clay build-up | 30–38 cm12–15 in | 8 cm |
| Bt2 | Subsoil: clay build-up | 38–61 cm15–24 in | 23 cm |
| BC | Subsoil grading to parent material | 61–76 cm24–30 in | 15 cm |
| C | Parent material | 76–203 cm30–80 in | 127 cm |
Sources: USDA–NRCS Official Series Description (revised 2018-06), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides