Soil subgroup
Torripsament ústico
It is drier than the typical one of the group: its humidity regime is on the border with the ustic.
What the name says
Soil Taxonomy names are built from parts, and each part says something about the soil. From general to specific:
| Taxonomic order | Entisol | Soil without diagnostic horizons, or almost: recently deposited material (sand, alluvium) or on which the climate did not have time to act. |
|---|---|---|
| Suborder | Psament | Entisol sandy throughout the profile: dunes, sand sheets. |
| Great group | Torripsament | Within the Psament suborder, it It has an arid climate (torric moisture regime). |
| Subgroup | ústico | It is drier than the typical one of the group: its humidity regime is on the border with the ustic. |
What it means for farming
Very variable. The sandy ones (Psamentes) retain little water and blow away; alluvial ones (Fluventes) can be good but they flood; the shallow ones on rock (lithic) are barely useful for grazing.
- Most common surface texture
- Sandy
- Most common drainage
- Excessive
- Typical effective depth
- 150 cm
Where it is found
According to the 1:500.000 national map, it covers about 1.524.226 ha, spread over 18 districts.
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National map units that list it. The scale is 1:500.000: good for seeing the region, not a single property.
| Province | Area |
|---|---|
| La Pampa | 777.139 ha |
| San Luis | 572.086 ha |
| Buenos Aires | 151.246 ha |
| Córdoba | 23.754 ha |
Districts where it is most common
- General Pedernera · San Luis
- Gobernador Dupuy · San Luis
- Curacó · La Pampa
- Utracán · La Pampa
- Villarino · Buenos Aires
- Rancul · La Pampa
- Caleu Caleu · La Pampa
- Loventué · La Pampa
- Hucal · La Pampa
- Puelén · La Pampa
- Puán · Buenos Aires
- San Alberto · Córdoba
- Conhelo · La Pampa
- Pocho · Córdoba
- Lihuel Calel · La Pampa
- Minas · Córdoba
- General Roca · Córdoba
- Toay · La Pampa
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 27 (low); half of the units fall between 14 and 33.
Taken from the maps that include this data. A map unit with several soils has a single index, and it is only attributed to the dominant soil.
Other Torripsament subgroups
Soils it shares map units with
Several soils share each map unit. These are the ones most often found alongside this one: on a property, you will likely find them in the nearby low ground or on the next rise.
The definitions are a plain-language summary of the USDA Keys to Soil Taxonomy. The formal definition includes thickness, color and percentage thresholds that are left out here.
Sources
- Soil Survey Staff. (2014). Claves para la Taxonomía de Suelos, 12.ª edición. USDA - Natural Resources Conservation Service. · Dominio público (USDA)
- INTA · Dominio público (carta 1:500.000)