Soil great group
Torrifluvent
Of the Fluvent suborder; it It has an arid climate (torric moisture regime).
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 | Fluvent | Entisol formed by layers of alluvium left by a river when it overflows; organic matter rises and falls with each layer. |
| Great group | Torrifluvent | Within the Fluvent suborder, it It has an arid climate (torric moisture regime). |
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
- Well drained
- Typical effective depth
- 80 cm
Where it is found
According to the 1:500.000 national map, it covers about 7.312.335 ha, spread over 101 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 |
|---|---|
| Mendoza | 2.357.624 ha |
| Río Negro | 1.017.600 ha |
| San Juan | 885.010 ha |
| Chubut | 623.575 ha |
| Catamarca | 535.207 ha |
| San Luis | 311.445 ha |
| Santa Cruz | 277.417 ha |
| La Rioja | 276.387 ha |
| Santiago del Estero | 234.116 ha |
| Salta | 224.843 ha |
Districts where it is most common
- Lavalle · Mendoza
- Malargüe · Mendoza
- Jáchal · San Juan
- San Rafael · Mendoza
- El Cuy · Río Negro
- General Roca · Río Negro
- La Paz · Mendoza
- Deseado · Santa Cruz
- 25 de Mayo · San Juan
- Gastre · Chubut
- San Carlos · Mendoza
- Figueroa · Santiago del Estero
- Pomán · Catamarca
- Belén · Catamarca
- General Juan Facundo Quiroga · La Rioja
- Belgrano · San Luis
- Limay Mahuida · La Pampa
- Avellaneda · Río Negro
- Caucete · San Juan
- Santa Rosa · Mendoza
It also appears on the detailed maps of: Santiago del Estero.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 20 (low); half of the units fall between 19 and 43.
Land capability
class VII: 100%
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.
Subgroups on the maps
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)