Soil subgroup
Haplustol torrifluvéntico
Approaches Torrifluventes: layers of alluvium in arid climate.
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 | Molisol | Soil with a thick, dark surface horizon rich in organic matter (the mollic epipedon), with more than half of its exchange capacity occupied by calcium, magnesium, potassium and sodium. It forms under grassland. |
|---|---|---|
| Suborder | Ustol | Molisol from subhumid to semi-arid climate (ustic moisture regime): water is enough in the growing season but there are long dry periods. |
| Great group | Haplustol | Within the Ustol suborder, it It is the simplest of the suborder: it does not have a clay horizon or any other feature that places it in a more specific group.. |
| Subgroup | torrifluvéntico | Approaches Torrifluventes: layers of alluvium in arid climate. |
What it means for farming
They are the soils agricultural lands par excellence: the Pampas grassland formed them and most of Argentine agriculture is done on them. They retain water and nutrients; its limitation, when there is one, is below: clay, sodium, calcareous hardpan or drainage.
The dominant agricultural soil of the semi-arid plain: western Pampas, southern Córdoba, northern La Pampa, the dry Chaco.
- Most common surface texture
- Loam
- Most common drainage
- Something Excessive
- Typical effective depth
- 100 cm
Where it is found
According to the 1:500.000 national map, it covers about 83.189 ha, spread over 5 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 |
|---|---|
| Córdoba | 72.286 ha |
| Santiago del Estero | 10.903 ha |
Districts where it is most common
- Ischilín · Córdoba
- Cruz del Eje · Córdoba
- Ojo de Agua · Santiago del Estero
- Sobremonte · Córdoba
- Tulumba · Córdoba
It also appears on the detailed maps of: Santiago del Estero.
Other Haplustol 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)